以钛、铝和碳黑单质粉末为反应物原料,在保持Ti∶Al∶C=2∶1∶1(摩尔比)不变的情况下,分别添加具有稀释剂作用的TiC,燃烧产物主晶相由Ti3AlC2变为Ti2AlC相,随着燃烧温度的降低,Ti2AlC相的含量逐渐增多.从热力学上考虑,生成Ti3AlC2的温度上限比生成Ti2AlC的温度上限宽.当燃烧反应温度超过1600℃时,Ti2AlC难以生成,而Ti3AlC2仍可生成.
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