摘要
实验表明在Ti-Al-C体系中,C含量对燃烧合成Ti_3AlC_2影响很大:C含量(原子分数)较低时(22.64%—28.07%),燃烧产物主要物相为Ti_2AlC;C含量较高时(29.31%—32.79%),燃烧产物主要物相为Ti_3AlC_2.Ti_3AlC_2的燃烧合成反应温度高于Ti_2AlC的燃烧温度,Ti_3AlC_2的生成量随燃烧反应温度升高近似呈对称分布。从反应物原料摩尔配比和热力学原理角度,探讨了不同C含量对燃烧产物组成的影响机理。
The experiment results show that the amount of Ti3AlC2 in the combustion products is affected considerably by content of C in raw mixtures. Ti2AlC is the main phase in the combustion products under the condition of relatively low content of C (22.64%-28.07%, atomic fraction), while Ti3AlC2 is obtained as the main phase in the case of high content of C(29.31%-32.79%). The combustion synthesis reaction temperature of Ti3AlC2 is higher than that of Ti2AlC, and the amount of Ti3AlC2 in combustion products exhibites approximately symmetry distribution with the rise of reaction temperature. The above experimental phenomena were explained by both molar ratio of the raw materials and thermodynamic analysis.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期409-413,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金50102002