期刊文献+
共找到49篇文章
< 1 2 3 >
每页显示 20 50 100
Photodetector based on Ruddlesden-Popper perovskite microwires with broader band detection
1
作者 Yongxu Yan Zhexin Li Zheng Lou 《Journal of Semiconductors》 EI CAS CSCD 2023年第8期41-47,共7页
Recently,the two-dimensional(2D)form of Ruddlesden-Popper perovskite(RPP)has been widely studied.However,the synthesis of one-dimensional(1D)RPP is rarely reported.Here,we fabricated a photodetector based on RPP micro... Recently,the two-dimensional(2D)form of Ruddlesden-Popper perovskite(RPP)has been widely studied.However,the synthesis of one-dimensional(1D)RPP is rarely reported.Here,we fabricated a photodetector based on RPP microwires(RPP-MWs)and compared it with a 2D-RPP photodetector.The results show that the RPP-MWs photodetector possesses a wider photoresponse range and higher responsivities of 233 A/W in the visible band and 30 A/W in the near-infrared(NIR)band.The analyses show that the synthesized RPP-MWs have a multi-layer,heterogeneous core-shell structure.This structure gives RPP-MWs a unique band structure,as well as abundant trap states and defect levels,which enable them to acquire better photoresponse performance.This configuration of RPP-MWs provides a new idea for the design and application of novel heterostructures. 展开更多
关键词 Ruddlesden-Popper perovskite microwireS PHOTODETECTOR CORE-SHELL HETEROJUNCTION
下载PDF
Preparation and photodetection performance of high crystalline quality and large size β-Ga_(2)O_(3)microwires
2
作者 Yuefei Wang Yurui Han +5 位作者 Chong Gao Bingsheng Li Jiangang Ma Haiyang Xu Aidong Shen Yichun Liu 《Journal of Semiconductors》 EI CAS CSCD 2023年第6期75-79,共5页
Ultrawide band gap semiconductors are promising solar-blind ultraviolet(UV)photodetector materials due to their suitable bandgap,strong absorption and high sensitivity.Here,β-Ga_(2)O_(3)microwires with high crystal q... Ultrawide band gap semiconductors are promising solar-blind ultraviolet(UV)photodetector materials due to their suitable bandgap,strong absorption and high sensitivity.Here,β-Ga_(2)O_(3)microwires with high crystal quality and large size were grown by the chemical vapor deposition(CVD)method.The microwires reach up to 1 cm in length and were single crystalline with low defect density.Owing to its high crystal quality,a metal–semiconductor–metal photodetector fabricated from a Ga_(2)O_(3)microwire showed a responsivity of 1.2 A/W at 240 nm with an ultrahigh UV/visible rejection ratio(R_(peak)/R_(400 nm))of 5.8×10^(5),indicating that the device has excellent spectral selectivity.In addition,no obvious persistent photoconductivity was observed in the test.The rise and decay time constants of the device were 0.13 and 0.14 s,respectively.This work not only provides a growth method for high-quality Ga_(2)O_(3)microwires,but also demonstrates the excellent performance of Ga_(2)O_(3)microwires in solar-blind ultraviolet detection. 展开更多
关键词 solar-blind photodetector β-Ga_(2)O_(3) microwire
下载PDF
A novel and facile wet-chemical method for synthesis of silver microwires 被引量:6
3
作者 翟爱霞 蔡雄辉 +1 位作者 姜晓晔 范国枝 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第4期943-948,共6页
A novel and facile wet-chemical method for synthesis of silver microwires was developed.The well-defined particles were prepared by adding an iron(Ⅱ) sulfate heptahydrate solution into a silver nitrate solution con... A novel and facile wet-chemical method for synthesis of silver microwires was developed.The well-defined particles were prepared by adding an iron(Ⅱ) sulfate heptahydrate solution into a silver nitrate solution containing citric acid drop by drop at 50 °C.The resulting products were characterized by scanning electron microscopy and X-ray diffraction.It was found that the particles consisted of numerous silver microwires.The reaction temperature greatly affected the morphologies of the as-prepared particles.Both of the mean length and width of the silver microwires increased with the decrease of the concentration of silver nitrate.And the lower concentration was unfavorable for the formation of more silver microwires.Similar findings were also observed when the concentration of iron(Ⅱ) sulfate was decreased.The amount of citric acid also greatly affected the shape of the as-prepared particles.It was concluded that citric acid was the key role in the formation of silver microwires via the Oswald ripening mechanism. 展开更多
