氮化铝含量对SiC-AlN复相陶瓷常压烧结性能的影响  

Effect of AlN Content on the Pressureless Sintering Behaviors of SiC-AlN Multiphase Ceramics

作　　者：马奇[1] 郭兴忠[1,2] 李海淼[1] 杨辉[1,2] 傅培鑫 高黎华 李志强 

机构地区：[1]浙江大学材料科学与工程系,浙江杭州310027 [2]浙江大学绿色建材与应用技术工程研究中心,浙江杭州310027 [3]浙江东新密封有限公司,浙江乐清325604

出　　处：《稀有金属材料与工程》2008年第A02期518-521,共4页Rare Metal Materials and Engineering

基　　金：浙江省重大科技项目(2005C11067);浙江省重大科技项目(2006C11184)资助

摘　　要：采用无压烧结(2050℃、Ar气氛)制备SiC-AlN复相陶瓷,利用XRD、SEM、EDAX等分析了AlN含量对复相陶瓷的致密程度、物相组成、微观形貌、烧结性能的影响。研究结果表明,随着AlN含量的增加,陶瓷主晶相由等轴状向棒状或片状转变且晶粒尺寸明显细化;断裂方式由单一穿晶断裂向沿晶断裂过渡。AlN含量为10%时,复相陶瓷相对密度高达97%,烧结性能最好,有晶粒拨出和撕裂效应。The SiC-AIN multiphase ceramics were pressureless sintered at 2050 ℃ in flowing Ar air and their phase composition, microstructure were analyzed by XRD, SEM and EDAX. The results show that with the increase of AIN content, the shape of main phase changes from the equiaxed to the bar or flake size, and the fracture mode also changes from transgranular fracture to along the crystals. The ceramics has the best sintering properties with relative density of 97% when the content of AIN is 10%, and performs the toughening mechanism with grains pull-out and tearing-open.

关 键 词：碳化硅 复相陶瓷 氮化铝 

分 类 号：TQ174.1[化学工程—陶瓷工业]