Phase segregation of titanium-aluminium carbide (Ti2AlC) at high pressure and high temperature

Phase segregation of titanium-aluminium carbide (Ti2AlC) at high pressure and high temperature
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高压高温下碳化钛铝(Ti2AlC)的相偏析

DOI:
10.1016/j.jallcom.2007.08.032
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发表时间:
2008-08
影响因子:
6.2
通讯作者:
--
中科院分区:
材料科学2区
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--
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采用X射线衍射(XRD)、差示扫描量热法(DSC)、扫描电镜(SEM)和能谱分析(EDXA)等方法研究了钛铝碳化物(Ti 2AlC)的高温高压行为和相稳定性。结果表明,Ti 2AlC的分解温度随压力的增大而降低。在3、4和5GPa压力下,Ti_2Al_C相分离的低温极限分别为1300 ~ 1200 ℃、1100 ~ 1000 ℃、900 ~ 800 ℃。分解产物经鉴定为碳化钛和钛铝。
The high pressure and high temperature (HPHT) behavior and phase stability of titanium-aluminium carbide (Ti2AlC) were investigated using X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron micrograph (SEM), and energy-dispersive X-ray analysis (EDXA). The results show that the decomposition temperature of Ti2AlC decreases against pressure. At pressures of 3, 4 and 5GPa, the low temperature limits of phase segregation of the sample Ti2AlC lie between 1300 and 1200°C, 1100 and 1000°C, 900 and 800°C, respectively. The decomposition products are identified to be titanium carbide and titanium aluminium.
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