关键词 silver microwires iron(Ⅱ) sulfate heptahydrate citric acid wet-chemical method
下载PDF
MICROWIRE总线与SPI总线的接口设计与应用 被引量:3
4
作者 罗宏浩 刘少克 《计算机测量与控制》 CSCD 2004年第3期278-279,286,共3页
MICROWIRE总线与SPI总线是目前应用非常广泛的两种同步串行总线,由于两种总线协议的不完全兼容性,造成许多设备之间无法进行通信。通过对PIC16F73单片机的SPI串口时序和电机控制专用芯片SA866的MICROWIRE串口时序的研究,给出了正确配置... MICROWIRE总线与SPI总线是目前应用非常广泛的两种同步串行总线,由于两种总线协议的不完全兼容性,造成许多设备之间无法进行通信。通过对PIC16F73单片机的SPI串口时序和电机控制专用芯片SA866的MICROWIRE串口时序的研究,给出了正确配置SPI模式的方法,并通过软件的转换控制,成功解决了SPI与MICROWIRE两种不同协议之间相互通信的问题。 展开更多
关键词 microwire总线 SPI总线 串行通信 单片机 接口
下载PDF
Magnetocaloric effect in Ni-Mn-In-Co microwires prepared by Taylor-Ulitovsky method 被引量:1
5
作者 张学习 苗生沛 孙剑飞 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第10期3152-3157,共6页
Ni-Mn-In-Co microwires with diameter of 30-100 μm are prepared by glass-coated metal filaments(Taylor–Ulitovsky) method. The effects of magnetic field on martensite transformation temperature in the as-prepared an... Ni-Mn-In-Co microwires with diameter of 30-100 μm are prepared by glass-coated metal filaments(Taylor–Ulitovsky) method. The effects of magnetic field on martensite transformation temperature in the as-prepared and annealed microwires are investigated using a physical property measurement system(PPMS). Magnetocaloric effect(MCE) attributed to field-induced austenite transformation in the as-prepared and annealed microwires is analyzed indirectly from the isothermal magnetization(M-B) curves. The as-prepared microwire has a 7-layer modulated martensite structure(7M) at room temperature. The changes of austenite starting temperature induced by an external magnetic field(ΔAs/ΔB) in the as-prepared and annealed microwires are-1.6 and-4 K/T, respectively. Inverse martensite to austenite transformation exists in annealed microwires when an external magnetic field is applied at temperatures near As. The entropy change(ΔS) obtained in the annealed microwires is 3.0 J/(kg·K), which is much larger than that in the as-prepared microwires 0.5 J/(kg·K). The large entropy change and low price make Ni-Mn-In-Co microwires a potential working material in magnetic refrigeration. 展开更多
关键词 magnetic shape memory alloys microwireS martensitic transformation magnetocaloric effect magnetization curve
下载PDF
Annealing effects on the microwave permittivity and permeability properties of Fe_(79)Si_(16)B_5 microwires and their microwave absorption performances 被引量:3
6
作者 韩满贵 欧雨 +1 位作者 梁迪飞 邓龙江 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第3期1261-1265,共5页
This paper reports that amorphous magnetic microwires (Fe79Si16Bs) have been fabricated by a melt-extraction technique and have been annealed at 600℃ and 750℃ respectively. Differential scanning calorimeter measur... This paper reports that amorphous magnetic microwires (Fe79Si16Bs) have been fabricated by a melt-extraction technique and have been annealed at 600℃ and 750℃ respectively. Differential scanning calorimeter measurements show that nanocrystalline magnetic phase (α-Fe) has been formed in the amorphous matrix when it was annealed at 600℃. Hard magnetic phase (Fe2B) was formed in the microwires annealed at 750℃, which increases the magnetic coercivity. Microwave permittivity and permeability are found to be dependent on the microstruetures. The permittivity fitting results show that multi Lorentzian dispersion processes exist. For microwires annealed at 750℃, their resonance peaks due to the domain wall movements and natural resonance are found higher than those of microwires annealed at 600℃. The microwave absorption performance of microwires annealed at 600℃ is found better than microwires annealed at 750℃. 展开更多
关键词 amorphous magnetic microwires magnetic permeability PERMITTIVITY microwave absorber
下载PDF
Three-Dimensional Metacomposite Based on Different Ferromagnetic Microwire Spacing for Electromagnetic Shielding 被引量:4
7
作者 QIAO Ye JIANG Qian +2 位作者 UDDIN Azim QIN Faxiang WU Liwei 《Journal of Donghua University(English Edition)》 CAS 2022年第3期206-210,共5页
