不同钛碳摩尔比和铝含量对Ti-Al-C体系燃烧合成Ti_3AlC_2粉体的影响  

Effects of Different Ti/C and Al Contents on Combustion Synthesized Ti_3AlC_2 Powders in the Ti-Al-C System

作　　者：郭俊明[1,2] 陈克新[1] 葛振斌[1] 周和平[1] 宁晓山[1] 

机构地区：[1]清华大学 [2]蒙自师范高等专科学校,云南蒙自661100

出　　处：《稀有金属材料与工程》2003年第7期561-565,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(50102002)

摘　　要：以Ti,Al,C和TiC粉末为原料,研究了钛碳摩尔比和Al含量对Ti-Al-C体系燃烧合成产物相组成的影响。实验表明,不同的钛碳摩尔比和Al含量变化,对Ti-Al-C体系燃烧合成Ti3AlC2粉体有很大影响。当Ti/C=1或1.5时,燃烧产物主晶相是TiC,与原料中Al含量变化关系不大;Ti/C=2和Ti/C=3时,主晶相分别是Ti3AlC2和Ti2AlC,它们的衍射峰强度均分别随原料中Al含量增加而增强,当Al含量增加到一定量后,Ti3AlC2和Ti2AlC的衍射峰强度均又减弱;TiC是Ti-Al-C体系燃烧合成TiAlC相的中间产物。The effect of Ti/C (molar ratio) and Al content on phase constitution of combustion synthesized products by using Ti, Al, C and TiC powders as raw materials in the Ti-Al-C system has been studied. The experiment results show that the phase formation of combustion synthesized Ti3AlC2 powders are affected greatly by molar ratio of titanium to carbon and Al content in the raw materials. TiC is the main phase in the final product as the molar ratio of titanium to carbon is equal to 1 or 1.5, with little relationship to the amount of aluminum content. The Ti3AlC2 and Ti2AlC are the main phases in the final product as the molar ratio of titanium to carbon are equal to 2 and 3, respectively. Moreover, amounts of Ti3AlC2 and Ti2AlC increase in direct ratio with Al content, and later decrease with continuously increasing amount of Al. TiC is a medium product during the combustion process for the purpose of obtaining Ti3AlC2 powders.

关 键 词：燃烧合成 TI3ALC2 Ti—Al-C系 

分 类 号：TB39[一般工业技术—材料科学与工程]