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无机材料学报

无机材料学报

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Al-Ti-TiO2体系燃烧合成及其反应过程研究

李志强; 曲伟; 韩杰才; 赫晓东   

  1. 哈尔滨工业大学复合材料研究所 哈尔滨 150001
  • 收稿日期:2001-03-16 修回日期:2001-04-09 出版日期:2002-03-20 网络出版日期:2002-03-20

Investigation on Combustion Synthesis and Reaction Process of Al-Ti-TiO2 System

LI Zhi-Qiang; QU Wei; HAN Jie-Cai; HE Xiao-Dong   

  1. Center for Composite Materials; Harbin Institute of Technology; Harbin 150001; China
  • Received:2001-03-16 Revised:2001-04-09 Published:2002-03-20 Online:2002-03-20

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摘要： 利用Ａｌ－Ｔｉ－ＴｉＯ２体系放热反应，采用自蔓延高温合成工艺。原位合成了ＴｉＡｌ基体和Ａｌ２Ｏ３颗粒，成功制备出ＴｉＡｌ／Ａｌ２Ｏ３复合材料．结合差热分析，通过对不同温度下反应产物相组成分析；对Ａｌ－Ｔｉ－ＴｉＯ２体系燃烧反应过程进行了初步研究．结果表明，铝热还原反应是一个分步过程，先期发生的Ａｌ－Ｔｉ、Ｔｉ－ＴｉＯ２反应降低了Ａｌ－ＴｉＯ２还原反应的起始温度．

关键词: 自蔓延高温合成, Al-Ti-TiO2体系, 复合材料

Abstract: TiAl base composites reinforced by submicron Al2O3 particles were produced by Self-propagating High-temperature Synthesis (SHS) in use of the exothermic reaction of Al-Ti-TiO2 system. The reaction process was investigated with phase analysis of DTA samples quenched at different temperatures. The results indicate that the thermite reduction of TiO2 involves several transitional stages and its initiatory temperature is lowered by prior reactions between Al and Ti, Ti and TiO2.

Key words: SHS, Al-Ti-TiO2 system, composites

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