An electromagnetic shielding metacomposite based on the absorbing mechanism was prepared by weaving ferromagnetic microwires into the three-dimensional(3D)fabric.The influence of the ferromagnetic microwire spacing on... An electromagnetic shielding metacomposite based on the absorbing mechanism was prepared by weaving ferromagnetic microwires into the three-dimensional(3D)fabric.The influence of the ferromagnetic microwire spacing on electromagnetic shielding performance and the electromagnetic shielding mechanism of 3D metacomposites were studied.The total electromagnetic shielding performance increases with the increase of electromagnetic wave frequency.3D metacomposites based on the absorbing mechanism can avoid the secondary pollution of electromagnetic waves,and have great potential in military,civil,aerospace and other fields. 展开更多
关键词 three-dimensional(3D)metacomposite ferromagnetic microwire spacing electromagnetic shielding MECHANISM
下载PDF
Room temperature non-balanced electric bridge ethanol gas sensor based on a single ZnO microwire 被引量:1
8
作者 Yun-Zheng Li Qiu-Ju Feng +3 位作者 Bo Shi Chong Gao De-Yu Wang Hong-Wei Liang 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第1期463-468,共6页
In this paper,ultra-long and large-scaled ZnO microwire arrays are grown by the chemical vapor deposition method,and a single ZnO microwire-based non-balanced electric bridge ethanol gas sensor is fabricated.The exper... In this paper,ultra-long and large-scaled ZnO microwire arrays are grown by the chemical vapor deposition method,and a single ZnO microwire-based non-balanced electric bridge ethanol gas sensor is fabricated.The experimental results show that the gas sensor has good repeatability,high response rate,short response,and recovery time at room temperature(25℃).The response rate of the gas sensor exposed to 90-ppm ethanol is about 93%,with a response time and recovery time are 0.3 s and 0.7 s respectively.As a contrast,the traditional resistive gas sensor of a single ZnO microwire shows very small gas response rate.Therefore,ethanol gas sensor based on non-balanced electric bridge can obviously enhance gas sensing characteristics,which provides a feasible method of developing the high performance ZnO-based gas sensor. 展开更多
关键词 ZnO microwire gas sensor room temperature ETHANOL
下载PDF
Effect of annealing treatments on the microwave electromagnetic properties of amorphous FeCuNbSiB microwires 被引量:1
9
作者 梁迪飞 韩满贵 +1 位作者 鄢波 邓龙江 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第2期542-547,共6页
The amorphous FeCuNbSiB microwires are fabricated by using the melt extraction method and annealed separately at temperatures T = 573, 673, 723 and 773K for lh. The effect of annealing treatment on the microwaw electr... The amorphous FeCuNbSiB microwires are fabricated by using the melt extraction method and annealed separately at temperatures T = 573, 673, 723 and 773K for lh. The effect of annealing treatment on the microwaw electromagnetic properties of FeCuNbSiB wires/wax composites has been investigated for the first time. It is found that in a frequency range of 0.5-4.0 GHz, the complex permittivity, permeability, magnetic and electric loss tangents of FeCuNbSiB wires/wax composites are strongly dependent on the annealing temperature and frequency. For T = 573, 723 and 773K, two resonance peaks are found at frequency f = 1.2 and 3.3GHz. However, for T = 673K, only one resonance peak occurs at f = 3.3 GHz. The resonance peak at f = 1.2 GHz is believed to be due to the stress-induced anisotropy, while the resonance peak at f = 3.3 GHz is attributed to the random anisotropy. 展开更多
关键词 amorphous alloys PERMEABILITY PERMITTIVITY microwireS
下载PDF
Microwire formation based on dielectrophoresis of electroless gold plated polystyrene microspheres 被引量:1
10
作者 姜洪源 任玉坤 陶冶 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第5期401-408,共8页
Microspheres coated with a perfectly conductive surface have many advantages in the applications of biosensors and micro-electromechanical systems. Polystyrene microspheres with the diameter of 10 μm were coated with... Microspheres coated with a perfectly conductive surface have many advantages in the applications of biosensors and micro-electromechanical systems. Polystyrene microspheres with the diameter of 10 μm were coated with a 50 nmthick gold layer using an electroless gold plating approach. Dielectrophoresis (DEP) for bare microspheres and shelled microspheres was theoretically analysed and the real part of the Clausius Mossotti factor was calculated for the two kinds of microspheres. The experiments on the dielectrophoretic characterisation of the uncoated polystyrene microspheres and gold coated polystyrene microspheres (GCPMs) were carried out. Experimental results showed that the gold coated polystyrene microspheres were only acted by a positive dielectrophoretic force when the frequency was below 40M Hz, while the uncoated polystyrene microspheres were governed by a negative dielectrophoretic force in this frequency range. The gold coated polystyrene microspheres were exploited to form the rnicrowire automatically according to their stable dielectrophoretic and electric characterisations. 展开更多
