Ti_3SiC_2结合刚玉材料的制备及性能研究  

Research on Preparation and Properties of Ti_3SiC_2 Bonded Corundum Materials

作　　者：崔鸿[1] 尹洪峰[1] 袁蝴蝶[1] 冯银平[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《硅酸盐通报》2014年第2期328-332,共5页Bulletin of the Chinese Ceramic Society

摘　　要：以板状刚玉为骨料,两种原料体系：TiC/Ti/Si,TiC/Ti/SiC作基质相,酚醛树脂作结合剂,在氩气保护下于1350~1550℃制备Ti3SiC2结合刚玉材料。研究了原料体系和烧成温度对其相组成、显微结构及常温物理性能的影响。结果表明：两种原料体系制备所得Ti3SiC2结合刚玉材料的相组成均为Al2O3,Ti3SiC2和TiC。两种原料体系在1350~1400℃合成材料耐压强度较高;随着烧成温度升高,其耐压强度减小。其中,Ti3SiC2结合刚玉材料采用体系TiC/Ti/Si,在1400℃烧结6 h获得最佳综合性能：基质相中Ti3SiC2含量达到64%,耐压强度为65 MPa。Ti3SiC2 bonded corundum materials were prepared using tabular alumina as aggregate, two kinds of raw powder systems： TiC/Ti/Si, TiC/Ti/SiC as matrix, and phenolic resin as binder, firing at 1350-1550 ℃ in Ar atmosphere. The influence of raw material system and firing temperature on phase composition, microstructure and room temperature physical properties of Ti3SiC2 bonded corundum samples were investigated. The results showed： when Ti3SiC2 bonded corundum materials were sintered using two kinds of raw material systems, the main phases of samples were A1203, Ti3SiC2 and TiC. When firing at 1350-1400 ~C, the samples of two kinds of raw material systems possessed high compressive strength. With increasing firing temperature, the compressive strength of samples decreased. The samples prepared with TiC/Ti/Si gained the best performance when firing at 1400 ~C for 6 h, Ti3SiC2 content in the matrix reached 64%, the compressive strength of samples was 65 MPa.

关 键 词：刚玉 TI3SIC2 反应烧结 显微结构 

分 类 号：TB35[一般工业技术—材料科学与工程]