Optimal preparation of high-entropy boride-silicon carbide ceramics

作     者：Yan ZHANG Shi-Kuan SUN Wei-Ming GUO Liang XU Wei ZHANG Hua-Tay LIN Yan ZHANG;Shi-Kuan SUN;Wei-Ming GUO;Liang XU;Wei ZHANG;Hua-Tay LIN

作者机构：School of Electron-mechanical EngineeringGuangdong University of TechnologyGuangzhou 510006China Department of Materials Science and EngineeringUniversity of SheffieldSheffield SI 3JDUK 

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

年 卷 期：2021年第10卷第1期

页      面：173-180页

核心收录：

学科分类：080503[工学-材料加工工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University(No.19ZK0113) the Pearl River S and T Nova Program of Guangzhou(No.201710010142) Science and Technology Planning Project of Guangdong Province(No.2017A050501033),National Natural Science Foundation of China(Nos.51402055,51602060,U1401247) Guangdong Innovative and Entrepreneurial Research Team Program(Nos.2013G061,2014YT02C049). 

主　　题：high-entropy boride-silicon ceramics borothermal reduction boro/carbothermal reduction microstructure mechanical properties 

摘      要：High-entropy boride-silicon carbide(HEB-SiC)ceramics were fabricated using boridebased powders prepared from borothermal and boro/carbothermal reduction methods.The effects of processing routes(borothermal reduction and boro/carbothermal reduction)on the HEB powders were examined.HEB-SiC ceramics with98%theoretical density were prepared by spark plasma sintering at 2000℃.It was demonstrated that the addition of SiC led to slight coarsening of the microstructure.The HEB-SiC ceramics prepared from boro/carbothermal reduction powders showed a fine-grained microstructure and higher Vickers9 hardness but lower fracture toughness value as compared with the same composition prepared from borothermal reduction powders.These results indicated that the selection of the powder processing method and the addition of SiC phase could contribute to the optimal preparation of high-entropy boride-based ceramics.