| Ti-Al-TiO_2体系的热力学分析及合成反应过程研究 |
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| 引用本文： | 艾桃桃,王芬.Ti-Al-TiO_2体系的热力学分析及合成反应过程研究[J].金属热处理,2009,34(1). |
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| 作者姓名： | 艾桃桃 王芬 |
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| 作者单位： | 1. 陕西理工学院材料学院,陕西,汉中,723003
2. 陕西科技大学材料科学与工程学院,陕西,西安,710021 |
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| 基金项目： | 陕两省教育厅专项科研项目，陕西理工学院引进人才科研启动项目 |
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| 摘 要： | 以Ti、Al和Ti02混合粉的原位反应制备Al203颗粒增强TiAl基复合材料.利用热力学机理分析了制备该种材料的可行性;用扫描电镜观察了合成产物的组织形态;借助差热变化曲线,对Ti-Al-Ti02体系的反应过程进行了初步研究.结果表明,Ti-Al-Ti02体系的反应能够原位生成Al203颗粒增强的TiAl基复合材料;Al203颗粒分布在基体晶界处,随其含量增大,基体晶粒逐渐细化;铝熔化后首先开始了TiAl3的生成反应,由于Ti02的稀释作用,使它的放热峰与Ti-Al体系的主放热峰相比有所滞后,紧接着发生了Al-Ti02的还原反应,由于其激活能低而速度较快,因此较早完成;若Al-Ti02的还原反应未进行彻底,部分TiAl3将分解以提供铝液;最后发生了TiAl3向TiAl和TiAl相转变的过程.
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| 关 键 词： | Ti-Al-TiO2体系 Al2O3颗粒 原位合成 反应过程 |
Thermodynamic analysis and synthetic reaction process of Ti-Al-TiO_2 composite |
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| AI Tao-tao,WANG Fen.Thermodynamic analysis and synthetic reaction process of Ti-Al-TiO_2 composite[J].Heat Treatment of Metals,2009,34(1). |
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| Authors: | AI Tao-tao WANG Fen |
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| Affiliation: | 1.Department of Materials Science and Engineering;Shaanxi University of Technology;Hanzhong Shaanxi 723003;China;2.School of Materials Science and Engineering;Shaanxi University of Science & Technology;Xi'an Shaanxi 710021;China |
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| Abstract: | In-situ Al2O3/TiAl base composites were fabricated by the chemical reaction with Ti,Al and TiO2 powders.The feasibility of the composite fabrication was analyzed by thermodynamic mechanism,the microstructures of the composites were observed by SEM,and the reaction process of Ti-Al-TiO2 composites was investigated by means of differential thermal analysis(DTA).The results show that the reaction of Ti-Al-TiO2 composite can form TiAl based composites reinforced by Al2O3 particles;Al2O3 particles distribute alo... |
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| Keywords: | Ti-Al-TiO2 system Al2O3 particle in situ synthesis reaction process |
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