Influence of SiCp Surface Treatment on the SiCp/Al-30Si Microstructure and Performance

Abstract:

α-SiC particles have been processed with surface treatment of high-temperature calcination and water washing technology. SiCp/Al-30Si composite has been prepared in the vacuum hot extrusion process. The powder morphology and specimens microstructure have been observed using scanning electron microscopy, the phase of SiC has been analyzed using the X-ray diffraction. Meanwhile, the tensile strength and thermal expansion coefficient of the composite have been tested. The effects of the morphology of the SiC particles, tensile strength and thermal expansion coefficient have been studied on composite microstructure. The consequences show that, after the surface treatment SiCp/Al-30Si composite，the interfaces combined with matrix are in a better condition and less holes, the tensile strength of composite materials has been improved significantly, the coefficient of thermal expansion becomes lower than before.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 326-330
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.326
• Online since: June 2012
• Authors: Zeng Lei Ni, Ai Qin Wang, Jing Pei Xie, Ming Fang, Li Jun Zhang
• Keywords: Microstructure, SiCp Surface Treatment, SiCp/Al-30Si Composite, Tensile Strength, Thermal Expansion Coefficient, Vacuum Hot Extrusion

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