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Improving the room-temperature bendability of Mg-3Al-1Zn alloy sheet by introducing a bimodal microstructure and the texture re-orientation 被引量:3
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作者 Chao He Yibing Zhang +6 位作者 Ming Yuan Bin Jiang Qinghang Wang Yanfu Chai Guangsheng Huang Dingfei Zhang Fusheng Pan 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第7期1322-1333,共12页
A significant enhancement of bendability was achieved by the introduction of bimodal microstructure for AZ31B alloy sheets via pre-compression and subsequent annealing(PCA)process.This combined treatment led to the c-... A significant enhancement of bendability was achieved by the introduction of bimodal microstructure for AZ31B alloy sheets via pre-compression and subsequent annealing(PCA)process.This combined treatment led to the c-axis of the extracted samples that were inclined by 30°to the rolling direction(30°sample)further shifting toward the rolling direction(RD)and resulting in a higher Schmid factor(SF)value of basal slip under the RD tensile stress.Furthermore,the bimodal microstructure that was introduced by the PCA process broke the damage bands(DBs)in the initial hot rolled AZ31B alloy sheets and gave rise to a more uniform strain distribution in the outer tension region of the bending samples,in which the tensile deformation was accommodated by the equally distributed{101^(-)2}tension twinning and basal slip.Consequently,the bimodal microstructure,shifted basal texture and the modification of DBs were responsible for the significant enhancement in the bendability of the AZ31 alloys. 展开更多
关键词 magnesium alloy pre-compression TEXTURE bimodal microstructure bendability
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Utilization of surface nanocrystalline to improve the bendability of AZ31 Mg alloy sheet 被引量:1
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作者 Jianyue Zhang Xuzhe Zhao +1 位作者 De'an Meng Qingyou Han 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2022年第7期1413-1424,共12页
A surface nanocrystalline was fabricated by ultrasonic shot peening(USSP)treatment at AZ31 Mg alloy.The effect of nanocrystalline thickness and its placed side(external or internal)on the bendability was studied by a ... A surface nanocrystalline was fabricated by ultrasonic shot peening(USSP)treatment at AZ31 Mg alloy.The effect of nanocrystalline thickness and its placed side(external or internal)on the bendability was studied by a V-bending test.Three durations,5,10,and 15 min,were applied to form the surface nanocrystalline with thicknesses of 51,79,and 145μm,respectively.Two-side treatment led to a similar bendability as that of as-received.One-side internal treatment for 5 min resulted in an improved bendability while the improvement was limited and degenerated for longer treatment.The improvement was related to the drawing back of the neutral axis.The one-side external treatment also improved the bendability,and the improvement was due to the redistribution of strain and stress during bending.With nanocrystalline at external side,it resulted in a larger stress but a smaller strain at the convex,which prevented the happening of crack during bending. 展开更多
关键词 AZ31 magnesium alloy ultrasonic shot peening surface nanocrystalline bendability neutral axis
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Development of a hot-rolled 980 MPa advanced high-strength steel with excellent flangeability and bendability 被引量:1
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作者 ZHANG Chen WANG Huanrong 《Baosteel Technical Research》 CAS 2022年第4期16-20,共5页
A new 980 MPa advanced high-strength steel(AHSS) with excellent bendability and flangeability has been studied and industrially produced, typical of tensile strength, fractured elongation, and hole expansion ratio(HER... A new 980 MPa advanced high-strength steel(AHSS) with excellent bendability and flangeability has been studied and industrially produced, typical of tensile strength, fractured elongation, and hole expansion ratio(HER) exceeding 980 MPa, 10%,and 30%,respectively.The 90° V-type bending perpendicular to the rolling direction can satisfy the R/t=1.0 requirement, indicating excellent bendability.Systematic evaluations of industrial trial-produced 980 MPa hot-rolled AHSS have been conducted, including microstructure, tensile properties in three directions, HER,bendability, fatigue limit strength, and forming limit.The microstructure of the newly developed 980 MPa AHSS primarily consists of fine bainite and a small amount of martensite-austenite constituent.The practical yield and tensile strength are higher than 800 and 980 MPa, respectively, with typical elongation of 13% and HER of around 40%.The good combination of the newly developed 980 MPa AHSS is primarily attributed to the fine bainitic microstructure, resulting in excellent flangeability and bendability.In addition, the newly developed 980 MPa AHSS has good fatigue and forming properties, making it suitable for the production of chassis and suspension components. 展开更多