关键词 dielectrophoresis gold coated polystyrene microspheres microwire
下载PDF
Dielectrophoretic force distribution of growing microwires 被引量:1
11
作者 胡陈果 《Journal of Chongqing University》 CAS 2003年第2期46-50,共5页
The Dielectropheretic assembly of electrically functional microwires from nanopartical suspensions is introduced. Meanwhile growth mechanism of the microwires is discussed. The agglomeration is based on the polarizati... The Dielectropheretic assembly of electrically functional microwires from nanopartical suspensions is introduced. Meanwhile growth mechanism of the microwires is discussed. The agglomeration is based on the polarization and mobility of particles caused by alternating electric fields, commonly referred to as dielectrophoresis (DEP). The spatial distributions of the electric potential, field and dieletrophoretic force are analytically calculated in terms of AC electrokinetics. The calculated results show that the electrophoretic force, very strong near the apex of the microwire, drops abruptly with increasing distance. The electrophoretic force near the apex of the microwire agrees well with the fact that the nanoparticles are highly concentrated at the end of the tip and subsequently aggregate to extend the wire in the direction of the field gradient. 展开更多
关键词 microwire electrophoretic force NANOPARTICLES ASSEMBLY
下载PDF
MICROWIRE串行接口
12
作者 赵燕红 《电声技术》 北大核心 1998年第2期20-24,共5页
MICROWIRE是一种简单的三线串行通讯接口。在COPS系列单片机控制器与外围设备间进行符合标准化协议的串行通讯。本文主要是对MICROWIRE串行接口的逻辑操作和软、硬件作一简单介绍。
关键词 串行接口 接口装置 microwire
下载PDF
MICROWIRE/RLUS总线在MCS-51系列单片机中的实现及应用
13
作者 欧勇恒 魏国珩 《海军工程大学电子工程学院学报》 2001年第3期27-31,共5页
本文介绍了目前单片机应用中较为流行的串行同步外围接口MICROWIRE/RLUS,并以AT89C51单片机控制某语音信号处理芯片为例,给出了使用MCS-51系列单片机模拟MICROWIRE/RLUS总线与语音信号处理芯片通信的程序。
关键词 串行传输总线 microwire/RLUS 单片机 微机
下载PDF
Boosting the performance of crossed ZnO microwire UV photodetector by mechanical contact homo-interface barrier
14
作者 Yinzhe Liu Kewei Liu +8 位作者 Jialin Yang Zhen Cheng Dongyang Han Qiu Ai Xing Chen Yongxue Zhu Binghui Li Lei Liu Dezhen Shen 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第10期256-260,共5页
One-dimensional(1D)micro/nanowires of wide band gap semiconductors have become one of the most promising blocks of high-performance photodetectors.However,in the axial direction of micro/nanowires,the carriers can tra... One-dimensional(1D)micro/nanowires of wide band gap semiconductors have become one of the most promising blocks of high-performance photodetectors.However,in the axial direction of micro/nanowires,the carriers can transport freely driven by an external electric field,which usually produces large dark current and low detectivity.Here,an UV photodetector built from three cross-intersecting ZnO microwires with double homo-interfaces is demonstrated by the chemical vapor deposition and physical transfer techniques.Compared with the reference device without interface,the dark current of this ZnO double-interface photodetector is significantly reduced by nearly 5 orders of magnitude,while the responsivity decreases slightly,thereby greatly improving the normalized photocurrent-to-dark current ratio.In addition,ZnO double-interface photodetector exhibits a much faster response speed(~0.65 s)than the no-interface device(~95 s).The improved performance is attributed to the potential barriers at the microwire-microwire homo-interfaces,which can regulate the carrier transport.Our findings in this work provide a promising approach for the design and development of high-performance photodetectors. 展开更多
关键词 ZnO microwire INTERFACE potential barrier dark current photocurrent-to-dark current ratio
下载PDF
Effect of chemical ordering annealing on superelasticity of Ni-Mn-Ga-Fe ferromagnetic shape memory alloy microwires
15
作者 Yanfen Liu Xuexi Zhang +5 位作者 Hongxian Shen Jianfei Sun Qinan Li Xiaohua Liu Jianjun Li Weidong Cheng 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第5期414-419,共6页
