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Effects of temperature on fracture behavior of Al-based in-situ composites reinforced with Mg_2Si and Si particles fabricated by centrifugal casting 被引量:5
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作者 李波 王开 +3 位作者 刘明翔 薛寒松 朱子宗 刘昌明 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期923-930,共8页
An aluminum-based in-situ composites reinforced with Mg2Si and Si particles were produced by centrifugal casting A1-20Si-5Mg alloy. The microstructure of the composites was examined, and the effects of temperature on ... An aluminum-based in-situ composites reinforced with Mg2Si and Si particles were produced by centrifugal casting A1-20Si-5Mg alloy. The microstructure of the composites was examined, and the effects of temperature on fracture behavior of the composite were investigated. The results show that the average fraction of primary Si and Mg2Si particles in the composites is as high as 38%, and ultimate tensile strengths (UTS) of the composites first increase then decrease with the increase of test temperature. Microstructures of broken specimens show that both the particle fracture and the interface debonding affect the fracture behavior of the composites, and the interface debonding becomes the dominant fracture mechanism with increasing test temperature. Comparative results indicate that rich particles in the composites and excellent interface strength play great roles in enhancing tensile property by preventing the movement of dislocations. 展开更多
关键词 aluminum based in-situ composites fracture behavior centrifugal casting high temperature
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Simulation of the plasticizing behavior of composite modified doublebase(CMDB)propellant in grooved calendar based on adaptive grid technology 被引量:2
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作者 Su-wei Wang Xiu-duo Song +6 位作者 Zong-kai Wu Lei Xiao Guang-pu Zhang Yu-bing Hu Ga-zi Hao Wei Jiang Feng-qi Zhao 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2021年第6期1954-1966,共13页
The frequent occurrence of safety accidents during the calendering process is caused by the flammable and explosive properties of composite modified double-base(CMDB)propellant.Optimization of process parameters with ... The frequent occurrence of safety accidents during the calendering process is caused by the flammable and explosive properties of composite modified double-base(CMDB)propellant.Optimization of process parameters with the aid of fluid simulation technology could effectively ensure the safety of the calendering process.To improve the accuracy of the simulation results,material parameters and model structure were corrected based on actual conditions,and adaptive grid technology was applied in the local mesh refinement.In addition,the rheological behavior,motion trajectories and heat transfer mechanisms of CMDB propellant slurry were studied with different gaps,rotational rates and temperatures of two rollers.The results indicated that the refined mesh could significantly improve the contour clarity of boundaries and simulate the characteristics of CMDB propellant slurry reflux movement caused by the convergent flow near the outlet.Compared with the gap,the increased rotational rate of roller could promote the reflux movement and intensify the shear flow of slurry inside the flow region by viscous shear dragging.Meanwhile,under the synergistic effect of contact heat transfer as well as convective heat exchange,heat accumulated near the outlet and diffused along the reflux movement,which led to the countercurrent heat dissipation behavior of CMDB propellant slurry.The plasticizing mechanism of slurry and the safety of calendering under different conditions were explored,which provided theoretical guidance and reference data for the optimization of calendering process conditions.Based on the simulation results,the safety of the CMDB propellant calendering process could be significantly improved with a few tests conducted during a short research and development cycle. 展开更多
关键词 composite modified double base propellant Calendering process Fluid simulation Vortex flow0
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Features of microstructure and fracture in the transient liquid phase bonded aluminium-based metal matrix composite joints 被引量:3
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作者 孙大谦 刘卫红 +2 位作者 吴建红 贾树盛 邱小明 《China Welding》 EI CAS 2002年第1期9-13,共5页
