热压TiC/Ti/Si/Al合成Ti_3SiC_2材料的研究  

Study on Fabrication of Ti_3SiC_2 by Hot Pressing TiC/Ti/Si/Al Powder Mixtures

作　　者：梅炳初[1] 刘俊[1] 朱教群[1] 徐学文[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《稀有金属材料与工程》2005年第2期252-255,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助(50172037);教育部重点科技项目资助(02052)

摘　　要：研究了向原料粉中掺加Al粉对合成高纯致密Ti3SiC2材料的影响.实验表明以2TiC/1Ti/1Si/0.2A1为起始原料组成,采用热压工艺在1 200℃～1 400℃的温度范围内,可以制备得到密度达到理论密度98%以上的高纯致密Ti3SiC2块体材料.由XRD数据计算得到的晶格参数与文献中的值接近.通过SEM和EPMA分析得知Ti3SiC2晶粒呈板状结晶形貌,且发育良好,晶粒在平面内的尺寸分别为3μm～8 μm和4 μm～10 μm.High purity bulk dense Ti3SiC2 have been successfully prepared by hot pressing the starting powder mixtures of 2TiC/1Ti/1Si/0.2A1 in the temperature range of 1 200degreesC similar to 1 400degreesC. The bulk samples obtained are single phase Ti3SiC2 with density that is 98% of the theoretical value. The lattice constants calculated from the data of XRD are comparable to the reported values. Characterized by SEM and EPMA, the obtained Ti3SiC2 grains are plate-shaped and well developed, and have the sizes in the plane dimension of 3 gm similar to8 gm and 4 mum -10 mum respectively.

关 键 词：TI3SIC2 合成 热压烧结 铝 

分 类 号：TB39[一般工业技术—材料科学与工程]