中文摘要：

采用无压渗透法制备了SiCp/Al-6%Mg（质量分数）复合材料,并对其进行4种热处理工艺（T1,T4,T6和退火）处理,研究了热处理工艺对SiCp/Al-6%Mg复合材料显微组织和腐蚀行为的影响。结果表明,复合材料在4种热处理工艺下均出现了界面反应产物Si、MgA12O4和Mg2Si。界面反应产物析出量（f）与热处理工艺密切相关,并呈现出如下规律：fT1jcorr-T6〉jcorr-T4〉jcorr-T1。

英文摘要：

The present work investigated the influence of heat treatment（T1, T4, T6 and annealing） on the microstructure related to the interfacial reaction and corrosion behavior of SiCp/Al-6wt%Mg composites prepared by a pressureless infiltration technique. The results show the occurrence of the precipitates of Si, MgA 12O4 and Mg2Si as a result of the interfacial reaction between the SiC particle and the matrix of the composites during heat treatment. The precipitates contents（f） of the composites correlate with T1, T4, T6 and annealing heat treatment, following the order of fT1 fT4 fT6 fannealing. The precipitates near SiC particles are responsible to pitting corrosion as a degradation mechanism of the composites. The heat treatments carried out on the composites present a significant influence on the corrosion rate（jcorr）. The correlation between jcorr and heat treatment shows the characteristic of jcorr-ann jcorr-T6 jcorr-T4 jcorr-T1, which may be attributed to the interfacial reaction precipitates of the composites during heat treatment.