SiC原料颗粒级配对Si_3N_4结合SiC复合陶瓷材料的影响  

Effect of SiC Particle Size Distribution on Si_3N_4/SiC Composite Ceramics

作　　者：李君[1] 员文杰[1] 邓承继[1] 祝洪喜[1] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081

出　　处：《中国陶瓷工业》2012年第6期9-13,共5页China Ceramic Industry

基　　金：湖北省自然科学基金(编号:2011CDB240);国家科技支撑计划(编号:2011BAB03B04)

摘　　要：采用SiC粉和Si粉高温氮化反应烧结制备Si3N4结合SiC复合陶瓷材料。研究四种SiC原料粉体(0-1mm、74μm、44μm、和0.5μm)中三种不同粒度不同含量颗粒级配对Si3N4结合SiC复合陶瓷材料的影响。通过X射线衍射仪和扫描电子显微镜对试样的物相和显微结构进行表征,并对试样的耐压强度等力学性能进行测试。结果表明:采用三种SiC较细粉体颗级配且如下组成:74μm的含量为5 wt%,44μm的含量为10 wt%,0.5μm的含量为35 wt%,所制备的Si3N4结合SiC陶瓷材料的基本烧结性能较好,其体积密度为2.43g/cm3,耐压强度为324MPa。Si3N4/SiC composite ceramics were prepared by high temperature nitrification sintering of SiC and Si powders. Effects of different batchings of SiC powders in 3 of the four particle sizes （0-1mm, 74μm, 44μm and 0.5μm） on Si3N,/SiC composite ceramics were studied. The as-prepared samples were characterized by XRD and SEM, and their mechanical properties were also tested. Results show： the sample made from the mixture of SiC powders in the three finest sizes of 74 μm, 44 μm and 0.5 μm to the ratio of 5 wt%, 10 wt % and 35 wt % has high sintering performance with the bulk density of 2.43g/cm3 and the compressive strength of 324MPa.

关 键 词：粒度 颗粒级配 SI3N4结合SIC 

分 类 号：TQ174.1[化学工程—陶瓷工业]