Self-propagating high-temperature synthesis of Ti3AlC2 MAX phase from mechanically-activated Ti/Al/graphite powder mixture
Self-propagating high-temperature synthesis of Ti3AlC2 MAX phase from mechanically-activated Ti/Al/graphite powder mixture
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DOI：
10.1016/j.ceramint.2018.02.195
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发表时间：
2018-06-01
影响因子：
5.2
通讯作者：
Schmidt, Gert
中科院分区：
文献类型：
--
作者：
Akhlaghi, Maryam;Tayebifard, Seyed Ali;Schmidt, Gert
采用机械活化自蔓延高温合成工艺制备了碳化钛铝粉。研究了以元素钛、铝和碳(石墨)粉为原料，采用波传播和热爆技术合成Ti3AlC2 Max相的形成机理。用差热分析(DTA)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射仪(XRD)对燃烧反应产物进行了表征，虽然Ti3AlC2被认为是主要的合成产物，但在这两种技术中，TiC的生成也被证实是副产物。管式炉(热爆模式)合成的MAX相比反应室(波传播模式)合成的MAX相更纯净。结果表明，TiC和TiAl化合物的形成对燃烧合成Ti3AlC2 Max相具有重要作用。
Titanium aluminum carbide was prepared employing the mechanically-activated self-propagating high-temperature synthesis process. The formation mechanism of Ti3AlC2 MAX phase, synthesized using elemental titanium, aluminum, and carbon (graphite) powders via wave propagation and thermal explosion techniques, was investigated. The combustion reaction products were characterized by differential thermal analysis (DTA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD), Although Ti3AlC2 was recognized as the dominant synthesis product, in both techniques, the formation of TiC was also verified as a byproduct. The MAX phase produced in the tubular furnace (thermal explosion mode) was purer than that synthesized in the reaction chamber (wave propagation mode). The results disclosed that the formation of TiC and TiAl compounds have significant roles on the combustion synthesis of Ti3AlC2 MAX phase.