Transient liquid phase (TLP) bonded aluminium based metal matrix composite (MMC) joints can be classified into three distinct regions, i.e. the particulate segregation region, the denuded particulate region and the ... Transient liquid phase (TLP) bonded aluminium based metal matrix composite (MMC) joints can be classified into three distinct regions, i.e. the particulate segregation region, the denuded particulate region and the base material region. The microstructure of the particulate segregation region consists of alumina particulate and Al alloy matrix with the Al 2Cu and MgAl 2O 4. It contains more and smaller alumina particulates compared with the base material region. The TLP bonded joints have the tensile strength of 150 MPa ~200 MPa and the shear strength of 70 MPa ~100 MPa . With increasing tensile stress, cracks initiate in the particulate segregation region, especially in the particulate/particulate interface and the particulate/matrix interface, and propagate along particulate/matrix interface, througth thin matrix metal and by linking up the close cracks. The particulate segregation region is the weakest during tensile testing and shear testing due to obviously increased proportion of weak bonds (particulate particulate bond and particulate matrix bond). 展开更多
关键词 aluminium based metal matrix composite transient liquid phase bonding MICROSTRUCTURE FRACTURE
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Adhesive Bonding and Self-Curing Characteristics of α-Starch Based Composite Binder for Green Sand Mould/Core 被引量:1
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作者 XiaZHOU JinzongYANG GuohuiQU 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第5期617-621,共5页
Interactions between different components in α-starch based composite binder for green sand mould/core were investigated by using XRD, IR spectra, 1H NMR spectra and SEM. Several adhesive hardening structures and the... Interactions between different components in α-starch based composite binder for green sand mould/core were investigated by using XRD, IR spectra, 1H NMR spectra and SEM. Several adhesive hardening structures and theories of the binder at room temperature were proposed according to the interactions between various compositions. Thus, the reasons for the binder to have excellent combination properties and unique adhesive bonding and self-curing characteristics were explained by these theories successfully. And the theories are of great directive importance to design and development of composite binder for green sand mould/core. 展开更多
关键词 α-Starch based composite binder Interaction Adhesive bonding Self-curing characteristic Green state
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Improvement of Water Sensitivity of Macro-defect-free Cement Based Composites with Cross Coupling Agent 被引量:1
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作者 李北星 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2001年第2期25-30,共6页
The enhancement of interface bonding between cement and polymerand the structural reticula- tion of the water-soluble polymer areproposed to minimize the shortening of the mechanical properties ofmacro-de- fect-free(M... The enhancement of interface bonding between cement and polymerand the structural reticula- tion of the water-soluble polymer areproposed to minimize the shortening of the mechanical properties ofmacro-de- fect-free(MDF)cement based composites at high relativehumidity. The MDF composites incorporated with vari- ouscross-coupling agents studied experimentally. The results show thatthe MDF composites modified with small amounts of cross-couplingagent had raised mechanical properties, but it is more important thatthe modified MDF composites had a significant increase in waterresistance compared to the original one. 展开更多
关键词 macro-defect-free(MDF)cement based composites cross-coupling agent α-alumina
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Spray Atomized and Codeposited Al-Li Based Metal-matrix Composites Processing and Properties 被引量:1
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作者 E. Raskin S. Nayim M.Polak and J.Baram(Materials Engineering Dept., Ben-Gurion University of the Negev, Beer-Sheva, Israel )A.N.Sembira(Nuclear Research Center, Negev, Beer-Sheva, Israel)(To whom correspondence should be addressed) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1995年第5期329-339,共11页
In spray atomization and codeposition, a molten stream of metal is disintegrated into a fine dispersion of droplets by high velocity gas jets. The resulting semi-solidified droplets are directed towards a substrate wh... In spray atomization and codeposition, a molten stream of metal is disintegrated into a fine dispersion of droplets by high velocity gas jets. The resulting semi-solidified droplets are directed towards a substrate where they impact and collect as rapidly solidified splats. Relatively high rates of solidification are achieved as a result of the thinness of the splats and the rapid heat extraction during flight and upon impacting with the substrate. The processing method uses codeposition of the metallic semi-solidified droplets (metallic matrix) with the injected reinforcement ceramic particles. In the present paper, the microstructures, mechanical properties, interfacial properties, thermal stability and aging behaviour of spray atomized and codeposited Al-Li-X MMC's (injected X=SiC, Al2O3) are reported and correlated to the processing conditions. 展开更多
