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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Hariharan, Seenivasan
University of Amsterdam
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2018Pt-Ni Subsurface Alloy Catalystscitations
- 2014Characterization and corrosion behavior of Co and Co-P coatings electrodeposited from chloride bathcitations
- 2013Studies on surface structure, morphology and composition of Co-W coatings electrodeposited with direct and pulse current using gluconate bathcitations
- 2013Characterization and microhardness of Co-W coatings electrodeposited at different pH using gluconate bathcitations
- 2013Characterization and hardness of Co-P coatings obtained from direct current electrodeposition using gluconate bathcitations
- 2012Characterization of amorphous Co-P alloy coatings electrodeposited with pulse current using gluconate bathcitations
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article
Characterization and microhardness of Co-W coatings electrodeposited at different pH using gluconate bath
Abstract
<p>Electrodeposition of Co-W alloy coatings has been carried out with DC and PC using gluconate bath at different pH. These coatings are characterized for their structure, morphology and chemical composition by X-ray diffraction, field emission scanning electron microscopy, differential scanning calorimetry and X-ray photoelectron spectroscopy (XPS). Alloy coatings plated at pH8 are crystalline, whereas coatings electrodeposited at pH5 are nanocrystalline in nature. XPS studies have demonstrated that as-deposited alloy plated at pH8 with DC contain only Co<sup>2+</sup> and W<sup>6+</sup> species, whereas that alloy plated at pH5 has significant amount of Co<sup>0</sup> and W<sup>0</sup> along with Co<sup>2+</sup> and W<sup>6+</sup> species. Again, Co<sup>2+</sup> and W<sup>6+</sup> are main species in all as-deposited PC plated alloys in both pH. Co<sup>0</sup> concentration increases upon successive sputtering of all alloy coatings. In contrast, mainly W<sup>6+</sup> species is detected in the following layers of all alloys plated with PC. Alloys plated at pH5 show higher microhardness compared to their pH8 counterparts.</p>