不同铝含量对Ti-Al-C系燃烧合成Ti_3AlC_2粉体的影响  

EFFECTS OF DIFFERENT Al CONTENTS ON COMBUSTION SYNTHESIS OF Ti_3AlC_2 POWDERS IN THE Ti-Al-C SYSTEM

作　　者：郭俊明[1] 陈克新[1] 周和平[1] 宁晓山[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室

出　　处：《复合材料学报》2004年第3期59-62,共4页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金资助项目(50102002);清华大学新型陶瓷与精细工艺国家重点实验室开放课题资助项目

摘　　要：　采用Ti、Al、C和TiC粉末为反应物原料,研究了Ti∶C=3∶2时,不同Al含量(12.3%～25.4%,atomicfraction)对Ti-Al-C体系燃烧合成Ti3AlC2粉体的影响。探讨了Al含量对燃烧合成Ti3AlC2的影响机理。实验表明,Al含量对Ti-Al-C体系燃烧合成Ti3AlC2影响较大,Ti3AlC2的含量随Al含量(12.3%～19.4%)增加而增加,但在Al含量为20.6%～25.4%时,却随Al含量的增加而降低。Effects of different Al contents(12.3%-25.4%, atomic fraction) on combustion synthesis of Ti3AlC2 powders were studied by using Ti, Al, C and TiC powders as raw materials in the Ti-Al-C system when the molar ratio of Ti/C was equal to 3:2. The formation mechanism of Ti3AlC2 was investigated for different Al contents in the raw materials. The experiment results show that the phase formation of combustion synthesized Ti3AlC2 is affected greatly by the Al content in the raw materials. The amount of Ti3AlC2 in combustion products firstly increases with increasing Al content (12.3%-l9.4%), and then decreases with continuously increasing amount of Al(20.6%-25.4%).

关 键 词：燃烧合成 TI3ALC2 Ti—A1-C系 Al 显微结构 

分 类 号：TM286[一般工业技术—材料科学与工程]