Characterization of amorphous Co–P alloy coatings electrodeposited with pulse current using gluconate bath

Parthasarathi, Bera and Seenivasan, H and Rajam, KS and William Grips, VK (2012) Characterization of amorphous Co–P alloy coatings electrodeposited with pulse current using gluconate bath. Applied Surface Science, 258 . pp. 9544-9553. ISSN 0042-207X

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    Abstract

    Co–P alloy coatings were electrodeposited with pulse current using gluconate bath and characterized by XRD, FESEM, AFM, DSC and XPS. Co–P alloy coatings are amorphous in nature as demonstrated by XRD. FESEM exhibits the “cauliflower type” morphology that is distinctive of nanocrystalline metals and alloys. Co–P alloys are found to follow instantaneous growth mechanism as revealed by AFM studies. Two exothermic peaks at 320 and 340 ◦C in DSC profiles of Co–P deposit correspond to the crystallization of the deposit. Detailed XPS studies of these alloy coatings have shown that as-deposited coatings consist of Co metal as well as oxidized Co species. P has mostly been present as bulk alloy on the surface as Pı− form. Increase in the amounts of Co metal and Pı− are observed upon intermittent sputtering. No appreciable increase in microhardness is observed with increase in the phosphorous content, but it increases with heat treatment significantly.

    Item Type: Journal Article
    Uncontrolled Keywords: Co–P alloy coatings Electrodeposition Pulse current Gluconate bath XPS
    Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
    Division/Department: Surface Engineering Division, Surface Engineering Division, Surface Engineering Division, Surface Engineering Division
    Depositing User: Ms Indrani V
    Date Deposited: 24 Sep 2012 13:41
    Last Modified: 24 Sep 2012 13:41
    URI: http://nal-ir.nal.res.in/id/eprint/10918

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