Combustion synthesis of ternary carbide Ti3AlC2 in Ti-Al-C system
Combustion synthesis of ternary carbide Ti3AlC2 in Ti-Al-C system
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DOI：
10.1016/s0955-2219(02)00098-5
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发表时间：
2003-03-01
影响因子：
5.7
通讯作者：
Ferreira, JMF
中科院分区：
文献类型：
--
作者：
Ge, ZB;Chen, KX;Ferreira, JMF
本文提出了一种燃烧合成法制备Ti3AlC2的方法。采用低成本的钛、铝和碳粉作为原料。研究了上述材料的初始配比对燃烧行为和最终产物相形成的影响。实验结果表明，燃烧反应通常倾向于形成碳化钛和铝的混合物。而通过调整元素粉末的初始比例或添加TiC作为添加剂，可以得到理想的Ti3AlC2产物。Ti3AlC2和Ti2AlC三元相的形成机制是前期形成的TiC晶溶入熔融的Ti-Al组成物中，由液相析出，形成层状三元相。(C) 2002 Elsevier Science Ltd.版权所有。
In the present work, a method for fabrication of Ti3AlC2 by combustion synthesis was developed. Low cost titanium, aluminum and carbon powders were used as raw materials. The effects of the initial ratio among the above-mentioned materials on the combustion behavior and phase formations in the final products were investigated The experimental results showed that the combustion reaction usually preferred to form a mixture of titanium carbide and aluminum. However, the desired product of Ti3AlC2 can be obtained through adjusting the initial ratio of the elemental powders or adding TiC as additives. The formation mechanism of ternary phases, Ti3AlC2 and Ti2AlC, is that the previously formed crystallites of TiC dissolve into the melting Ti-Al composition, and then, ternary phases precipitate from liquid phase and grow into layered morphology. (C) 2002 Elsevier Science Ltd. All rights reserved.