燃烧温度对燃烧合成Ti_3AlC_2和Ti_2AlC的影响  被引量:6

Effect of combustion temperature on combustion synthesis of Ti_3AlC_2 and Ti_2AlC

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作  者:郭俊明[1] 陈克新[1] 刘光华[1] 周和平[1] 宁晓山[1] 

机构地区:[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室

出  处:《功能材料》2004年第6期763-765,768,共4页Journal of Functional Materials

基  金:国家自然科学基金资助项目(50102002)

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。The experiment results show that the main phase of combustion products changes to Ti2A1C from Ti3AlC2 if TiC was added to the reactant mixtures as dilute agent without variation of overall Ti2A1C 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°C, while the Ti3AlC2 can still be formed.

关 键 词:燃烧合成 Ti-Al-C系 TI3ALC2 TI2ALC 

分 类 号:TM286[一般工业技术—材料科学与工程]

 

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