Mg对Al-Ti体系反应及产物形貌的影响  

Effects of Mg on Reaction Process and Morphology of Reaction Product in Al-Ti System

作　　者：鞠新庆[1] 王树奇[1] 杨子润[1] 陈康敏[1] 

机构地区：[1]江苏大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2009年第6期542-545,共4页Special Casting & Nonferrous Alloys

基　　金：江苏省高校自然科学指导性计划项目(06KJD430039);江苏大学创新团队启动基金

摘　　要：研究了Mg对Al-Ti体系反应、产物形貌和相对致密度的影响,并制备出Mg基复合材料。结果表明,Al-Ti体系的反应合成产物主要是Al3Ti。Mg的作用是降低了Al-Ti体系反应合成的起始温度,延迟了Al-Ti体系反应合成的起始时间;随着Mg含量的增加,Al-Ti体系产物的相对致密度不断提高,Mg的含量为75%时反应产物的相对致密度达到97.0%。Mg的存在使生成的Al3Ti颗粒细化,且颗粒圆整,分布均匀,采用Al-Ti体系原位反应生成的颗粒状Al3Ti增强Mg基复合材料,其颗粒尺寸为1～3μm,相对均匀分布在Mg基体上。Effects of Mg on reaction process,morphology and relative density of reaction products in Mg-Al-Ti system were investigated,and the Mg matrix composites were successfully prepared.The results reveal that the Al3Ti phase is dominant in reaction products in Mg-Al-Ti system.Mg element plays a role in decreasing initial temperature and in extending initial time of synthesized reaction of Mg-Al-Ti system.With increasing in Mg content,relative density of reaction products is obviously improved,where the relative density reaches 97.0% with 75% Mg content.In addition,created Al3Ti particles exhibiting round morphology and uniform distribution are refined with Mg addition.As a result,Al3Ti particle reinforced Mg matrix composites with 1~3 μm of Al3Ti which is relatively uniformly distributed in Mg matrix can be successfully fabricated by in-situ reaction synthesis in Mg-Al-Ti system.

关 键 词：Al—Ti体系 MG基复合材料 反应合成 显微组织 致密度 

分 类 号：O611.3[理学—无机化学]