【摘要】 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。更多还原

【Abstract】 The experiment results show that the main phase of combustion products changes to Ti₂AlC from Ti₃AlC₂ if TiC was added to the reactant mixtures as dilute agent without variation of overall Ti₂AlC stoichiometry by using Ti, Al and C powders as raw materials. The amount of Ti₂AlC was increased with decreasing combustion temperature. From chemical thermodynamics principle, the combustion temperature upper limit to formation of Ti₃AlC₂ was much higher than that to Ti₂AlC. The Ti₂AlC was difficult to form when the combustion temperature was above 1600℃, while the Ti₃AlC₂ can still be formed.更多还原