Properties of CNTs/MoSi2 composites prepared by spark plasma sintering

作     者：张勇 张厚安 吴和尖 古思勇 陈莹 ZHANG Yong;ZHANG Hou-an;WU He-jian;GU Si-yong;CHEN Ying

作者机构：Xiamen Key Laboratory for Power Metallurgy Technology and Advanced Materials (Xiamen University of Technology) Xiamen 361024 China Fujian Key Laboratory of Functional Materials and Applications Xiamen University of Technology Xiamen 361024 China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2016年第23卷第12期

页      面：3060-3064页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Project(51371155)supported by the National Natural Science Foundation of China Project(2014H0046)supported by the Key Science and Technology Project of Fujian Province,China Project(3502Z20143036)supported by the Scientific Research Fund of Xiamen,China Project(JB13149)supported by the Education Department Science and Technology Project of Fujian Province,China Project(2012D131)supported by the Natural Science Foundation Guidance Project of Fujian Province,China 

主　　题：CNTs/MoSi2 composite spark plasma sintering mechanical property microstructure strengthening and tougheningmechanism 

摘      要：Molybdenum disilicide(MoSi_2) based composites with various contents of carbon nanotubes(CNTs) were fabricated by spark plasma sintering(SPS) in vacuum under a pressure of 25 *** composites obtained under a sintering temperature of 1500 °C and time of 10 min exhibited optimum mechanical properties at room temperature in terms of fracture toughness and transverse rupture ***_2 based composite with 6.0% CNTs(volume fraction) had the highest fracture toughness,transverse rupture strength and hardness,which were improved by about 25.7%,51.5% and 24.4% respectively,as compared with pure MoSi_2.A Mo_(4.8)Si_3C_(0.6) phase was detected in CNTs/MoSi_2 composites by both X-ray diffraction(XRD) method and microstructure analysis with scanning electron microscopy(SEM).It is believed that the fine grains and well dispersed small Mo_(4.8)Si_3C_(0.6) particles had led to a higher hardness and strength of CNTs/MoSi_2 composites because of their particle pullout,crack deflection and micro-bridging effects.