关键词 LI Al Spray Atomized and Codeposited Al-Li based Metal-matrix composites Processing and Properties
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Polarization-Insensitive Magnetic Quadrupole-Shaped and Electric Quadrupole-Shaped Fano Resonances Based on a Plasmonic Composite Structure 被引量:1
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作者 董晨 李宝 +5 位作者 李韩笑 刘慧 陈孟琪 李冬冬 闫长春 张道华 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第7期68-71,共4页
A combined structure with the unit cell consisting of four sub-units with 90° rotation in turn is designed. Each of sub-units is composed of two gold rods in transverse arrangement and one gold rod in longitudina... A combined structure with the unit cell consisting of four sub-units with 90° rotation in turn is designed. Each of sub-units is composed of two gold rods in transverse arrangement and one gold rod in longitudinal arrangement. Simulating electromagnetic responses of the structure, we verify that the structure exhibits the double Fano resonances, which originate from the coupling between magnetic quadrupoles and electric dipoles and the coupling between electric quadrupoles and electric dipoles. Simulation results also demonstrate that the structure is polarization-insensitive and shows an analogue of electromagnetically induced transparency at the two Fano resonances. Such a plasmonic structure has potential applications in photoelectric elements. 展开更多
关键词 of is it in Polarization-Insensitive Magnetic Quadrupole-Shaped and Electric Quadrupole-Shaped Fano Resonances based on a Plasmonic composite Structure MODE that on
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Microstructure and hardness of Mg-based composites reinforced with Mg_2Si particles
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作者 Mustafa Aydin Cem zgür Osman San 《Rare Metals》 SCIE EI CAS CSCD 2009年第4期396-400,共5页
Magnesium powders were mechanically alloyed with SiO2 powder particles having different particle sizes using nigh-energy ball milling techniques under Ar atmosphere for 1 h. The powders were consolidated with cold pre... Magnesium powders were mechanically alloyed with SiO2 powder particles having different particle sizes using nigh-energy ball milling techniques under Ar atmosphere for 1 h. The powders were consolidated with cold pressing under 560 MPa. They were then sintered at 550℃ for 45 min under Ar atmosphere. The composites obtained on the Mg-SiO2 system were investigated using the Archimedes principle, a differential scanning calorimeter, X-ray diffraction, optic microscopy, and scanning electron microscopy. For the mechanically alloyed powders, the solid-state reaction of the synthesis of Mg2Si and MgO progressed further during sintering of the materials. The results showed that the strengthening mechanisms were dependent on dispersion hardening of fine Mg2Si and MgO particulates dispersed homogeneously in the matrix. Mg- 展开更多
关键词 based composites SIO2 mechanical alloying strengthening mechanism
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Tunable Band Gap in Piezoelectric Composite Rod Based on the Inter-Coupling Effect
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作者 Ze-Qun Fang Zhi-Lin Hou 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第5期60-64,共5页
The longitudinal wave propagating in one-dimensional periodic piezoelectric composite rod with inter-coupling between different piezoelectric segments is investigated. The analytical formulae for such a structure are ... The longitudinal wave propagating in one-dimensional periodic piezoelectric composite rod with inter-coupling between different piezoelectric segments is investigated. The analytical formulae for such a structure are shown and the dispersion relation is calculated. The results show that, by introducing the inter-coupling between the different piezoelectric segments, which is accomplished by serially connecting every n piezoelectric segment into supercells, some tunable Bragg band gaps can accordingly be opened in the low frequency region. The investigation could provide a new guideline for the tunable phononic crystal under passive control. 展开更多
关键词 UUT Tunable Band Gap in Piezoelectric composite Rod based on the Inter-Coupling Effect TP BG TN
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Structure and Stability of TiC/γ Interface inFe-Cr-Ni Base Composite
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作者 Xidong HUI Yuansheng YANG and Xnqiang WU (Institute of Metal Research, Chinese Academia of Science, Shenyang 110015, China)Zhifu WANG(Shandong University of Technology, Jinan 250061, China)Xichen CHEN(Institute of Physics, Chinese Academia of Science, Be 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1999年第2期151-154,共4页
