Surface Modification of SiC Reinforcements & Its Effects on Mechanical Properties of Aluminium Based MMC

Vanarotti, M and Shrishail, P and Sridhar, BR and Venkateswarlu, K and Kori, SA (2014) Surface Modification of SiC Reinforcements & Its Effects on Mechanical Properties of Aluminium Based MMC. Applied Mechanics and Materials, 446-44 . pp. 93-97. ISSN ISSN: 1662-7482

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    Abstract

    Aluminum (A356)-SiC metal matrix composites were fabricated by using liquid metallurgy route. To improve the interfacial bonding between the Al and SiC, an attempt has been made to coat the SiC particles with Ni and Cu. Electroless process was used for coating the reinforced particle. This surface modification due to electroless coating on SiC particles was confirmed with SEM/ EDS analysis. Processing parameters such as melt temperature, stirring speed, stirring time, and preheating temperature were optimized. SiC content in Al-SiC MMC were taken from 5 to 15% and effect of Ni and Cu coating was studied using hardness measurements. Influence of coated SiC particles in Al-SiC showed significant improvement in hardness values. Moreover, micro structural examination clearly demonstrated that Cu coating on SiC particles resulted in good metallurgical boding as compared to SiC particles with Ni coating. As a result, the hardness values of Al-SiC (Cu) exhibited better hardness values as compared to Al-SiC (Ni) MMCs. As expected, high SiC content in types of Al-SiC MMCs showed high hardness values as compared to low SiC content and base alloy. The present investigation suggests that Cu coating on SiC particles are more suitable as compared to Ni coating on SiC particles to synthesis Al-SiC MMCs.

    Item Type: Journal Article
    Additional Information: Copyright to this article belongs to M/s. Trans Tech Publications, Switzerland
    Uncontrolled Keywords: Metal matrix composites;Al-SiC;Surface modification;Nickel coating;A356-SiC Composites
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    CHEMISTRY AND MATERIALS > Composite Materials
    Division/Department: Other, Other, Other, Materials Science Division , Other
    Depositing User: Ms. Alphones Mary
    Date Deposited: 16 Jun 2014 15:24
    Last Modified: 16 Jun 2014 15:24
    URI: http://nal-ir.nal.res.in/id/eprint/11981

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