Abstract

In this study, the effects of different treatments (annealing, solid solution and Solution + aging) on the bending and thermal conductivity of SiC_p/Al composites fabricated by the pressure infiltration method were investigated. The fracture form of the composites was indicated to be characteristic brittle fracture with local ductile fracture. The bending strength of the composites was 674 MPa with Solution + aging, which is 57% higher than that in the as-cast condition. The microhardnesses of the composites increased after heat treatment, resulting in the maximum microhardness 276 HV with Solution + aging. By calculating the thermal conductivity of the composites, the order was determined to be cast < annealed < solid solution < solution + aging, and the thermal conductivity with solution + aging treatment reached 182 m^–1 K^–1, which is higher than 153 m^–1 K^–1 in the as-cast condition.

中文翻译：

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热处理工艺对SiCp/AL复合材料性能的影响

摘要

在这项研究中，不同处理（退火、固溶和固溶+时效）对 SiC _{p弯曲和导热系数的影响}研究了压力浸渗法制备的/Al复合材料。复合材料的断裂形式为特征性脆性断裂和局部韧性断裂。固溶+时效时复合材料的抗弯强度为674 MPa，比铸态时高57%。热处理后复合材料的显微硬度增加，导致溶液+时效的最大显微硬度为276 HV。通过计算复合材料的热导率，确定浇注<退火<固溶<固溶+时效处理的顺序，固溶+时效处理的热导率达到182 m ^–1 K ^–1，高于153 m ^–1千^–1在铸态。