Synthesis of High Pure Ti_3AlC_2 and Ti_2AlC Powders from TiH_2 Powders as Ti Source by Tube Furnace  

作　　者：李良 周爱国 XU Lin LI Zhengyang WANG Libo 

机构地区：[1]School of Materials Science and Engineering,Henan Polytechnic University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第5期882-887,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation of China(Nos.51002045,51205111);Program for Innovative Research Team(in Science and Technology)in the University of Henan Province(No.2012IRTSTHN007),IRTHPU(No.T2013-4);Opening Project of Henan Key Discipline Open Laboratory of Mining Engineering Materials(No.MEM12-5)

摘　　要：Titanium aluminum carbide （Ti3AlC2 and Ti2AlC） powders were synthesized from TiH2 powders instead of Ti powders as Ti source by a tube furnace under argon atmosphere without preliminary dehydrogenation. 95 wt% pure Ti3AlC2 powders were synthesized from TiH2/1.IAl/2TiC at 1 450 ℃ for 120 min. High-purity Ti2AlC powders were also prepared from 3TiH2/1.5Al/C and 2TiH2/1.5Al/TiC powders at 1 400 ℃ for 120 min. The as-synthesized samples were porous and easy to be ground into powders. Sn or Si additives in starting materials increased the purity of synthesized Ti3AlC2 obviously and expanded the temperature range for the synthesis of Ti3AlC2. With Si or Sn as additives, high pure Ti3AlC2 was synthesized at 1 200℃ for 60 min from TiH2/x Si/Al/2TiC and TiH2/x Sn/Al/2TiC （x = 0.1, 0.2）, respectively.Titanium aluminum carbide （Ti3AlC2 and Ti2AlC） powders were synthesized from TiH2 powders instead of Ti powders as Ti source by a tube furnace under argon atmosphere without preliminary dehydrogenation. 95 wt% pure Ti3AlC2 powders were synthesized from TiH2/1.IAl/2TiC at 1 450 ℃ for 120 min. High-purity Ti2AlC powders were also prepared from 3TiH2/1.5Al/C and 2TiH2/1.5Al/TiC powders at 1 400 ℃ for 120 min. The as-synthesized samples were porous and easy to be ground into powders. Sn or Si additives in starting materials increased the purity of synthesized Ti3AlC2 obviously and expanded the temperature range for the synthesis of Ti3AlC2. With Si or Sn as additives, high pure Ti3AlC2 was synthesized at 1 200℃ for 60 min from TiH2/x Si/Al/2TiC and TiH2/x Sn/Al/2TiC （x = 0.1, 0.2）, respectively.

关 键 词：TI3ALC2 Fi2A1C Till2 SN Si 

分 类 号：TB383.3[一般工业技术—材料科学与工程]