Cavitation erosion characteristics of nickel-based alloy-composite coatings obtained by plasma spraying |
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Authors: | B.S. Mann P.R. Krishnamoorthy P. Vivekananda |
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Affiliation: | Materials Science Laboratory, Corporate Research and Development Division, Bharat Heavy Electricals Limited, Vikasnagar, Hyderabad 500593 India;Civil Engineering Department, Engineering College, AnanthapurIndia |
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Abstract: | Nickel-based alloy and composite coatings were obtained on an 18-8 stainless steel substrate by a plasma spraying technique. They were sintered in a vacuum furnace (10?2 Pa) to improve toughness and to reduce hardness. The cavitation erosion resistance of these coatings was evaluated using a rotating disc apparatus. The results of the investigation reveal that sintered coatings are several times better than “as-sprayed” plasma coatings. The sintered coatings can help in increasing the length of the incubation period. |
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