Abrasive wear resistance of electroless Ni-P coated aluminium after post treatment

Raj Rajendran, Wei Sha, R. Elansezhian

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Electroless nickel (EN) coatings are recognised for their hardness and wear resistance in automotive and aerospace industries. In this work, electroless Ni–P coatings were deposited on aluminium alloy substrate LM24 (Al–9 wt.% Si alloy) and the effect of post treatment on the wear resistance was studied. The post treatments included heat treatment and lapping with two different surface textures. Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and micro-abrasion tester were used to analyse morphology, structure and abrasive wear resistance of the coatings. Post heat treatment significantly improved the coating density and structure, giving rise to enhanced hardness and wear resistance. Microhardness of electroless Ni–P coatings with thickness of about 15 μm increased due to the formation of Ni3P after heat treatment.
    Original languageEnglish
    Pages (from-to)766-772
    Number of pages7
    JournalSurface and Coatings Technology
    Volume205
    Issue number3
    Early online date10 Aug 2010
    DOIs
    Publication statusPublished - 25 Oct 2010

    Keywords

    • Amorphous materials
    • Coating materials
    • Electroless plating
    • Phase transitions
    • Scanning electron microscopy
    • Surface morphology

    ASJC Scopus subject areas

    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

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