关键词 hot rolled advanced high-strength steel(AHSS) flangeability bendability hole expansion ratio(HER)
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Study on the bendability and toughness of a 1 500 MPa cold-rolled martensitic sheet steel
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作者 ZHU Xiaodong XUE Peng +1 位作者 LI Wei ZHANG Hanlong 《Baosteel Technical Research》 CAS 2016年第3期28-34,共7页
Cold rolled martensitic sheet steels are achieving more and more applications in car-making because of their ultra-high strength and potential for weight reduction. The relatively low plasticity of ultra-high strength... Cold rolled martensitic sheet steels are achieving more and more applications in car-making because of their ultra-high strength and potential for weight reduction. The relatively low plasticity of ultra-high strength martensitic steels might be a drawback for the applications in the aspects of forming and safety protection function and should be significantly noted. A 1 500 MPa grade cold rolled martensitic sheet steel has been studied to investigate the bendability at 90 degree bending and impact toughness as well as fracture surface morphology at various temperatures. Some discussions have been made basing upon the experiment data to get some understanding on the performance of the materials under various conditions and on how to make use of this kind of ultra high strength steel properly. 展开更多
关键词 cold rolled martensitic steel sheet bendability TOUGHNESS
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Effect of gradient microstructure on the bendability of AZ31 alloy sheet
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作者 Lintao Liu Jieyu Li +6 位作者 Shengwen Bai Bin Jiang Chao He Jianxin Zhou Guangsheng Huang Dingfei Zhang Fusheng Pan 《Journal of Materials Science & Technology》 SCIE EI CAS 2024年第11期143-154,共12页
Extensive researches have elucidated the pronounced benefits of gradient microstructures for the me-chanical properties of metallic materials.However,the ramifications of gradient microstructures on formability,partic... Extensive researches have elucidated the pronounced benefits of gradient microstructures for the me-chanical properties of metallic materials.However,the ramifications of gradient microstructures on formability,particularly regarding their effects on bendability,remain inadequately understood.In this work,the effects of gradient microstructure on the bendability of AZ31 Mg alloy sheet are systematically investigated by comparing the microstructure evolution and strain distribution in the sheets with uni-form microstructure(grain size=12.8 μm and 91.3 μm)and gradient microstructure(grain size=11.5-75.4 μm).The results show that the bendability of the sheet with gradient microstructure is significantly improved when the fine grains(FGs)are placed at the outer side(TBE-FG sample)and the bendability is increased by 93.1%compared to the sample with fine and uniform microstructure(CE-FG sample).With coarse grains(CGs)placed at the inner side,the strain at the compressive region of the TBE-FG sample is higher than its counterparts,while the tensile strain at the extended region is lowest among the four samples.Quasi-in-situ bending experiments reveal that the CGs at the inner side of the TBE-FG sample undergo more twinning.Moreover,the increment of residual dislocation density at the outer side of the TBE-FG sample is lower than those of other samples,which extends the bending potential.This work provides a novel perspective to improve the bendability of the Mg alloy sheet. 展开更多
关键词 Gradient microstructure bendability Strain distribution Quasi-in-situ bending
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A Study on Multi-defect Constrained Bendability of Thin-walled Tube NC Bending Under Different Clearance 被引量:24
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作者 LI Heng YANG He 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2011年第1期102-112,共11页
