Preparation and Anodizing of SiCp/Al Composites with Relatively High Fraction of SiCp.

Bin Wang,Xiaoqiang Li,Shengguan Qu

doi:10.1155/2018/8945729

Bin Wang, Xiaoqiang Li + Show 1 more

Open Access

https://doi.org/10.1155/2018/8945729

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Journal: Scanning	Publication Date: Jan 1, 2018
Citations: 1	License type: CC BY 4.0

Affiliation: South China University of Technology

Abstract

By properly proportioned SiC particles with different sizes and using squeeze infiltration process, SiCp/Al composites with high volume fraction of SiC content (Vp = 60.0%, 61.2%, 63.5%, 67.4%, and 68.0%) were achieved for optical application. The flexural strength of the prepared SiCp/Al composites was higher than 483 MPa and the elastic modulus was increased from 174.2 to 206.2 GPa. With an increase in SiC volume fraction, the flexural strength and Poisson's ratio decreased with the increase in elastic modulus. After the anodic oxidation treatment, an oxidation film with porous structure was prepared on the surface of the composite and the oxidation film was uniformly distributed. The anodic oxide growth rate of composite decreased with SiC content increased and linearly increased with anodizing time.

Highlights

The aluminum matrix composites reinforced by SiCp particles have been extensively applied in industry for their low density and high specific strength
SiCp/Al composite with relatively high SiC content are selected as structural substrates for a space mirrors [2]
Guo et al [3] analyzed that the closer the glass and matrix of thermal expansion coefficients between them, the better the combination

Summary

Introduction

The aluminum matrix composites reinforced by SiCp particles have been extensively applied in industry for their low density and high specific strength. In recent years, these materials with high fraction of SiCp particle (>60%) are used in space mirror, owing to their excellent thermal conductivity and low coefficient of thermal expansion (CTE) [1]. SiCp/Al composite with relatively high SiC content are selected as structural substrates for a space mirrors [2]. Zhang et al [4] prepared a plane mirror with an open back lightweight structure with SiCp/Al composite with a light advantage. In traditional process, compounding of composite and glass is operated under high temperature.

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