热处理温度对机械合金化合成Ti3AlC2粉体纯度的影响  

Effect of heat treatment temperature on purity of Ti_3AlC_2 powders synthesized by MA

作　　者：金松哲[1] 王蕾[1] 吴化[1] 孙世成[1] 任露泉[2] 杨晨[3] 

机构地区：[1]长春工业大学材料科学与工程学院,吉林长春130012 [2]吉林大学地面机械仿生技术教育部重点实验室,吉林长春130022 [3]吉林大学教育部汽车材料重点实验室,吉林长春130022

出　　处：《材料热处理学报》2008年第3期35-38,共4页Transactions of Materials and Heat Treatment

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

摘　　要：采用放电等离子烧结（SPS）系统对含有TiC等杂质相的机械合金化（MA）合成的Ti3AlC2粉体进行热处理，研究了热处理温度对粉体中Ti3AlC2纯度的影响。结果表明：SPS无压加热处理可以显著提高机械合金化合成粉体中Ti3AlC2的含量。经SPS热处理的粉体中Ti3AlC2的含量在600～1000℃范围内随热处理温度的提高而增加，温度不高于900℃时处理后的粉体还基本保持粉体特征。当温度为1000℃时，得到产物中Ti3AlC2纯度可达到93％。通过对点阵常数测定可知随着热处理温度的提高Ti3AlC2点阵常数逐渐接近理论值。Ti3AlC2 powder contained TiC and other unwanted impurities were sintered by spark plasma sintering （SPS）. Effect of heat treatment temperature on amount of impurity in the Ti3AlC2 powder was studied. The results show that SPS pressureless sintering can apparently increase Ti3AlC2 content in the mechanical alloyed powder. Ti3AlC2 content in the powder increases with rising heat treatment temperature at 600℃ ～ 1000℃. The powder still keep powder state when the heat treatment temperature below 900 ℃ . Ti3AlC2 content in the product can reach 93wt% at 1000℃. Through the lattice constant determination can be seen, along with heat treatment temperature gradually raising Ti3AlC2 lattice constants close to the theoretical value.

关 键 词：TI3ALC2 脉冲放电等离子烧结 热处理 

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]