TOUGHENING OF IN SITU SYNTHESIZED MoSi_2-SiC COMPOSITE AT ROOM TEMPERATURE

作     者：Z.Q. Sun, L.Q. Zhang, W.Y. Yang, X.W. Fu and J. ZhuThe State Key Laboratory for Advanced Metals and Materials, University of Science & TechnologyBeijing, Beijing 100083, ChinaSchool of Material Science & Engineering, University of Science & Technology Bei 

作者机构：The State Key Laboratory for Advanced Metals and Materials University of Science & Technology Beijing School of Material Science & Engineering University of Science & Technology Beijing 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2002年第15卷第3期

页      面：317-323页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：the National Natural Science Foundation of China (No. 59895150-04-02) 

主　　题：MoSi2-SiC composite synthesized in situ fracture toughening at room temperature 

摘      要：The in situ synthesized MoSi2-SiC composite is proved to be of higher fracture toughness than the monolithic MoSi2. The TEM and HREM study reveals that the interface between MoSi2/SiC is of direct atomic bonding without any amorphous glassy phase, such the SiO2 structure. Based on the fractography and the observation of crack propagation path from indentation, it is concluded that the toughening of such composite at room temperature can be attributed to the high interfacial binding energy, the refinement of the MoSi2 matrix and the deflection and bridging behavior in the crack propagation.