Ti_3SiC_2/Al_2O_3复合材料的SPS烧结及其性能研究  

The Preparation of Ti_3SiC_3/Al_2O_3 Composites by SPS and Their Properties

作　　者：吴瑞芬[1] 潘伟[1] 石随林[1] 韩若冰[1] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2007年第A01期671-674,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助(50232020;50572042)

摘　　要：利用放电等离子烧结(SPS)方法成功制备了Ti3SiC2/Al2O3复合材料,用XRD及SEM对其组成和结构进行了表征。另外系统研究了Ti3SiC2/Al2O3复合材料的弹性模量及673K时的热传导性能。结果表明复合材料弹性模量高于理论上限模量,随着Ti3SiC2含量的增加复合材料弹性模量减小,且Ti3SiC2的加入使复合材料的热导率较Al2O3有一定的提高,673K时复合材料热导率符合"海岛-网络"模型。In present study, Ti3SiC2/Al2O3 composites were prepared by spark plasma sintering process （SPS）. The crystal phase and microstructure were observed by XRD and SEM. The Young＇s modulus and thermal properties of Ti3SiC2/Al2O3 composites were characterized. The results show that, the Young＇s modulus of Ti3SiC2/Al2O3 composites higher than upper limit modulus, and decreased with the volume fraction of Ti3SiC2 increasing. Besides, the thermal conductivity of the composites improved relative to pure Al2O3 due to the addition of Ti3SiC2, and followed the ＂island-network＂ model.

关 键 词：Ti3SiC2/Al2O3复合材料 SPS烧结 致密化 弹性模量 热导率 

分 类 号：TF124.5[冶金工程—粉末冶金]