The morphology. orientation relationship and stability of TiC/γ interface in Fe-Cr-Ni base composite synthesized with a liquid state in-situ process have been studied. The TiC/γ interface in as-cast sample is of coh... The morphology. orientation relationship and stability of TiC/γ interface in Fe-Cr-Ni base composite synthesized with a liquid state in-situ process have been studied. The TiC/γ interface in as-cast sample is of coherent feature. Its orientation relationship is (020)γ//(220)TiC, [001]γ||[001]TiC. During the aging at 1473 K, the TiC/γ interface may dissolve in matrix and lamellar M23C6 compound may precipitate from γ-matrix. 展开更多
关键词 Structure and Stability of TiC base Cr Interface inFe-Cr-Ni base composite Ni
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Photorefractive Effect in Poly(N-vinylcarbazole)-Based Composite Sensitised by C_(60)
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作者 Zhi Jie ZHANG Yi Wang CHEN +1 位作者 Yuan Kang HE and Hui Ying CHEN(Institute of Polymer Science, College of Chemistry, Peking University, Beijing, 100871)Zhi Jian CHEN Shu Feng WANG and Qi Huang GONG(Department of Physics, Mesoscopic Physics Laboratory, Peking U 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第9期807-810,共4页
A new PVK-based photorefractive polymer composite sensitized by C60 and doped with a higher content of EO chromophore was prepared. The high optical quality thin-film was formed between two ITOcovered glass electrode... A new PVK-based photorefractive polymer composite sensitized by C60 and doped with a higher content of EO chromophore was prepared. The high optical quality thin-film was formed between two ITOcovered glass electrodes. Two-beam-coupling (2BC) experiment was performed by using a He-Ne laser (at wavelength 632.8nm), and an obvious photorefractive performance was observed. The dependence of two-beamcoupling gain coefficient on the applied poling dc electric field was measured. 展开更多
关键词 Photorefractive Effect in Poly based composite Sensitised by C N-VINYLCARBAZOLE REV
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Corundum Based Composite Block Containing Plastic Phase
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作者 Yu Lingyan 《China's Refractories》 CAS 2009年第3期29-31,共3页
1 Scope This standard specifies the definition, classification, technical requirements, test methods, inspection rules, packing, marking, transportation and quality certificate of corundum block containing plastic ph... 1 Scope This standard specifies the definition, classification, technical requirements, test methods, inspection rules, packing, marking, transportation and quality certificate of corundum block containing plastic phase. 展开更多
关键词 Corundum based composite Block Containing Plastic Phase than GB
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An Investigation of Coral Based Bioactive Composite Bone in a Critical-sized Cranial Defects
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作者 Rui HOU Tian-Qiu MAO~△ Fu-Lin CHEN Zhan GAO Shu-Jun CHENYao-Wu YANG Xiao-Bing CHENG(Department of Oral and Maxillofacial Surgery, Stomatological College, Fourth Military Medical University, Xi’an 710032, China) 《生物医学工程学杂志》 EI CAS CSCD 北大核心 2005年第S1期1-3,共3页
关键词 BMSCs BONE An Investigation of Coral based Bioactive composite Bone in a Critical-sized Cranial Defects
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Enhancement of comprehensive properties of Nb-Si based in-situ composites by Ho rare earth doping
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作者 Wei Wei Qi Wang +2 位作者 Rui-Run Chen Chao-Wen Zheng Yan-Qing Su 《Rare Metals》 SCIE EI CAS CSCD 2024年第9期4508-4520,共13页
This study examines the microstructure,mechanical properties(with a focus on room-temperature toughness),and oxidation resistance of Ho-doped NbDSi based in-situ composites.The base alloy consists of the coarse primar... This study examines the microstructure,mechanical properties(with a focus on room-temperature toughness),and oxidation resistance of Ho-doped NbDSi based in-situ composites.The base alloy consists of the coarse primary Nb_(5)Si_(3)phase and the Nb_(5)Si_(3)+Nbss(Nb solid solution)eutectic cells.Ho doping influences the solidification path.When the Ho doping is higher than0.2 at%,the alloys transform into eutectic alloys.Ho can be solid-solved in trace amounts in the Nbss phase.However,most of Ho forms a stable Ho oxide phase,which alleviates oxygen contamination problem to some extent.Moreover,the interface separation between Ho oxide and other phases reduces the plastic deformation constraint.Thus,with 0.4 at%Ho doping,the K_(Q)value is18.03 MPa·m^(1/2),which is 31.1%higher than that of the base alloy.The strength of the Ho-doped alloys does not deteriorate with an increase in toughness.However,the large network-like Ho_(2)O_(3)in the 0.8Ho alloy causes a decrease in toughness and strength.In addition,the Ho oxide phase effectively blocks the inward oxygen intrusion.With 0.8 at%Ho doping,the oxidation mass gain per unit area is 10.16 mg·cm^(2),which is 39.7%lower than that of the base alloy. 展开更多
