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.

Effect of Ti Doping on the Microstructure and Properties of SiCp/Al Composites by Pressureless Infiltration

“…These attributes make them ideally suited to meet the demanding performance requirements of advanced electronic packaging materials [5,6]. Several processes have been developed for the fabrication of SiC p /Al composites, mainly including pressure [7] or pressureless melt infiltration [8], extrusion casting [9], and powder metallurgy [10,11]. Among these, pressureless infiltration is an economical and efficient near-net-shape forming technique that combines material processing and part formation.…”