Enhanced thermal shock and oxidation resistance of Si_2BC_3N ceramics through MWCNTs incorporation

作     者：Ning LIAO Dechang JIA Zhihua YANG Yu ZHOU Yawei LI 

作者机构：Institute for Advanced CeramicsSchool of Materials Science and EngineeringHarbin Institute of Technology Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing TechnologyMinistry of Industry and Information Technology State Key Laboratory of Refractories and MetallurgyWuhan University of Science and Technology National–provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2018年第7卷第3期

页      面：276-288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：supported financially by National Natural Science Foundation of China (NSFC Grant Nos. 51702065 and 51621091) 

主　　题：Si2BC3N ceramics MWCNTs thermal shock resistance oxidation resistance 

摘      要：Multi-walled carbon nanotubes(MWCNTs)reinforced Si_2BC_3N ceramics were prepared through mechanical alloying(MA)and following spark plasma sintering(SPS).The thermal shock resistance of Si_2BC_3N ceramics was evaluated comparatively through ice water quenching test and theoretical ***,the oxidation resistance of MWCNTs incorporated Si_2BC_3N ceramics was evaluated under high *** results show that the calculated parameters such as the critical thermal shock temperature(R)and the thermal stresses resistance(R_(st)),as well as the toughness(R)are improved with addition of 1 vol%*** addition,the crack propagation resistance of 1 vol%MWCNTs incorporated Si_2BC_3N ceramics is obviously improved through generating more tortuous crack propagation paths attributing to thecrack bridging,pull-out,andcrack deflectionmechanisms of ***,the residual strengths of 1 vol%MWCNTs containing specimens remained the highest after the thermal shock ***,the present work also reveals that the oxidation resistance is more sensitive to relative density than MWCNTs addition.