Influence of SiC, Si3N4 and Al2O3 particles on the structure and properties of electrodeposited Ni

Srivastava, Meenu and William Grips, VK and Rajam, KS (2008) Influence of SiC, Si3N4 and Al2O3 particles on the structure and properties of electrodeposited Ni. Materials Letters, 62 . pp. 3487-3489. ISSN 0167-577X

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    Abstract

    The structure and properties of electrodeposited nickel composites reinforced with inert particles like SiC, Si3N4 and Al2O3 was compared. A comparison was made with respect to structure, morphology, microhardness and tribological behaviour. The coatings were characterized with optical microscopy, Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDX) and X-ray diffraction (XRD) technique. The cross-sectional microscopy studies revealed that the particles were uniformly distributed in all the composites. However, a difference in the surface morphology was revealed from SEM studies. The microhardness studies revealed that Si3N4 reinforced composite showed higher hardness compared to SiC and Al2O3 composite. This was attributed to the reduced crystallite size of Ni - 12nm compared to 16nm (SiC) and 23nm (Al2O3) in the composite coating. The tribological performance of these coatings studied using a Pin-on-disk wear tester, revealed that Si3N4 reinforced composite exhibited better wear resistance compared to SiC and Al2O3 composites. However, no significant variation in the coefficient of friction was observed for all the three composites.

    Item Type: Journal Article
    Uncontrolled Keywords: Coatings, Composites, Hardness, Microstructure, Wear
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    CHEMISTRY AND MATERIALS > Composite Materials
    Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division
    Depositing User: Meenu Srivastava Meenu
    Date Deposited: 09 Aug 2010 09:40
    Last Modified: 09 Aug 2010 09:40
    URI: http://nal-ir.nal.res.in/id/eprint/8907

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