Synthesis of Ternary Machinable Ti<sub>2</sub>AlC Ceramics by In-situ Reaction

Liu Bobo1; Wang Fen1; Zhu Jianfeng1; Li Yaling2

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Synthesis of Ternary Machinable Ti₂AlC Ceramics by In-situ Reaction
Vol. 29, Issue 7, Pages: 644-646(2009)
Published： 2009 ，
DOI：

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[1]刘波波,王芬,朱建锋,李亚玲.Ti_2AlC三元可加工陶瓷原位反应合成的研究[J].特种铸造及有色合金,2009,29(07):644-646+585.

Liu Bobo1, Wang Fen1, Zhu Jianfeng1, et al. Synthesis of Ternary Machinable Ti₂AlC Ceramics by In-situ Reaction. [J]. Special Casting & Nonferrous Alloys 29(7):644-646(2009)
[1]刘波波,王芬,朱建锋,李亚玲.Ti_2AlC三元可加工陶瓷原位反应合成的研究[J].特种铸造及有色合金,2009,29(07):644-646+585. DOI：

Liu Bobo1, Wang Fen1, Zhu Jianfeng1, et al. Synthesis of Ternary Machinable Ti₂AlC Ceramics by In-situ Reaction. [J]. Special Casting & Nonferrous Alloys 29(7):644-646(2009) DOI：

摘要

以Ti粉、Al粉和活性炭粉体为原料

采用高能球磨及真空热压烧结技术制备纯度较高的Ti2AlC陶瓷

通过DSC、XRD等测试手段研究了该工艺的反应合成过程

并重点分析了Al含量对反应过程及材料微结构的影响。结果表明

Al含量对合成Ti2AlC陶瓷有很大的影响

当体系中Al含量为28%时

在氩气保护下高能球磨12h

形成以Ti、TiC和Ti-Al金属间化合物为主的复合粉体

该复合粉体在1300℃真空热压烧结即可获得单一物相Ti2AlC块体。

Abstract

The microstructural ternary layered single phase Ti2AlC ceramics was synthesized by high energy milling and vacuum hot-pressing sintering using Ti

Al and reactive carbon powders as raw materials. The in-situ reaction process and effects of Al content on the reaction and microstructure of the ceramics were examined by DSC

XRD （X-ray diffraction） and SEM （scanning electron microscope）. The results show that Al content has remarkable effects on the synthesis of high purity Ti2AlC ceramics. With 28% Al content

the Ti

TiC and Ti-Al intermetallics composites were formed by high energy milling for 12 hours in Ar atmosphere

and the single phase Ti2AlC ceramics was successfully prepared by hot-presses sintering the composites at 1300℃.