Friction surfacing: Novel technique for metal matrix composite coating on aluminium

Abstract

The present work pertains to the study of wear and corrosion resistance of surface coating of SiC_p reinforced AA 2124 aluminium alloy composite onto the surface of aluminium alloy A356. In order to improve wear and corrosion resistance of A356 Al–Si alloy, SiC_p reinforced composite was coated on A356 Al–Si alloy substrate by friction surfacing technique. The coating was characterised by metallography, dry sliding wear and potentiodynamic polarisation testing. The present study revealed that aluminium alloys could be friction surfaced with metal matrix composites. The coating exhibited excellent wear resistance, which is attributed to the formation of strong metallurgical bond with the substrate. The coating was also found to have adequate corrosion resistance. The study assumes special significance as deposition of metal matrix composites utilising friction surfacing is reported for the first time.

Keywords

FRICTION SURFACING AL ALLOY METAL MATRIX COMPOSITE WEAR CORROSION MICROSTRUCTURE

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Friction surfacing: Novel technique for metal matrix composite coating on aluminium–silicon alloy

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