An optimized method for synthesizing phase-pure Ti3AlC2 MAX-phase through spark plasma sintering
An optimized method for synthesizing phase-pure Ti3AlC2 MAX-phase through spark plasma sintering
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DOI：
10.1016/j.jeurceramsoc.2021.10.030
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发表时间：
2021-10
影响因子：
5.7
通讯作者：
M. Yunus;Rakesh Kumar;B. Maji;M. Krishnan
中科院分区：
文献类型：
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作者：
M. Yunus;Rakesh Kumar;B. Maji;M. Krishnan
迄今为止，人们已经做了许多尝试来合成相纯的Ti_3AlC_2MAX相。但是，在最终产品中存在TiC和Ti-Al基金属间过渡杂质相所带来的挑战仍然是一个持续存在的问题。放电等离子烧结（SPS）技术是降低最终产品杂质含量最成功的方法。尽管如此，没有任何TiC和Ti-Al基金属间杂质的相纯的Ti 3AlC 2 MAX相的合成尚未实现并且在文献中报道有大量证据。此外，使用SPS技术合成的高纯度Ti 3AlC 2 MAX相已经显示出在1350°C温度以上缺乏相和显微结构稳定性。在这项工作中，我们已经报道了一种优化的方法，通过SPS技术，使用商业级的Ti，Al和C元素粉末制备相纯的Ti 3AlC 2 MAX相（具有大于99%的纯度）。最终产物还在流动氩气惰性气氛下显示出高达1500°C的非常好的高温稳定性。
So far many attempts have been made to synthesize phase-pure Ti3AlC2MAX-phase. But still the challenge posed by the presence of TiC and Ti-Al based intermetallic transient impurity phases in the final product is a persisting problem. Spark plasma sintering (SPS) technique has been the most successful method to decrease the impurity content of the final product. Even so, synthesis of phase-pure Ti3AlC2MAX-phase, without any TiC and Ti-Al based intermetallic impurities, has not been achieved and reported in literature with substantial evidences. Further, high purity Ti3AlC2MAX-phase synthesized using SPS technique has shown lack of phase and microstructural stability above 1350°C temperature. In this work, we have reported an optimized method for producing phase-pure Ti3AlC2MAX-phase (having more than 99 % purity) using commercial grade Ti, Al and C elemental powders through SPS technique. The final product also showed very good high temperature stability up to 1500°C under flowing Argon inert atmosphere.