Heat treatment of spray deposition SiCp/6066 aluminum matrix composites

Abstract

Heat treatment of spray deposition 10% SiCp/6066 (ϕ(SiCp) = 10%) composites was investigated by means of hardness measurement. The results show that heat treatment technology is influenced by the presence of SiC particles. Compared with the base alloy 6066, the composites have lower burning temperature and is burnt at 540 °C due to the enrichment of Mg and Cu atoms in the SiCp/6066 interfaces. As a result, solution treatment of the composites should be carried out at lower temperature. The aging parameter values such as the aging temperature, the precipitation temperature of β′ and β phases, as well as the peak aging time, become lower. The optimum heat treatment process conditions are that the composites are solution-treated at 515 °C and aged at 165 °C for 5 h.

Keywords

spray deposition / composites / solution-treatment temperature / aging

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