| Room—temperature mechanical properties of WSi2／MoSi2 composites |
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| 引用本文： | ZHANGHouan LIUXinyu 等.Room—temperature mechanical properties of WSi2／MoSi2 composites[J].稀有金属(英文版),2002,21(4):304-307. |
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| 作者姓名： | ZHANGHouan LIUXinyu |
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| 作者单位： | [1]InstituteofMaterialSurfaceEngineering,XiangtanPolytechnicUniversity,Xiangtan411201,China;DepartmentofMaterialScienceandEngineering,CentralSouthUniversity,Changsha410083,China [2]Research,XiangtanPolytechnicUniversity,Xiangtan411201,China;DepartmentofMaterialScienceandEngineering,CentralSouthUniversity,Changsha410083,China |
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| 摘 要： | Five Kinds of WSi2/MoSi2 composites were successfully prepared by mechanical alloying,IP and high temperature sintering techniques.And their hardness and fracture toughness were measured by the Vickers indentation fracture mode through an Hv-10A type sclerometer.The microstructure and morphology were investigated by a JSM-5600IV scanning electron microscope.Results show that the addition of 50% WSi2(in mole fraction)has remarkable hardening and toughening effects on the MoSi2 matrix.whose hardness value and fracture toughness value are increased about 60% and 86%,respectively.For WSi2/MoSi2 comosite,the hardening mechanisms are fine-grain and the second phase particles strengthening,and the toughening mechanisms include fine-grain,grain drawing,crack deflection,microbridge and bowing toughening.
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| 关 键 词： | 钼 MoSi2 机械性能 试验 |
Room-temperature mechanical properties of WSi2/MoSi2 composites |
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| Zhang Houan,Chen Pin,Wang Mengjun,LIU Xinyu.Room-temperature mechanical properties of WSi2/MoSi2 composites[J].Rare Metals,2002,21(4):304-307. |
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| Authors: | Zhang Houan Chen Pin Wang Mengjun LIU Xinyu |
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| Abstract: | Five kinds of WSi2/MoSi2 composites were successfully prepared by mechanical alloying, IP and high temperature sintering techniques. And their hardness and fracture toughness were measured by the Vickers indentation fracture mode through an Hv-10A type sclerometer. The microstructure and morphology were investigated by a JSM-56001V scanning electron microscope. Results show that the addition of 50% WSi2 (in mole fraction) has remarkable hardening and toughening effects on the MoSi2 matrix, whose hardness value and fracture toughness value are increased about 60% and 86%, respectively. For WSi2/MoSi2 composite, the hardening mechanisms are fine-grain and the second phase particles strengthening, and the toughening mechanisms include fine-grain, grain drawing, crack deflection, microbridge and bowing toughening. |
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| Keywords: | MoSi2 WSi2 hardening and toughening mechanical property |
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