Reactive synthesis of microporous titanium-aluminide membranes
Reactive synthesis of microporous titanium-aluminide membranes
复制标题
微孔钛铝化物膜的反应合成
DOI：
10.1016/j.matlet.2008.08.053
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发表时间：
2009-01-15
影响因子：
3
通讯作者：
Liu, C. T.
中科院分区：
文献类型：
--
作者：
Jiang, Yao;Deng, Chuping;Liu, C. T.
钛铝金属间合金和化合物传统上被研究并用作高温应用中的结构材料。在这里，我们展示了一个新领域，其中通过反应合成涂有钛层的商用铝箔来制备厚度约20μm的微孔钛铝膜。先在550℃下烧结4h，最后在1300℃下烧结30min，形成平均孔径约为1.2μm的多孔膜，呈γ-TiAl单相。通过扫描电子显微镜研究和分析了合成过程中的孔演化。根据 Ti/Al 扩散偶实验 (C) 2008，Elsevier B.V. 出版，孔隙形成机制被认为是 Kirkendall 效应。
Titanium-aluminide intermetallic alloys and compounds are traditionally investigated and used as structural materials in high temperature applications. Here we show a novel field where microporous titanium-aluminide membrane with about 20 mu m thickness was prepared by a reactive synthesis of a commercial aluminum foil coated with a titanium layer. The porous membrane with the average pore size of about 1.2 mu m formed after sintering initially at 550 degrees C for 4 h and finally at 1300 degrees C for 30 min, showing a single phase of gamma-TiAl. The pore evolution during the synthesis procedure was investigated and analyzed through scanning electron microscopy. The pore formation mechanism is believed to be the Kirkendall effect according to a Ti/Al diffusion couple experiment (C) 2008 Published by Elsevier B.V.