Characterization of amorphous Co–P alloy coatings electrodeposited with pulse current using gluconate bath
| Autor: | Parthasarathi Bera, H. Seenivasan, V.K. William Grips, K.S. Rajam |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Alloy Metallurgy General Physics and Astronomy Surfaces and Interfaces General Chemistry engineering.material Condensed Matter Physics Indentation hardness Nanocrystalline material Surfaces Coatings and Films Amorphous solid law.invention Metal Chemical engineering X-ray photoelectron spectroscopy Sputtering law visual_art engineering visual_art.visual_art_medium Crystallization |
| Zdroj: | Applied Surface Science. 258:9544-9553 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2012.05.115 |
| Popis: | 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 Pδ− form. Increase in the amounts of Co metal and Pδ− 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. |
| Databáze: | OpenAIRE |
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