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采用粉末冶金法制备SiCp/2009AI复合材料热压锭,并对热压锭进行了热挤压,分析了热压态和挤压态复合材料的相组成和元素分布.结果表明:热压锭存在轻微的元素偏析,下部Cu和Mg含量略高于上部.热压态复合材料组成相主要为Al,SiC,Al2Cu和Mg2Si,另外还含有少量的Al7Cu2Fe和Mg的氧化物.经固溶处理后,Al_2Cu和Mg_2Si溶解,Cu在基体中均匀分布,但Mg仍偏聚于原始铝颗粒边界和SiC团聚处.挤压变形不改变复合材料的相组成,但使SiC分布更均匀并破碎了铝颗粒表面的氧化膜.挤压态复合材料经固溶处理后,Cu和Mg均在基体中均实现了均匀分布.
The SiCp / 2009AI composite hot-pressing ingot was prepared by powder metallurgy method and the hot-pressing ingot was hot-extruded. The phase composition and elemental distribution of hot-pressed and extruded composites were analyzed.The results showed that there were slight elements Segregation, the content of Cu and Mg in the lower part is slightly higher than that in the upper part.The composition of the hot-pressed composites is mainly composed of Al, SiC, Al2Cu and Mg2Si, and also contains a small amount of Al7Cu2Fe and Mg oxides.After solution treatment, Al2Cu and Mg2Si Dissolved in the matrix, but Cu still segregates at the boundaries of the original aluminum particles and the agglomeration of SiC.The extrusion deformation does not change the phase composition of the composites, but the distribution of SiC is more uniform and the oxide film on the surface of the aluminum particles is broken After solution treatment, both Cu and Mg were uniformly distributed in the matrix.