Mechanical alloying and characteristics of spark plasma sintering of Ti-Al composite powders  

作　　者：陈华 薛涛 门洪志 

机构地区：[1]School of Materials Science and Engineering,Changchun University of Technology

出　　处：《中国有色金属学会会刊：英文版》2007年第A02期608-613,共6页Transactions of Nonferrous Metals Society of China

基　　金：Project (20050513) supported by the Science and Technology Development Program of Jilin Province, China

摘　　要：The mechanical alloying process of Ti-Al composite powders were carried out by use of high energy ball-milling machine. Structure variations of powder mixtures during mechanical alloying and characteristic of spark plasma sintering were investigated. The results show that during milling,TiAl,Ti3Al and Ti2Al phase intermetallic compounds are formed,simultaneously with powder refinement for the(TiH2-45Al-0.2Si-5Nb) and(TiH2-45Al-0.2Si-7Nb) mixtures. The particle sizes of two powder mixtures are less than 300 nm after milling for 30 h. Sintering process of the milled powder can be completed in a short time by spark plasma sintering,and the sintering microstructure is composed of fine and homogeneous TiAl and Ti3Al phase.The mechanical alloying process of Ti-Al composite powders were carried out by use of high energy ball-milling machine. Structure variations of powder mixtures during mechanical alloying and characteristic of spark plasma sintering were investigated. The results show that during milling, TiAl, Ti3Al and Ti2Al phase intermetallic compounds are formed, simultaneously with powder refinement for the （TiH2-45Al-0.2Si-SNb） and （TiH2-45Al-0.2Si-7Nb） mixtures. The particle sizes of two powder mixtures are less than 300 nm after milling for 30 h. Sintering process of the milled powder can be completed in a short time by spark plasma sintering, and the sintering microstructure is composed of fine and homogeneous TiAl and Ti3Al phase.

关 键 词：机械合金化 钛铝金属间化合物 火花等离子体烧结 微观结构 

分 类 号：TF124.5[冶金工程—粉末冶金]