常压烧结莫来石／氧化锆／碳化硅复相陶瓷的研究  

Pressureless Sintering Mullite/ZrO 2/SiC Multiphase Ceramics

作　　者：孟佳宏[1] 杨正方[1] 刘维跃[1] 刘雄光 

机构地区：[1]天津大学材料科学与工程系

出　　处：《硅酸盐通报》1996年第2期25-29,共5页Bulletin of the Chinese Ceramic Society

摘　　要：本文对莫来石／氧化锆／碳化硅复相陶瓷进行了Ｎ２气氛中常压烧结的研究。实验结果表明：ＳｉＣ粒子添加量≤２０ｖｏｌ％时，材料均可致密烧结并可获得均匀的微观结构。ＳｉＣ粒子的加入使材料的力学性能较莫来石／氧化锆（ＺＴＭ）陶瓷有明显提高，并在ＳｉＣ含量为１０ｖｏｌ％时达到峰值，室温强度和断裂韧性分别为６０１ＭＰａ和５８ＭＰａｍ１／２，接近热压材料。Pressureless sintered SiC particles/dispersed ZrO 2/toughened mullite multiphase ceramics in a N 2 atmosphere were studied.The results showed that the densification and homogeneous microstructure could be obtained when the SiC P content was less than or equal to 20 vol%.The mechanical properties of the materials with SiC particles were obviously improved compared with that of ZTM ceramics,the maximun values of flexural strength and fracture toughness at room temperature were 601MPa and 5.8 MPam 1/2 respectively for ZTM 15 /SiC P with 10 vol% SiC P content,almost reaching the values of hot-pressed materials with the same compositions.Simultaneously,it was found that the N 2 atmosphere had a significant effect on ZTM ceramics during the densification process.

关 键 词：复相陶瓷 常压烧结 莫来石 氧化锆 碳化硅 

分 类 号：TQ174.758[化学工程—陶瓷工业]