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Effect of nanometer SiC coating on thermal conductivity and bending strength of graphite flake/6063Al composites
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jallcom.2020.158023
T. Li , Z.Y. Liu , Y.N. Zan , X.Y. Liu , W.G. Wang , D. Wang , B.L. Xiao , Z.Y. Ma

Abstract SiC coating on graphite flake (Gf) was prepared by SiO2 sol-gel method combining with in-situ reaction. Then, the SiC coated graphite flakes reinforced 6063Al (SiC@Gf/6063Al) composites were fabricated by vacuum hot pressing method. The results demonstrated that the SiC coating with a thickness of about 15 nm on the Gf could effectively improve the wettability, reduce the interface thermal resistance, and enhance the bonding between Gf and Al matrix. As a result, the bending strength as well as the thermal conductivity of the SiC@Gf/6063Al composites was much higher than those of the Gf/6063Al composites. Especially, the 50 vol.% SiC@Gf/6063Al had the highest bending strength of 52.5 MPa, and the thermal conductivity of the 70 vol.% SiC@Gf /6063Al reached the highest value of 731.4 W·m-1·K-1.

中文翻译:

纳米碳化硅涂层对石墨片/6063Al复合材料热导率和弯曲强度的影响

摘要 采用SiO2溶胶-凝胶法结合原位反应制备石墨片(Gf)上的SiC涂层。然后,采用真空热压法制备了SiC包覆石墨片增强6063Al(SiC@Gf/6063Al)复合材料。结果表明,在 Gf 上涂覆约 15 nm 厚度的 SiC 涂层可以有效提高润湿性,降低界面热阻,增强 Gf 与 Al 基体之间的结合。因此,SiC@Gf/6063Al 复合材料的弯曲强度和热导率远高于 Gf/6063Al 复合材料。特别是50 vol.% SiC@Gf/6063Al的弯曲强度最高为52.5 MPa,70 vol.% SiC@Gf /6063Al的热导率最高达到731.4 W·m-1·K- 1.
更新日期:2020-11-01
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