Thin-walled tube numerical control (NC) bending is a tri-nonlinear physical process with multi-defect and multi-die constraints. The clearance on each contact interface is the major factor to indicate the contact co... Thin-walled tube numerical control (NC) bending is a tri-nonlinear physical process with multi-defect and multi-die constraints. The clearance on each contact interface is the major factor to indicate the contact conditions. A three-dimensional-finite element (3D-FE) model is established to consider the realistic dynamic boundary conditions of multiple dies under ABAQUS/Explicit platform. Combined with experiment, numerical study on bending behavior and bendability under different clearance between tube and various dies is conducted in terms of wrinkling, wall thinning and cross section deformation. The results show that (1)with smaller clearance of tube-wiper die and tube-mandrel, the wrinkling can be restrained while the wall thinning It and cross-section deformation Id increase; while excessive small clearance blocks tube materials to flow past tangent point and causes piles up, the onset of wrinkling enhances It and Id. (2)Both It and Id decrease with smaller clearance of tube-pressure die; the wrinkling possibility rises with larger clearance on this interface if the mandrel’s freedom along Y-axis is opened; smaller clearance of tube-bend die prevents wrinkling while increases It, and the clearance on this interface has little effect on Id. (3)A modified Yoshida buckling test (YBT) is used to address the wrinkling mechanisms under normal constraints in tube bending: the smaller clearance may restrain wrinkling efficiently; the smaller wall thickness, the less critical clearance needed; the critical clearance for tube bending 38 mm×1 mm×57 mm (tube outer diameter×wall thickness×centerline bending radius) equals about 20% of initial wall thickness. 展开更多
关键词 bendability CLEARANCE DEFECTS thin-walled tube numerical control bending
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ExExperimental and numerical studies on the prediction of bendability limit of QSTE340 welded tube in NC bending process 被引量:2
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作者 YANG He REN Ning +5 位作者 ZHAN Mei ZHANG ZhiYong QIN YaTao JIANG HaoMin DIAO KeShan CHEN XinPing 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第8期2264-2277,共14页
For a low carbon steel tube with small wall factor D/t and bending radius R,the over-thinning induced localized necking is one dominant failure in tube numerical control(NC) bending process,which strongly restricts th... For a low carbon steel tube with small wall factor D/t and bending radius R,the over-thinning induced localized necking is one dominant failure in tube numerical control(NC) bending process,which strongly restricts the bendability limit of the tube.In addition,the deterioration of bendability of a tube is increased by the existence of the weak weld region.Therefore,an important issue is how to determinate and predict the welded tube bendability limit.In the present study,a finite element(FE) model with weld and subdivided heat affected zones under ABAQUS platform is employed to explore the deformation behaviors of welded tube NC bending.A localized necking criterion based on the critical thickness thinning is used to predict the critical principal strains,critical bending radius and burst location during the forming process.It is found that the failures always occur at the rigid supporting point of mandrel flexible balls near the tangent point at the outside of the bend,where the wall thickness of the tube is the lowest.The bending limit curves(BLCs) of the QSTE340 welded tube are obtained by shifting the standard shaped forming limit curve to the critical principal strains along the major strain axis.Comparison between the numerical and experimental results has shown that the BLC and critical bending radius predictions agree well with the experimental results.In addition,the effect of weld positions on BLC is discussed,the weld region shows an almost negligible effect on the forming limit at a non-critical location that is far away from the outside of the bend.However,when the weld is at the large tensile deformation region on the outside of the bend,a decrease of the forming limit strains is seen. 展开更多
关键词 bendability limit welded tube NC bending FE simulation critical thickness thinning
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Comparison of microstructures and mechanical properties of composite extruded AZ31 sheets 被引量:12
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作者 Yanfu Chai Yan Song +7 位作者 Bin Jiang Jie Fu Zhongtao Jiang Qingshan Yang Haoran Sheng Guangsheng Huang Dingfei Zhang Fusheng Pan 《Journal of Magnesium and Alloys》 SCIE 2019年第4期547-554,共8页
