高纯度Ti_3SiC_2粉体的制备及真空热处理  

Preparation and vacuum heat treatment of high purity Ti_3SiC_2 powder

作　　者：高宇[1] 霍俊[2] 金松哲[2] 王昕[1] 孙世成[2] 

机构地区：[1]长春工业大学机电工程学院,吉林长春130012 [2]长春工业大学材料科学与工程学院,吉林长春130012

出　　处：《金属热处理》2009年第10期16-18,共3页Heat Treatment of Metals

基　　金：吉林省科技发展项目(20070511);博士点基金(20060183058)

摘　　要：以3Ti/S i/2C/0.2A l粉体为原料通过机械合金化制备了Ti3S iC2粉体,用X射线衍射仪和扫描电镜对机械合金化粉体和热处理粉体进行相分析和颗粒形貌观察,研究了真空热处理温度对机械合金化制备Ti3S iC2粉体纯度的影响。结果表明,3Ti/S i/2C粉体球磨10 h可获得由TiC、Ti3S iC2、TiS i2组成的混合粉体,粉体中的Ti3S iC2含量最高可达到83wt%。在热处理温度为700-1000℃内Ti3S iC2粉末粉体含量随温度的提高而增加,当热处理温度为1000℃时,其含量可达到98wt%以上。Ti3SiC2 powder was prepared by mechanical alloying（MA） with 3Ti/Si/2C/0. 2Al raw materials. The phase analysis and particle morphology of the MA and heat treated powder was conducted with X-ray diffraetometer and SEM. Etteet of vacuum heat treatment temperature on purity of the MA Ti3SiC2 powder was studied. The results show that mixed powders composed of TiC, Ti3SiC2 and TiSi2 can be obtained by hall milling with 3Ti/Si/2C powders for 10 h,in which Ti3 SiC2 content in the powder can reach 83wt%. Ti3 SiC2 powder content increases with increasing heat treatment temperature in the range of 700-1000 ℃ ,the content of Ti3SiC2 powder can reach 98wt% when the heat treatment temperature attains 1000 ℃.

关 键 词：Ti3SiC2粉末 机械合金化 真空热处理 纯度 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]