热爆合成Al-Ti-C组织转变规律的高温X射线衍射研究  

Microstructure Transformation of TE Synthesized Al-Ti-C by High Temperature X-ray Diffraction

作　　者：侯运丰[1] 夏天东 赵文军 

机构地区：[1]兰州理工大学机电工程学院,兰州730050 [2]甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《有色金属》2009年第2期4-7,共4页Nonferrous Metals

基　　金：国家“863”计划项目(2003AA33X050);兰州理工大学科研发展基金项目

摘　　要：采用高温X射线衍射原位观察Al-Ti—C热爆合成产物的物相变化，通过扫描电镜（SEM）分析合成产物的组织形貌，探讨热爆合成Al-Ti—C组织转变规律。结果表明，Al-Ti-C热爆合成反应过程分为Al熔化、Al-Ti反应生成Al3Ti、反应生成TiC三个阶段，反应温度对Al-Ti-C热爆合成产物成分与组织形貌有重要影响，800～1200℃合成产物均由Al，Al3Ti，TiC三相组成，800℃时在铝基体中析出细小块状Al3Ti，随反应温度升高而长大，1000℃时首先析出TiC粒子于铝基体中，进而1200℃时析出于Al3Ti表面。The phase transformation of thermal explosion synthesized Al-Ti-C at different temperature is investigated with high temperature X-ray diffraction, and the transformation features of the Al-Ti-C microstructure are discussed by morphological analysis of synthesized product by using SEM. The results show that the syntheses reaction goes through three stages, i.e. Al melting, Al3Ti forming by reaction of Al and Ti, and TiC forming. The Al-Ti-C reaction products are remarkably influenced by synthesis temperature. The reaction product is Al, Al3Ti and TiC phases at 800-1200℃. The Al3Ti is firstly formed in aluminum matrix at 800℃, the particle size of Al3Ti is increased with the increase Of syntheses temperature, then TiC phase is synthesized at 1000℃ . As the temperature rises to 1200℃, a certain amount of TiC appears on the Al3Ti surface.

关 键 词：金属材料 Al—Ti—C 高温X射线衍射 热爆合成 组织转变 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]