摘要
以Ti_3SiC_2作为外加增强相,Al-Mg合金为基体,通过放电等离子烧结法(SPS)制备了Ti_3SiC_2/Al-Mg复合材料,并研究了后续热处理对界面反应的影响。结果表明,SPS法能成功制得Ti_3SiC_2/Al-Mg复合材料,热处理过程中温度是影响界面反应是否发生的重要因素。当温度低于550℃时,未发生界面反应;温度达到600℃时,发生轻微的界面反应,主要产物是Al4C3和Mg2Si。界面反应的发生导致材料硬度增大,密度和导电率降低。此外,随着基体中Mg含量的增加,Ti_3SiC_2/Al-Mg复合材料的晶粒尺寸逐渐减小,硬度逐渐增大。
Using Ti3SiC2 as the external strengthening phase and Al-Mg alloy as the matrix,Ti3SiC2/Al-Mg composites were prepared by spark plasma sintering（SPS）.The effect of subsequent heat treatment on interfacial reaction was researched.The results show that Ti3SiC2/Al-Mg composites can be prepared successfully by SPS,and insulation temperature is a key factor affecting interfacial reaction during heat treatment.When the temperature is lower than 550℃,no interfacial reaction occurs.When the temperature reaches 600 ℃,a slight interfacial reaction occurs,and the main products are Al4 C3 and Mg2 Si.Interfacial reaction leads to an increase of material hardness,but a decrease of the density and conductivity.In addition,with the increase of Mg content in the matrix,the grain size of Ti3SiC2/Al-Mg composites gradually decreases and the hardness gradually increases.
出处
《稀有金属与硬质合金》
CSCD
北大核心
2017年第6期59-65,75,共8页
Rare Metals and Cemented Carbides
基金
国家自然科学基金(51461017
51561008)
江西省自然科学基金(20161BAB206137
20171ACB21044)
