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OALib Journal期刊
ISSN: 2333-9721
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粉末冶金制备SiCp/2009Al复合材料的相组成和元素分布
DOI: 10.3724/SP.J.1037.2011.00472, PP. 135-141
Keywords: 粉末冶金,铝基复合材料,相组成,挤压,元素分布
Abstract:
采用粉末冶金法制备SiCp/2009Al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,Al2Cu和Mg2Si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.
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