The microstructures and mechanical properties of the composite extruded AZ31/AZ31 and AZ31/4047 Al sheets were investigated and made a comparison to the conventional extruded AZ31 sheet.Owing to the introduced intense... The microstructures and mechanical properties of the composite extruded AZ31/AZ31 and AZ31/4047 Al sheets were investigated and made a comparison to the conventional extruded AZ31 sheet.Owing to the introduced intense shear deformation at the interface during the composite extrusion,grain refinement and tilted texture were detected in AZ31 layers of the AZ31/AZ31 and AZ31/4047 Al sheets,while the conventional extruded AZ31 sheet exhibited a relative coarse,inhomogeneous microstructure and strong basal texture.The compressiontension yield ratio was increased gradually from the AZ31 to the AZ31/AZ31 and AZ31/4047 Al sheets.Besides,the AZ31/4047 Al sheet could successfully accomplish the whole bending forming process at room temperature,while the AZ31 and AZ31/AZ31 sheets were both bend-formed to failure with significant cracks in the outer tensile region under the identical bending parameters.Moreover,under the same bending strain,both the outward offset degree of strain neutral layer and the sheet thickening were more serious in the AZ31/4047 Al composite sheet than those of the AZ31 and AZ31/AZ31 sheets.The foremost reason was the quite wide gap of material properties between Mg alloy AZ31 layer(tensile loading in the outer region)and Al 4047 layer(compressive loading in the inner region). 展开更多
关键词 Mg alloy sheet Composite extrusion Tension-compression yield asymmetry bendability
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Recent progress of efficient flexible solar cells based on nanostructures 被引量:2
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作者 Yiyi Zhu Qianpeng Zhang +2 位作者 Lei Shu Daquan Zhang Zhiyong Fan 《Journal of Semiconductors》 EI CAS CSCD 2021年第10期93-102,共10页
Flexible solar cells are important photovoltaics(PV)technologies due to the reduced processing temperature,less material consumption and mechanical flexibility,thus they have promising applications for portable device... Flexible solar cells are important photovoltaics(PV)technologies due to the reduced processing temperature,less material consumption and mechanical flexibility,thus they have promising applications for portable devices and building-integrated applications.However,the efficient harvesting of photons is the core hindrance towards efficient,flexible PV.Light management by nanostructures and nanomaterials has opened new pathways for sufficient solar energy harvesting.Nanostructures on top surfaces provide an efficient pathway for the propagation of light.Aside from suppressing incident light reflection,micro-structured back-reflectors reduce transmission via multiple reflections.Nanostructures themselves can be the absorber layer.Photovoltaics based on high-crystallinity nanostructured light absorbers demonstrate enhanced power conversion efficiency(PCE)and excellent mechanical flexibility.To acquire a deep understanding of the impacts of nanostructures,herein,a concise overview of the recent development in the design and application of nanostructures and nanomaterials for photovoltaics is summarized. 展开更多
关键词 solar cells NANOTECHNOLOGY ANTIREFLECTION bendability PCE
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Effects of quenching and over-aging temperatures on mechanical properties of ultra-high strength cold-rolled martensite steels 被引量:1
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作者 ZHANG Hanlong ZHU Xiaodong XUE Peng 《Baosteel Technical Research》 CAS 2019年第1期1-8,共8页
As cold-formed steel has the highest strength-to-weight ratio of any material,ultra-high strength martensitic steel is attracting great interest from global car manufacturers. This paper explores the effects of the qu... As cold-formed steel has the highest strength-to-weight ratio of any material,ultra-high strength martensitic steel is attracting great interest from global car manufacturers. This paper explores the effects of the quenching and over-aging temperatures on the strength and cold bendability of C-Mn-Si martensitic steel. Due to its high carbon content,water-quenched C-Mn-Si martensitic steel has high hardenability and can obtain ultra-high tensile strength and uniform martensitic morphology when the water-quenching temperature is higher than 710 ℃.Increasing the over-aging temperature of this experimental steel decreases its tensile strength,increases the total elongation,and first increases then decreases the yield point until reaching a peak at 180 ℃. Besides,when increasing the over-aging temperature,the bendability of this experimental steel initially improves and then decreases,and reaches its optimal bendability at an over-aging temperature of 180 ℃. Based on SEM characterization and a microhardness distribution analysis,the over-aging temperatures were found to affect the size of the carbides and differences in the microhardness of the experimental steel. Therefore,they have significant influence on bendability. 展开更多
关键词 martensitic steel ANNEALING bendability
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The relevance of Niobium microalloying in dual phase steels with optimized mechanical properties
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作者 Hardy MOHRBACHER 《Baosteel Technical Research》 CAS 2010年第S1期47-,共1页
