碳化硼SPS烧结致密化行为研究  

Sintering Behavior of Boron Carbide by SPS Process

作　　者：魏红康[1] 汪长安[1,2] 谢志鹏[1,2] 邓翔宇[1] 

机构地区：[1]景德镇陶瓷学院,江西景德镇333403 [2]清华大学,北京100084

出　　处：《陶瓷学报》2014年第5期470-473,共4页Journal of Ceramics

基　　金：国家自然科学基金(编号:51102120;512020977);清华大学新型陶瓷与精细工艺国家重点实验室开放课题;景德镇市科技计划项目

摘　　要：采用放电等离子烧结工艺,在1600℃下对碳化硼粉末进行烧结。研究了保温时间、烧结压力对碳化硼烧结致密化行为和力学性能的影响,并借助X射线衍射和扫描电镜分析了烧结制品物相组成和微观结构的变化规律。研究结果表明:保温时间和烧结压力的增加有利于碳化硼的烧结致密化和力学性能的提高。当烧结温度为1500℃-1600℃时,B4C的烧结致密化速率最快。1600℃保温13 min后,试样不再收缩。In this paper, boron carbide powders were prepared by spark plasma sintering at 1600 ℃. The effects of holding time and sintering pressure on their sintering behavior and mechanical properties were investigated. The phase composition and microstructure of the sintered products were analyzed by XRD and SEM. The results indicate that the increase of holding time and sintering pressure is beneficial for the improvement of their density and mechanical properties. The maximum densification rate could be reached when sintered at 1500 - 1600 ℃, and the shrinkage stopped when the holding time was 13 min.

关 键 词：碳化硼 放电等离子烧结 烧结致密化行为 力学性能 微观结构 

分 类 号：TQ174.7[化学工程—陶瓷工业]