关键词 Nb-Si based composites Rare earth elements HO Microstructure Properties
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Fracture Properties of Cement Composites Reinforced with Steel Polypropylene Hybrid Fibres
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作者 郭宏定 钱春香 PietStroeven 《Journal of Southeast University(English Edition)》 EI CAS 1999年第2期55-62,共8页
Polypropylene fibres and three sizes of steel fibres reinforced concrete are discussed. The total fibres content ranges from 0 4%-0 95% by volume of concrete. A four point bending test is adopted on the notched pris... Polypropylene fibres and three sizes of steel fibres reinforced concrete are discussed. The total fibres content ranges from 0 4%-0 95% by volume of concrete. A four point bending test is adopted on the notched prisms with the size of 100?mm×100?mm×500?mm to investigate the effect of hybrid fibres on crack arresting. The research results show that there is a positive synergy effect between large steel fibres and polypropylene fibres on the load bearing capacity in the small displacement range. But this synergy effect disappears in the large displacement range. The large and strong steel fibre is better than soft polypropylene fibre and small steel fibre in the aspect of energy absorption capacity in the large displacement range. The static usage limitation for the hybrid fibres concrete with “wide peak' or “multi peaks' load CMOD pattern should be carefully selected. The ultimate load bearing capacity and the crack width or CMOD at this load level should be jointly considered. 展开更多
关键词 polypropylene fibre steel fibre fracture properties low fibre content cement based composites
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3D direct writing and micro detonation of CL-20 based explosive ink containing O/W emulsion binder 被引量:6
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作者 Zhan-xiong Xie Chong-wei An +4 位作者 Bao-yun Ye Jia-qing Mu Chun-yan Li Min-jie Li Song-jin Liu 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2022年第8期1340-1348,共9页
The booming development of DIW technology present an unprecedented prospect in energetic materials field and has attracted great interest due to its relative simplicity and high flexibility of manufacturing.Herein,a n... The booming development of DIW technology present an unprecedented prospect in energetic materials field and has attracted great interest due to its relative simplicity and high flexibility of manufacturing.Herein,a novel CL-20 based explosive ink formulation have been developed successfully for MEMS initiation systems via DIW technology.We designed PVA/GAP into an oil-in-water(O/W)emulsion,in the way that the aqueous solution of PVA as water phase,the ethyl acetate solution of GAP as oil phase,the combination of Tween 80 and SDS as emulsifier,BPS as a curing agent of GAP.The ideal formulation with good shear-thinning rheology properties and clear gel point was prepared using only 10 wt%emulsion.The dual-cured network formed during the curing process made the printed sample have good mechanical properties.The printed samples had satisfactory molding effect without cracks or fractures,the crystal form of CL-20 not changed and the thermal stability have improved.Deposition of explosive inks via DIW in micro-scale grooves had excellent detonation performances,which critical detonation size was 1×0.045 mm,detonation velocity was 7129 m/s and when the corner reaching 150°can still detonated stably.This study may open new avenues for developing binder systems in explosive ink formulations. 展开更多
关键词 Direct writing Explosive ink Emulsion binder system CL-20 based energetic composites Micron detonation
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Friction behavior of Ti-30Fe composites strengthened by TiC particles 被引量:3
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作者 Sheng-hang XU Jing-wen QIU +3 位作者 Hui-bin ZHANG Hua-zhen CAO Guo-qu ZHENG Yong LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第4期988-998,共11页
Ti-Fe-x TiC(x=0, 3, 6, 9, wt.%) composites were fabricated through low temperature ball milling of Ti, Fe and TiC powders, followed by spark plasma sintering. The results show that β-Ti, β-Ti-Fe, η-Ti4 Fe2 O0.4 and... Ti-Fe-x TiC(x=0, 3, 6, 9, wt.%) composites were fabricated through low temperature ball milling of Ti, Fe and TiC powders, followed by spark plasma sintering. The results show that β-Ti, β-Ti-Fe, η-Ti4 Fe2 O0.4 and TiC particles can be found in the composites. The microstructure can be obviously refined with increasing the content of TiC particles. The coefficient of friction(COF) decreases and the hardness increases with increasing the content of TiC particles. The adhesive wear is the dominant wear mechanism of all the Ti-Fe-x TiC composites. The Ti-Fe-6 TiC composite shows the best wear resistance, owing to the small size and high content of TiC particle as well as relatively fine microstructure. The wear rate of the Ti-Fe-6 TiC composite is as low as 1.869× 10-5 mm3/(N·m) and the COF is only 0.64. Therefore, TiC particle reinforced Ti-Fe based composites may be utilized as potential wear resistant materials. 展开更多