Dual phase steel is nowadays widely applied in automotive construction as hot rolled and cold rolled HDG grades.The strength and elongation of DP steels are principally determined by the ratio of ferrite and martenist... Dual phase steel is nowadays widely applied in automotive construction as hot rolled and cold rolled HDG grades.The strength and elongation of DP steels are principally determined by the ratio of ferrite and marteniste in the microstructure.However,for practical forming in the press shop additional properties are important such as bendability and hole expansion ratio.These characteristics relate to the morphology and distribution of the phases in the microstructure.Niobium microalloying can influence not only the strength of DP steels but also particularly the phase morphology and homogeneity leading to significant improvement of the mechanical properties.The paper will show processing strategies involving Nb microalloying in DP steel production.The metallurgical mechanisms induced by Nb are discussed.This is also related to damage mechanisms occurring in DP steel during forming or application.Particularly the issue of delayed fracturing in ultra high strength DP steel will be addressed. 展开更多
关键词 grain refinement intercritical annealing phase distribution delayed cracking hole expansion bendability
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Bendable tube-shaped supercapacitor based on reduced graphene oxide and Prussian blue coated carbon fiber yarns for energy storage 被引量:4
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作者 Mohd.Khalid Ana M.B.Honorato 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2018年第3期866-873,共8页
Carbon fiber yarns(CFY) are promising as a new type of flexible building blocks for the construction of flexible architectures for the energy storage applications. The main hurdle with CFY is how to make them high e... Carbon fiber yarns(CFY) are promising as a new type of flexible building blocks for the construction of flexible architectures for the energy storage applications. The main hurdle with CFY is how to make them high energy and power capable by using economically and environmentally viable materials. Here,we report reduced graphene oxide(r GO) and Prussian blue(PB) coated CFY, derived from a facile electrochemical process at room temperature for supercapacitor electrodes. The PB coated CFY and r GO coated CFY electrodes exhibit the excellent gravimetric capacitance of 339 F/g and 160.2 F/g, respectively, in aqueous KCl electrolyte in three-electrode cell configuration. When we coupled these electrodes inside the flexible plastic tube and separated by the electrolyte wet filter paper in order to construct flexible architecture, the resulting device delivers excellent specific energy of 52.1 Wh/kg and 26.5 Wh/kg with offering specific power of 3100 W/kg and 14400 W/kg respectively, under a wide operating potential of1.8 V with excellent rate capability. The device shows high tolerance towards bending, and retained its efficiency to the capacitance after being bent at an angle of 360° for 200 bending cycles. 展开更多
关键词 Carbon fiber yarns Bendable supercapacitor Energy density Power density
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High-Quality Bi_2Te_3 Single Crystalline Films on Flexible Substrates and Bendable Photodetectors
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作者 刘雨从 陈嘉栋 +3 位作者 邓惠勇 胡古今 陈效双 戴宁 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第10期136-140,共5页
Recently, great efforts have been made in the fabrication of arbitrary warped devices to satisfy the requirement of wearable and lightweight electronic products. Direct growth of high crystalline quality films on flex... Recently, great efforts have been made in the fabrication of arbitrary warped devices to satisfy the requirement of wearable and lightweight electronic products. Direct growth of high crystalline quality films on flexible substrates is the most desirable method to fabricate flexible devices owing to the advantage of simple and compatible preparation technology with current semiconductor devices, while it is a very challenging work, and usually amorphous, polycrystalline or discontinuous single crystalline films are achieved. Here we demonstrate the direct growth of high-quality Bi2 Te3 single crystalline films on flexible polyimide substrates by the modified hot wall epitaxy technique. Experimental results reveal that adjacent crystallites are coherently coalesced to form a continuous film, although amounts of disoriented crystallites are generated due to fast growth rate. By inserting a quartz filter into the growth tube, the number density of disoriented crystallites is effectively reduced owing to the improved spiral interaction. Furthermore, flexible Bi2 Te3 photoconductors are fabricated and exhibit strong near-infrared photoconductive response under different degrees of bending, which also confirms the obtained fexible films suitable for electronic applications. 展开更多