Ni50Mn25Ga20Fe5 ferromagnetic shape memory alloy microwires with diameters of^30-50μm and grain sizes of^2-5μm were prepared by melt-extraction technique.A step-wise chemical ordering annealing was carried out to im... Ni50Mn25Ga20Fe5 ferromagnetic shape memory alloy microwires with diameters of^30-50μm and grain sizes of^2-5μm were prepared by melt-extraction technique.A step-wise chemical ordering annealing was carried out to improve the superelasticity strain and recovery ratio which were hampered by the internal stress,compositional inhomogeneity,and high-density defects in the as-extracted Ni50Mn25Ga20Fe5 microwires.The annealed microwires exhibited enhanced atomic ordering degree,narrow thermal hysteresis,and high saturation magnetization under a low magnetic field.As a result,the annealed microwire showed decreased superelastic critical stress,improved reversibility,and a high superelastic strain(1.9%)with a large recovery ratio(>96%).This kind of filamentous material with superior superelastic effects may be promising materials for minor-devices. 展开更多
关键词 Ni-Mn-Ga-Fe microwire chemical ordering annealing martensite transformation SUPERELASTICITY
下载PDF
Nanodots and microwires of ZrO_2 grown on LaAlO_3 by photo-assisted metal–organic chemical vapor deposition
16
作者 郭峰 汪薪生 +3 位作者 庄仕伟 李国兴 张宝林 周本初 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第2期510-516,共7页
ZrO_2 nanodots are successfully prepared on LaAlO_3(LAO)(100) substrates by photo-assisted metal-organic chemical vapor deposition(MOCVD). It is indicated that the sizes and densities of ZrO_2 nanodots are contr... ZrO_2 nanodots are successfully prepared on LaAlO_3(LAO)(100) substrates by photo-assisted metal-organic chemical vapor deposition(MOCVD). It is indicated that the sizes and densities of ZrO_2 nanodots are controllable by modulating the growth temperature, oxygen partial pressure, and growth time. Meanwhile, the microwires are observed on the surfaces of substrates. It is found that there is an obvious competitive relationship between the nanodots and the microwires. In a growth temperature range from 500℃ to 660℃, the microwires turn longest and widest at 600℃, but in contrast, the nanodots grow into the smallest diameter at 600℃. This phenomenon could be illustrated by the energy barrier, decomposition rate of Zr(tmhd)_4, and mobility of atoms. In addition, growth time or oxygen partial pressure also affects the competitive relationship between the nanodots and the microwires. With increasing oxygen partial pressure from 451 Pa to 75_2 Pa,the microwires gradually grow larger while the nanodots become smaller. To further achieve the controllable growth, the coarsening effect of ZrO_2 is modified by varying the growth time, and the experimental results show that the coarsening effect of microwires is higher than that of nanodots by increasing the growth time to quickly minimize ZrO_2 energy density. 展开更多
关键词 ZRO2 photo-assisted MOCVD NANODOTS microwireS
下载PDF
Fabrication of crystalline selenium microwire
17
作者 彭帅 唐国武 +6 位作者 孙敏 刘旺旺 单秀杰 钱奇 陈东丹 张勤远 杨中民 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第4期472-475,共4页
A method of fabricating selenium(Se) microwire is demonstrated.A multimaterial fiber with amorphous selenium(a-Se) core and multicomponent phosphate glass cladding is drawn by using a conventional optical fiber dr... A method of fabricating selenium(Se) microwire is demonstrated.A multimaterial fiber with amorphous selenium(a-Se) core and multicomponent phosphate glass cladding is drawn by using a conventional optical fiber drawing technique.Then the a-Se core of the fiber is crystallized by a post thermal process at 150 ℃.After the multicomponent phosphate glass cladding is stripped from the multimaterial fiber by marinating the fiber in HF acid solution,a crystalline selenium(c-Se)microwire with high uniformity and smooth surface is obtained.Based on microstructure measurements,the c-Se microwire is identified to consist of most hexagonal state particles and very few trigonal state whiskers.The good photoconduction property of c-Se microwire with high quality and longer continuous length makes it possible to apply to functional devices and arrays. 展开更多
关键词 selenium semiconductor crystalline microwires optical fiber technology photoconductivity ma-terials
下载PDF
Micromagnetic Structure of Co-Rich Amorphous Microwires
18
