Effects of Electroless Copper Plating on Surface of SiC<sub>p</sub> on Microstructure and Properties of Al-matrix Composites

An Yi; Yan Fengyun; Chen Tijun

doi:10.15980/j.tzzz.2021.10.021

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Effects of Electroless Copper Plating on Surface of SiC_p on Microstructure and Properties of Al-matrix Composites
Vol. 41, Issue 10, Pages: 1289-1294(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.10.021

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An Yi, Yan Fengyun, Chen Tijun. Effects of Electroless Copper Plating on Surface of SiC_p on Microstructure and Properties of Al-matrix Composites. [J]. Special Casting & Nonferrous Alloys 41(10):1289-1294(2021)
DOI：

An Yi, Yan Fengyun, Chen Tijun. Effects of Electroless Copper Plating on Surface of SiC_p on Microstructure and Properties of Al-matrix Composites. [J]. Special Casting & Nonferrous Alloys 41(10):1289-1294(2021) DOI： 10.15980/j.tzzz.2021.10.021.

摘要

采用化学镀覆的方法对SiC

表面进行镀Cu处理

以2024铝合金为基体

通过直热法粉末触变成形工艺制备了SiC

体积分数为60%的Al基复合材料

研究了Cu镀层对复合材料显微组织、相组成、断裂行为、抗弯强度和热膨胀系数的影响。研究发现

SiC

经过镀Cu处理后

复合材料的组织由AlCu、Al

Cu为主的金属间化合物组成

对复合材料的性质和性能产生了较大影响。新相AlCu、Al

Cu的出现

显著降低了复合材料的热膨胀系数。与未镀Cu的SiC

/2024Al复合材料相比

镀Cu后复合材料的致密度为99.15%

提高了1.57%;热膨胀系数为5.73×10

-6

-1

降低了32.4%;抗弯强度为283 MPa

降低了10.2%。

Abstract

The surface of SiC

was coated with Cu by electroless plating method. Taking 2024 Al alloy as the matrix

60%SiC

/Al-matrix composites were prepared by direct-heating powder thixoforming process

and the effects of Cu coating on the microstructure

phase composition

fracture behavior

flexural strength and thermal expansion coefficient of composite were investigated. The results indicate that after Cu plating

the matrix of the composite is composed of intermetallic compounds dominated by AlCu and Al

which has a greater impact on the properties and performance of the composites. The thermal expansion coefficient is significantly reduced due to the appearance of new phases AlCu and Al

Cu in the matrix. Compared with the SiC

/2024 Al composite without copper plating

the relative densities of the material after copper plating are 99.15%

which is increased by 1.57%. The coefficients of thermal expansion are 5.73×10

-6

-1

which is reduced by 32.4%. The flexural strength are 283 MPa

which is reduced by 10.2%.