Microstructure and performance of cold sprayed Al-SiC composite coatings with high fraction of particulates

Kumar, S.International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, India (författare)

Deposition of metal matrix composites (MMCs) through thermal spraying has traditionally presented problems associated with heterogeneity, porosity, and low wettability of particulates with matrix. Cold spray is a very rapid deposition process which is suitable for depositing a variety of ductile materials without any thermal degradation. Many researchers have attempted to deposit Al-SiC MMCs with 10–20% SiC using this technique. In the present study, three different powder compositions (FAl-23SiC, FAl-46SiC, FAl-71SiC) obtained by mixing Al and SiC powders were cold sprayed on aluminum substrates. The volume percentage and the average size of the SiC particulates in the cold sprayed coatings were estimated and found to be 23%, 47% and 52% for FAl-23SiC, FAl-46SiC and FAl-71SiC feedstocks, respectively. Effects of percentage and size of the SiC particulate retained in the composite coatings on the mechanical properties and the sliding wear performance were studied at different sliding conditions in the as-sprayed and heat treated conditions. The results were comprehensively analyzed and found to correlate well with the microstructure of the coatings.

TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
Cold spray
Metal matrix composites
Al-SiC
Wear
Production Technology
Produktionsteknik
Manufacturing and materials engineering
Produktions- och materialteknik

Reddy, S.K.International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, India (författare)
Joshi, Shrikant V.,1960-Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),PTW(Swepub:hv)shrjos (författare)
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, IndiaAvdelningen för avverkande och additativa tillverkningsprocesser (AAT) (creator_code:org_t)

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