关键词 of Te is High-Quality Bi2Te3 Single Crystalline Films on Flexible Substrates and Bendable Photodetectors that in BI for on flexible
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Flexible head-following motion planning for scalable and bendable continuum robots
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作者 Te Li Guoqing Zhang +3 位作者 Xinyuan Li Xu Li Haibo Liu Yongqing Wang 《Biomimetic Intelligence & Robotics》 EI 2024年第2期86-96,共11页
Continuum robots,which are characterized by high length-to-diameter ratios and flexible structures,show great potential for various applications in confined and irregular environments.Due to the combination of motion ... Continuum robots,which are characterized by high length-to-diameter ratios and flexible structures,show great potential for various applications in confined and irregular environments.Due to the combination of motion modes,the existence of multiple solutions,and the presence of complex obstacle constraints,motion planning for these robots is highly challenging.To tackle the challenges of online and flexible operation for continuum robots,we propose a flexible head-following motion planning method that is suitable for scalable and bendable continuum robots.Firstly,we establish a piecewise constant curvature(PCC)kinematic model for scalable and bendable continuum robots.The article proposes an adaptive auxiliary points model and a method for updating key nodes in head-following motion to enhance the precise tracking capability for paths with different curvatures.Additionally,the article integrates the strategy for adjusting the posture of local joints of the robot into the head-following motion planning method,which is beneficial for achieving safe obstacle avoidance in local areas.The article concludes by presenting the results of multiple sets of motion simulation experiments and prototype experiments.The study demonstrates that the algorithm presented in this paper effectively navigates and adjusts posture to avoid obstacles,meeting the real-time demands of online operations.The average time for a single-step solution is 4.41×10^(-5) s,and the average tracking accuracy forcircular paths is 7.8928mm. 展开更多
关键词 Continuum robot Motion planning Scalable and bendable Head-following
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NOR logic function of a bendable combination of tunneling field-effect transistors with silicon nanowire channels 被引量:1
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作者 Yoonjoong Kim Youngin Jeon +1 位作者 Minsuk Kim Sangsig Kim 《Nano Research》 SCIE EI CAS CSCD 2016年第2期499-506,共8页
In this study, we propose a novel combination of tunneling field-effect transistors (TFETs) with asymmetrically doped p^+-i-n^+ silicon nanowire (SiNW) channels on a bendable substrate. The combination of two n-... In this study, we propose a novel combination of tunneling field-effect transistors (TFETs) with asymmetrically doped p^+-i-n^+ silicon nanowire (SiNW) channels on a bendable substrate. The combination of two n-channel SiNW-TFETs (NWTFETs) in parallel and two p-channel NWTFETs in series operates as a two-input NOR logic gate. The component NWTFETs with the n- and p-channels exhibit subthreshold swings (SSs) of 69 and 53 mV·dec^-1, respectively, and the on/off current ratios are -106. The NOR logic operation is sustainable and reproducible for up to 1,000 bending cycles with a narrow transition width of -0.26 V. The mechanical bendability of the bendable NWTFETs shows that they are stable and have good fatigue properties. To the best of our knowledge, this is the first study on the electrical and mechanical characteristics of a bendable NOR logic gate composed of NWTFETs. 展开更多
关键词 silicon nanowire array field-effect transistor TUNNELING NOR logic gate bendable substrate
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Low-power functionality of silicon-nanowire-assembled inverters on bendable plastics
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作者 Youngin Jeon Myeongwon Lee +2 位作者 Minsuk Kim Yoonjoong Kim Sangsig Kim 《Nano Research》 SCIE EI CAS CSCD 2016年第5期1409-1417,共9页
