Preparation of SiC coated graphite composite powders by nitriding combustion synthesis
作者机构：State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China China Nuclear Power Engineering Co.Ltd.Beijing 100840China
出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)
年 卷 期：2023年第12卷第10期
页 面：1930-1945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 by the National Natural Science Foundation of China(No.92163112) the Natural Science Foundation of Shaanxi Province(No.2023-JC-JQ-29) the Innovative Scientific Program of CNNC,and the Opening Foundation of Shaanxi Key Laboratory of Aerospace Composites
主 题：SiC-coated graphite powders nitriding combustion synthesis(CS) antioxidation properties
摘 要：Ceramic-coated graphite powders are considered as effective raw materials to fabricate three-dimensional continuous ceramic skeleton-reinforced graphite matrix composites which can overcome their inherent poor densification and improve their mechanical and antioxidation ***,the morphology and thickness regulation of ceramic coatings on graphite particles are still a great ***,SiC-coated graphite(graphite@SiC)powders were prepared by nitriding combustion synthesis using Si and graphited mesocarbon microbead(MCMB)as raw powders with polytetrafluoroethylene(PTFE)as a *** effects of the PTFE content and the Si/MCMB molar ratio on the phase composition and coating morphology were *** phase transition and microstructure evolution of a combustion synthesis(CS)process were revealed by a gas-released quenching *** the Si/MCMB molar ratio was 1:3 and the PTFE content was 10 wt%,the thickness of the SiC coating synthesized under 2 MPa N_(2)reached 1.14μ*** corresponding sintered graphite@SiC composite had relative density of 99.2%and flexural strength of 231 MPa,accompanied by a significant improvement in high-temperature antioxidation *** as-synthesized graphite@SiC powders with good sinterability and antioxidation properties show great promise for applications in the nuclear industry and other extreme fields.
维普期刊数据库