Al-Ti-TiO_2体系燃烧合成及其反应过程研究  

Investigation on Combustion Synthesis and Reaction Process of Al-Ti-TiO_2 System

作　　者：李志强[1] 曲伟[1] 韩杰才[1] 赫晓东[1] 

机构地区：[1]哈尔滨工业大学复合材料研究所,哈尔滨150001

出　　处：《无机材料学报》2002年第2期293-298,共6页Journal of Inorganic Materials

基　　金：哈尔滨工业大学校基金(HIT200041)

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．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.

关 键 词：自蔓延高温合成 Al-Ti-TiO2体系 复合材料 

分 类 号：TB39[一般工业技术—材料科学与工程]