关键词 TiC particle Ti-Fe based composite powder metallurgy microstructure friction behavior
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DAMAGE AND FRACTURE EVALUATION OF GRANULAR COMPOSITE MATERIALS BY DIGITAL IMAGE CORRELATION METHOD 被引量:3
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作者 张珏 熊春阳 +3 位作者 李宏举 李明 王建祥 方竞 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2004年第4期408-417,共10页
This paper presents the applications of digital image correlation technique to the mesoscopic damage and fracture study of some granular based composite materials including steel- fiber reinforced concrete,sandstone a... This paper presents the applications of digital image correlation technique to the mesoscopic damage and fracture study of some granular based composite materials including steel- fiber reinforced concrete,sandstone and crystal-polymer composite.The deformation fields of the composite materials resulted from stress localization were obtained by the correlation computation of the surface images with loading steps and thus the related damage prediction and fracture parameters were evaluated.The correlation searching could be performed either directly based on the gray levels of the digital images or from the wavelet transform(WT)coefficients of the transform spectrum.The latter was developed by the authors and showed higher resolution and sensitivity to the singularity detection. Because the displacement components came from the rough surfaces of the composite materials without any coats of gratings or fringes of optical interferometry,both surface profiles and the deformation fields of the composites were visualized which was helpful to compare each other to analyze the damage of those heterogeneous materials. 展开更多
关键词 digital image correlation deformation field evaluation granular based composites damage and fracture
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Advancement in Layered Transition Metal Dichalcogenide Composites for Lithium and Sodium Ion Batteries 被引量:3
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作者 Muhammad Yousaf Asif Mahmood +3 位作者 Yunsong Wang Yijun Chen Zhimin Ma Ray P. S. Han 《Journal of Electrical Engineering》 2016年第2期58-74,共17页
With an ever increasing energy demand and environmental issues, many state-of-the-art nanostructured electrode materials have been developed for energy storage devices and they include batteries, supercapacitors and f... With an ever increasing energy demand and environmental issues, many state-of-the-art nanostructured electrode materials have been developed for energy storage devices and they include batteries, supercapacitors and fuel cells. Among these electrode materials, L-TMD (layered transition metal dichalcogenide) nanosheets (especially, S (sulfur) and Se (selenium) based dichaleogenides) have received a lot of attention due to their intriguing layered structure for enhanced electrochemical properties. L-TMD composites have recently been investigated not only as a main charge storage specie but also, as a substrate to hold the active specie. This review highlights the recent advancements in L-TMD composites with 0D (0-dimensional), 1 D, 2D, 3D and various forms of carbon structures and their potential applications in LIB (lithium ion battery) and SIB (sodium ion battery). 展开更多
关键词 L-TMD based composites energy storage devices nanocompsites LIBs and SIBs.
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Solid-state composite technology for B_4C_p reinforced magnesium-lithium alloy
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作者 吴利斌 孟祥瑞 +3 位作者 巫瑞智 崔崇亮 张密林 张景怀 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第4期820-824,共5页
B 4 C p /Mg-8Li-1Zn and B 4 C p /Mg-8Li-1Al-1Y composites were prepared with hot-extrusion solid-state composite processing. The microstructures and mechanical properties of the composites were studied. With the optim... B 4 C p /Mg-8Li-1Zn and B 4 C p /Mg-8Li-1Al-1Y composites were prepared with hot-extrusion solid-state composite processing. The microstructures and mechanical properties of the composites were studied. With the optimized parameters, the deformation effects and the migration of α phase are improved, and the amount and size of foil gaps are decreased. The bonding force between foils is improved, and the oxidation of foils is lowered. The results of tensile test show that the strengths of the B 4 C p /Mg-8Li-1Zn and B 4 C p /Mg-8Li-1Al-1Y composites are increased obviously after hot-extrusion solid-state composite processing (238 MPa and 257.23 MPa, respectively). The specific strength of B 4 C p /Mg-8Li-1Al-1Y composite is the highest (169.23×10 3 cm). 展开更多
关键词 Mg-Li base composites B4C MICROSTRUCTURES mechanical properties
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