不同保温时间对SiC复合陶瓷结构与形貌的影响  

Effect of different holding time on the structure and morphology of SiC ceramics

作　　者：鹿桂花[1,2] 周恒为[1,2] 李志鹏[1] 朱强[1] Lu Guihua;Zhou Hengwei;Li Zhipeng;Zhu Qiang(College of Physics Science and Technology,Yili Normal University,Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters,Yining 835000,China;State Key Laboratory of Solid State Microstructures,School of Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]伊犁师范学院物理科学与技术学院新疆凝聚态相变与微结构实验室,新疆伊宁835000 [2]南京大学物理学院国家固体微结构重点实验室,江苏南京210093

出　　处：《现代盐化工》2018年第4期33-35,共3页Modern Salt and Chemical Industry

基　　金：新疆维吾尔自治区自然科学基金项目(2015211C300)

摘　　要：本文采用无压液相烧结工艺,以Al_2O_3-MgO-Y_2O_3体系为烧结助剂,烧结温度为1 900℃,保温时间分别为1 h,1.5 h和2 h,制备SiC复合陶瓷,利用XRD和SEM方法研究了SiC陶瓷的物相组成和显微组织形貌。结果表明:保温2 h时,SiC陶瓷主晶相为6H-SiC,且是单相SiC;陶瓷体表面光滑,致密性良好,密度为2.959 g/cm^3,所以2 h为最佳保温时间。SiC composite ceramics were prepared by using Al2O3-MgO-Y2 O3 as sintering assistant and pressureless liquid phase sintering process at 1 900 ℃. The phase composition and surface microstructure of SiC ceramics were studied by XRD and SEM in this paper. The results show that the main crystal phase of SiC ceramics is 6 H-SiC and it is a single-phase SiC, and the surface of SiC ceramics was smooth and compact. The density is 2.959 g/cm^3, so 2 h is the best holding time.

关 键 词：碳化硅陶瓷 保温时间 无压液相烧结 物相组成 显微组织形貌 

分 类 号：TQ174.1[化学工程—陶瓷工业]