In this paper, we demonstrate the low-power functionality of silicon nanowire (SiNW)-assembled inverters on bendable plastics. Our bendable inverters are capable of operating at supply voltages as low as 0.8 V with ... In this paper, we demonstrate the low-power functionality of silicon nanowire (SiNW)-assembled inverters on bendable plastics. Our bendable inverters are capable of operating at supply voltages as low as 0.8 V with a switching (or standby) power consumption of -0.2 nW (or -6.6 pW). The low-power inverting operation with a voltage gain of -18 is attributable to the near-ideal characteristics of the component transistors that have selectively thinned SiNW channels and exhibit low, symmetrical threshold voltages of 0.40 and -0.39 V and low subthreshold swing values of 81 and 65 mV/dec. Moreover, mechanical bendability reveals that the inverting operation has good, stable fatigue properties. 展开更多
关键词 silicon nanowire inverter low-power functionality bendable electronics
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Silicon nanowire CMOS NOR logic gates featuring onevolt operation on bendable substrates
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作者 Jeongje Moon Yoonjoong Kim +1 位作者 Doohyeok Lim Sangsig Kim 《Nano Research》 SCIE EI CAS CSCD 2018年第5期2625-2631,共7页
In this study, we propose complementary metal-oxide-semiconductor (CMOS) NOR logic gates consisting of silicon nanowire (NW) arrays on bendable substrates. A circuit consisting of two p-channel NW field-effect tra... In this study, we propose complementary metal-oxide-semiconductor (CMOS) NOR logic gates consisting of silicon nanowire (NW) arrays on bendable substrates. A circuit consisting of two p-channel NW field-effect transistors (NWFETs) in series and two n-channel NWFETs in parallel is constructed to operate a two- input CMOS NOR logic gate. The NOR logic gates operate at a low supply voltage of 1 V with a rail-to-rail logic swing and a high voltage gain of approximately -3.0. The exact NOR logic functionality is achieved owing to the superior electrical characteristics of the well-aligned p- and n-NWFETs, which are obtained using conventional Si-based CMOS technology. Moreover, the NOR logic gates exhibit stable characteristics and have good mechanical properties. The proposed bendable NW CMOS NOR logic gates are promising building blocks for future bendable integrated electronics. 展开更多
关键词 field-effect transistor silicon nanowire NOR logic gate bendable substrate
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Nanowatt power operation of silicon nanowire NAND logic gates on bendable substrates
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作者 Junggwon Yun Myeongwon Lee +4 位作者 Youngin Jeon Minsuk Kim Yoonjoong Kim Doohyeok Lim Sangsig Kim 《Nano Research》 SCIE EI CAS CSCD 2016年第12期3656-3662,共7页
In this paper, we propose a novel construction of silicon nanowire (SiNW) negative-AND (NAND) logic gates on bendable plastic substrates and describe their electrical characteristics. The NAND logic gates with SiN... In this paper, we propose a novel construction of silicon nanowire (SiNW) negative-AND (NAND) logic gates on bendable plastic substrates and describe their electrical characteristics. The NAND logic gates with SiNW channels are capable of operating with a supply voltage as low as 0.8 V, with switching and standby power consumption of approximately 1.1 and 0.068 nW, respectively. Superior electrical characteristics of each SiNW transistor, including steep subthreshold slopes, high Ion/off ratio, and symmetrical threshold voltages, are the major factors that enable nanowatt-range power operation of the logic gates. Moreover, the mechanical bendability of the logic gates indicates that they have good and stable fatigue properties. 展开更多
关键词 negative-AND (NAND)logic gates bendable electronics silicon nanowires nanowatt operation
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Silicon nanowire ratioed inverters on bendable substrates
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作者 Jeongje Moon Yoonjoong Kim +2 位作者 Doohyeok Lim Kyeungmin Im Sangsig Kim 《Nano Research》 SCIE EI CAS CSCD 2018年第5期2586-2591,共6页
In this study, we demonstrate the performance of silicon nanowire (SiNW) n-metal oxide semiconductor (MOS) and p-MOS ratioed inverters that are fabricated on bendable substrates. The electrical characteristics of ... In this study, we demonstrate the performance of silicon nanowire (SiNW) n-metal oxide semiconductor (MOS) and p-MOS ratioed inverters that are fabricated on bendable substrates. The electrical characteristics of the fabricated devices can be controlled by adjusting the load voltage. The logic swings of the n- and p-MOS ratioed inverters at a low supply voltage of 1V are 80% and 96%, respectively. The output voltage level of the p-MOS ratioed inverter is close to rail-to-rail operation. The device also exhibits stable characteristics with good fatigue properties. Our bendable SiNW ratioed inverters show promise as a candidate building block for future bendable electronics. 展开更多
关键词 silicon nanowire ratioed inverter n-metal oxide semicon-ductor (MOS) inverter p-MOS inverter bendable substrate
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