April 18, 2024
Ali Shanaghi

Ali Shanaghi

Academic rank: Associate Professor
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Education: Ph.D in eng
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Faculty: Technical Engineering

Research

Title Role of Etching Process of SiC Particles on the Microstructure and Mechanical Properties of Stir Casted Al 357−SiC Metal matrix Composite
Type Article
Keywords
Electromagnetic Stir Casting Etching Aluminum Matrix Composites Micron-Sized SiC Mechanical Properties
Journal Advanced Ceramics Progress
Researchers Ali Shanaghi

Abstract

Owing to their high strength-to-weight ratio, aluminum-ceramic composites, are widely used in various industries. In this study, aluminum matrix composite was fabricated with only 2 wt% micron-sized SiC particles as the reinforcing phase using electromagnetic stir casting. Prior to mixing, the surface of SiC particles were chemically etched by HF, NaOH, and KOH at two heat treatment temperatures of 460 and 510 °C for 30 min. The obtained results indicated better wettability and interaction between the etched SiC particles and Al matrix. In addition, etched SiC particle as a ceramic phase at 460 °C enhanced the mechanical properties of Al as a metal matrix, such as enhancing hardness and E about of 6.6 and 26.6%, respectively, mainly due to the increasing inhibition against movement of dislocation confirmed by the observed brittle behavior of fracture surface.