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Fabrication of FeAl/TiC composites through reactive hot pressing 被引量:1
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作者 刘峰晓 刘咏 +2 位作者 黄伯云 贺跃辉 周科朝 《Journal of Central South University of Technology》 2004年第4期343-347,共5页
FeAl/TiC composites were fabricated by reactive hot pressing blended elemental powders. The TiC content was varied from 50% to 80%(volume fraction) and the aluminum content in the binder phase was changed from 40% to ... FeAl/TiC composites were fabricated by reactive hot pressing blended elemental powders. The TiC content was varied from 50% to 80%(volume fraction) and the aluminum content in the binder phase was changed from 40% to 50%(mole fraction). The effects of these compositional changes on the densification process and mechanical properties were studied. The results show that with the increase of TiC content, densities of the composites decrease due to insufficient particle rearrangement aided by (dissolutionreprecipitation) reaction during hot pressing. Closely related with their porosities and defect amount, the hardness and bend strength of the composites show peak values, attaining the highest values with TiC content being 70% and 60%, respectively. Increasing the aluminum content is beneficial to the densification process. But the hardness and bend strength of the composites are reduced to some extent due to the formation of excessive oxides and thermal vacancies. 展开更多
关键词 FeAl/TiC composite densification process mechanical property reactive hot pressing
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Mechanical properties and microstructure of in situ TiB_2/Cu composite fabricated by reactive hot pressing
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作者 WANG Guisong,JIANG Yanqing,and ZHANG Lide School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China 《Rare Metals》 SCIE EI CAS CSCD 2007年第S1期322-325,共4页
A copper matrix composite reinforced by TiB_2 particle was fabricated by reactions of Cu,Ti and B powders.The microstructure and mechanical properties of the in situ composite were investigated.The results showed that... A copper matrix composite reinforced by TiB_2 particle was fabricated by reactions of Cu,Ti and B powders.The microstructure and mechanical properties of the in situ composite were investigated.The results showed that the in situ formed TiB_2 particles,which has a size of no larger than 1 μm,exhibits a uniform distribution in the copper matrix.Due to TiB_2 reinforcement,the mechanical properties in terms of Young's modulus and yield and ultimate tensile stress of the in situ TiB_2/Cu composite are improved greatly.In addition,even if the volume fraction of TiB_2 reinforcement are the same,the composite in the present study containing fine TiB_2 particles exhibits much higher properties than that of the composite reinforced with coarse ones. 展开更多
关键词 TiB_2/Cu in-situ composite MICROSTRUCTURE mechanical properties reactive hot pressing
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Microstructure,Mechanical,and Thermal Properties of B4C-TiB2-SiC Composites Prepared by Reactive Hot-pressing 被引量:3
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作者 CAO Yaoqin HE Qianglong WANG Weimin 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第6期1031-1037,共7页
B4C-TiB2-SiC composites with excellent properties were prepared by reactive hot-pressing using B4C,TiC,and Si powders as the raw materials.The phase transition process was investigated by heating the powder mixture to... B4C-TiB2-SiC composites with excellent properties were prepared by reactive hot-pressing using B4C,TiC,and Si powders as the raw materials.The phase transition process was investigated by heating the powder mixture to different temperatures and combined with XRD tests.TiB2 and SiC phases were synthesized through an in situ reaction,and the mechanical and thermal properties were improved simultaneously.Microstructure and mechanical properties were also studied,and the 60wt% B4C-21.6wt% TiB2-18.4wt% SiC composite showed a relative density of 99.1%,Vickers hardness of 34.6 GPa,flexural strength of 582 MPa,and fracture toughness of 5.08 MPa·m1/2.In addition,the values of thermal conductivity and thermal expansion coefficient were investigated,respectively. 展开更多
关键词 B4C-TiB2-SiC reactive hot pressing MICROSTRUCTURES mechanical properties thermal properties
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