Fabrication of Al<sub>3</sub>Ti/Al Composites by In-situ Reaction

Huo Xiaowei; Wang Shuqi; Chen Kangmin

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Fabrication of Al₃Ti/Al Composites by In-situ Reaction
Issue 7, Pages: 547-550(2007)
Published： 2007 ，
DOI：

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[1]霍小卫,王树奇,陈康敏.熔体内原位制备Al_3Ti增强铝基复合材料的研究[J].特种铸造及有色合金,2007(07):547-550+490-491.

Huo Xiaowei, Wang Shuqi, Chen Kangmin. Fabrication of Al₃Ti/Al Composites by In-situ Reaction. [J]. Special Casting & Nonferrous Alloys (7):547-550(2007)
[1]霍小卫,王树奇,陈康敏.熔体内原位制备Al_3Ti增强铝基复合材料的研究[J].特种铸造及有色合金,2007(07):547-550+490-491. DOI：

Huo Xiaowei, Wang Shuqi, Chen Kangmin. Fabrication of Al₃Ti/Al Composites by In-situ Reaction. [J]. Special Casting & Nonferrous Alloys (7):547-550(2007) DOI：

摘要

5Al-Ti体系粉末压坯在铝液中原位反应

经搅拌浇注后制备出Al3Ti颗粒增强的铝基复合材料。分析了5Al-Ti体系粉末的反应过程及热力学

探讨了工艺参数对复合材料微观组织形态的影响及形成机理。研究发现

5Al-Ti体系粉末在850℃预热时

发生剧烈的热爆反应生成Al3Ti;压坯在铝液中预热经搅拌浇注后Al3Ti颗粒在铝基体上呈细小块状和短棒状分布

复合材料硬度随着Al3Ti颗粒含量的增多而提高;合适的搅拌工艺有助于Al3Ti颗粒在铝基体上的均匀分布。

Abstract

Al3Ti particles reinforced Al matrix composites have been prepared by in-situ SHS synthesis in 5Al-Ti system.The reaction mechanism and therodynamics of 5Al-Ti powder blocks were described

and effects of processing parameters on microstructure of the composites were investigated.The results reveal that in-situ Al3Ti particles can be created at 850 ℃ in 5Al-Ti system

which exhibits fine blocks and short rods and uniformly distributes into the Al matrix.The hardness of the composites can be increased with the increase of Al3Ti particles content.In addition

the rational stirring way is beneficial for the uniform distribution of the Al3Ti particles in the composites.