XPS Characterization and Microhardness of Heat treated Co-W Coatings Electrodeposited with Gluconate Bath

Seenivasan, H and Bera, Parthasarathi and Balaraju, JN and Rajam, KS (2013) XPS Characterization and Microhardness of Heat treated Co-W Coatings Electrodeposited with Gluconate Bath. Advanced Science Focus, 1 (3). pp. 262-268.

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Abstract

Thermal stability and effect of heat treatment on electronic structure and microhardness of electrodeposited CoW alloy coatings using gluconate bath was characterized by DSC and XPS. XPS studies demonstrate that as-deposited alloy coating has significant amount of Co and W metals as well as Co2+ and W6+ species. There is a decrease in Co metal concentration in the alloy heated at 600 C and Co is in fully oxidized form when it is heat treated at 800 C. Marginal decrease in W metal concentration and presence of both W6+ and W5+ species are observed when the coating is heated at 600 C, whereas mostly W6+ species along with a little amount of W5+ could be seen in the coating heated at 800 C. Microhardness values of 1017 and 1336 HK are observed when Co−W coatings are heated at 500 and 600 C, respectively and they are comparable with as-deposited hard chr

Item Type: Article
Additional Information: Copyright for this published article belongs to American Scientific Publishers
Uncontrolled Keywords: Co-W coating;Heat treatment;DSC;XPS;Microhardness
Subjects: AERONAUTICS > Aeronautics (General)
Depositing User: Ms. Alphones Mary
Date Deposited: 09 May 2014 08:37
Last Modified: 28 Oct 2015 07:20
URI: http://nal-ir.nal.res.in/id/eprint/11960

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