The Structure and Characteristics of Wear-Resistant Coatings, Obtained by Supersonic Plasma Spraying

Abstract:

The characteristics of coatings designed to protect against cavitation and waterjet wear, obtained by supersonic atmospheric plasma spraying using air as a plasma-forming gas, are studied. The following powder materials were selected for coating: WC/10Co4Cr; Ni-Cr-B-Si-C; Ni-Al; Ni-Ti; bronze. Metallographic studies of the structures of specimens with applied coatings and measurements of their microhardness were carried out. Due to the fact that the tests of materials for hydroabrasive wear are not standardized, studies were carried out on the resistance of coatings to dry abrasive wear according to the ASTM G65-04 standard and to dry reciprocating friction according to the ASTM G133 standard. The conducted studies of the structures of the sprayed coatings suggest that the use of supersonic deposition modes guarantees the production of high-density coatings with a porosity of less than 1 %.

• Periodical: Key Engineering Materials (Volume 910)
• Pages: 1087-1095
• DOI: https://doi.org/10.4028/p-nlfkoz
• Online since: February 2022
• Authors: Victor Kuzmin*, Igor Gulyaev, Dmitriy Sergachev, Alexander Tambovcev, Boris Palagushkin, Stanislav Matveev, Oleg Shirobokov
• Keywords: APS, Microhardness, Porosity, Supersonic Plasma Spraying, WC/10Co4Cr, Wear Resistant Coating

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