作者 E.E.Shalyguina and L.M.Bekoeva (Physical Faculty, Moscow State University, 119899, Moscow, Russia) Kyung-Ho Shin (Korea Institute of Science & Technology , P.O. Box 131, Cheongryang, Seoul 130-650, Korea) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2000年第2期183-185,共3页
Results on the magneto-optical investigation of near-surface micromagnetic structure (MMS) of Co69Fe4Si12B15 amorphous wires 10~50 μm in diameter are presented. The wires were prepared by the rapid solidification te... Results on the magneto-optical investigation of near-surface micromagnetic structure (MMS) of Co69Fe4Si12B15 amorphous wires 10~50 μm in diameter are presented. The wires were prepared by the rapid solidification technique. The magnetic field H was applied along or perpendicular to the wire length. By scanning the light spot of 1 μm-diameter along the wire length, distributions of magnetization components (both parallel and perpendicular to the applied magnetic field) and also local hysteresis characteristics of the wires were measured. It was experimentally established that owing to the compressive stresses from quenching coupled with negative magnetostriction of Co-rich amorphous materials, the examined microwires have a circumferential magnetic anisotropy. In consequence, there are the near-surface alternate left- and right-handled circular domains in these samples. The dependencies of the circular domain width on the wire diameter and length were found. It was discovered that in the axial magnetic field local hysteresis loops are unhysteretic. It was proved that in this case the dominant mechanism of the wire magnetization reversal is rotation of local magnetization vectors in circular domains. 展开更多
关键词 RICH Micromagnetic Structure of Co-Rich Amorphous microwires MMS
下载PDF
Factors Affecting the Top Stripping of GaAs Microwire Array Fabricated by Inductively Coupled Plasma Etching
19
作者 程滢 邹继军 +5 位作者 万明 王炜路 彭新村 冯林 邓文娟 朱志甫 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第5期150-152,共3页
The effects of different masks and patterns on the top stripping of GaAs microwire arrays fabricated by inductively coupled plasma etching for 20min and 40min are investigated. The results show that the mask layer is ... The effects of different masks and patterns on the top stripping of GaAs microwire arrays fabricated by inductively coupled plasma etching for 20min and 40min are investigated. The results show that the mask layer is the main affect of the top stripping of the GaAs microwires in 40min. Increasing the mask layers and reducing the photoresist layers can prevent top stripping and result in a suitable GaAs microwire array. 展开更多
关键词 SEM Factors Affecting the Top Stripping of GaAs microwire Array Fabricated by Inductively Coupled Plasma Etching
下载PDF
Effects of Strain Rate and Texture on the Tensile Behavior of Pre-strained NiCr Microwires
20
作者 周秀文 QI Yidong +6 位作者 LIU Xudong NIU Gao YANG Bo YANG Yi ZHU Ye YU Bin 吴卫东 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第2期459-465,共7页
The stress–strain behavior and strain rate sensitivity of pre-strained Ni80Cr20(Ni20Cr) were studied at strain rates from 4.8×10^(–4)s^(–1) to 1.1×10^(–1)s^(–1). Specimens were prepared throug... The stress–strain behavior and strain rate sensitivity of pre-strained Ni80Cr20(Ni20Cr) were studied at strain rates from 4.8×10^(–4)s^(–1) to 1.1×10^(–1)s^(–1). Specimens were prepared through cold drawing with abnormal plastic deformation. The texture of the specimen was characterized using electron backscatter diffraction. Results revealed that the ultimate tensile strength and ductility of the pre-strained Ni20Cr microwires simultaneously increased with increasing strain rate. Twinning-induced negative strain rate sensitivity was discovered. Positive strain rate sensitivity was present in fracture flow stress, whereas negative strain rate sensitivity was detected in flow stress values of σ_(0.5%) and σ_(1%). Tensile test of the pre-strained Ni20Cr showed that twinning deformation predominated, whereas dislocation slip deformation dominated when twinning deformation reached saturation. The trends observed in the fractions of 2°-5°, 5°-15°, and 15°-180° grain boundaries confirmed that twinning deformation dominated the first stage. 展开更多
关键词 tensile behavior strain rate sensitivity Ni20Cr microstructure characterization microwire
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部