J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (06): 803-806.

• Articles • 上一篇    下一篇

浸渗-原位反应合成Cf/TiAl3复合材料Synthesis of Cf/TiAl3 composite by infiltration-in situ reaction

刘艳梅1;修子扬2;郭永良3;姜龙涛4;杨文澍5;武高辉4   

  1. 1. 哈尔滨工业大学
    2.
    3. Analysis and Measurement Center; Harbin Institute of Technology; Harbin 150001; China
    4. 哈尔滨工业大学金属基复合材料工程技术研究所
    5. 哈尔滨工业大学 材料科学与工程学院
  • 收稿日期:2008-09-22 修回日期:2009-02-10 出版日期:2009-11-28 发布日期:2009-11-24
  • 通讯作者: 刘艳梅
  • 基金资助:

    Foundation of Youth Scientific research of Shandong Province (No. 2006BS04035).

Synthesis of Cf/TiAl3 Composite by Infiltration-In Situ Reaction

Yanmei Liu1), Ziyang Xiu2), Yongliang Guo3), Longtao Jiang1), Wensu Yang1), Gaohui Wu1)   

  1. 1) School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
    2) Research Academy of Science and Industry Technology, Harbin Institute of Technology, Harbin 150001, China
    3) Analysis and Measurement Center, Harbin Institute of Technology, Harbin 150001, China
  • Received:2008-09-22 Revised:2009-02-10 Online:2009-11-28 Published:2009-11-24
  • Contact: Guohui Wu

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摘要：

以Ti粉、纯Al和碳纤维为原料，采用浸渗-反应合成法研制了Cf/ TiAl3复合材料。首先将Ti颗粒和碳纤维混合，而后压成预制块，再将熔融的纯Al压入预制块中，得到铸态材料，研究了铸态复合材料在原位反应过程中的微观组织演变和相组成。结果表明：在较低的反应温度下，TiAl3是主要的生成相，同时也有少量的Al4C3生成。而在较高的温度下，TiAl3为不稳定相，随着TiAl3的消失，TiC生成。在最终的产物中，有TiAl3，TiC和Al4C3共存，因而 Ti-Al-C系复合材料的原位反应过程遵循反应-分解-析出机制。

关键词: 复合材料, Ti-Al系金属间化合物, 原位反应, 微观组织

Abstract:

Infiltration-in situ reaction synthesis of Cf/TiAl3 composite was investigated. The as-cast material was obtained by titanium particles, carbon fibers and pure aluminum. Titanium particles and carbon fibers were mixed and pressed to form a preform firstly, and then molten pure aluminum was pressed into the preform, subsequently, cooled rapidly. In situ reaction samples were obtained by heating the as-cast material from 600 to 1000°C for 1 h. The microstructural evolution of in situ reaction samples was analyzed by scanning electron microscopy and energy dispersive X-ray. In addition, the phase composition of products was inspected by X-ray diffraction. Experimental results showed that the dominant product of TiAl3 and a small amount of Al4C3 were formed at low temperature. While TiAl3 was not stable at high temperature, along with its decrease, TiC phase became favorable. In the final products, TiAl3, TiC and Al4C3 were detected. Thus, the in situ reaction for Ti-Al-C system composite proceeded a formed-decomposed-precipitated mechanism.

Key words: Composites, Ti-Al Intermetallics, In situ reaction, Microstructure