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PLASMA SPRAYING OF HIGH-NITROGEN-BEARING STEELS FOR WEAR-RESISTANT COATINGS AND STRUCTURAL APPLICATIONS
Journal article   Peer reviewed

PLASMA SPRAYING OF HIGH-NITROGEN-BEARING STEELS FOR WEAR-RESISTANT COATINGS AND STRUCTURAL APPLICATIONS

S Khatri, R Smith, P Jokiel, E Lugscheider and M Bohley
Journal of materials engineering and performance, v 3(4), pp 476-483
01 Aug 1994

Abstract

Materials Science Materials Science, Multidisciplinary Science & Technology Technology
Thermally sprayed coatings of high-nitrogen-bearing steel for corrosion resistance and wear applications were investigated. High-nitrogen steels represent a new class of engineering materials, Additions of nitrogen enhance the strength, corrosion resistance, and hardness of austenitic stainless steels without sacrificing low-temperature ductility and fracture toughness, In addition, the precipitation of nitrides at the grain boundaries is slower compared to that of ferrous carbides, thus increasing the elevated-temperature use of the steels, The objective was to take advantage of these properties and produce high-nitrogen steels via plasma spraying. An Fe-18Cr-18Mn steel with 0.61 wt% N was air and vacuum plasma sprayed over steel and aluminum substrates. Plasma spraying was conducted with Ar/H-2, Ar/He, and Ar/N-2 plasma gases in air, vacuum, and nitrogen atmospheres,It was found that the nitrogen atmosphere increased the nitrogen and nitride content of the coatings and improves wear and corrosion properties. The sprayed coatings were characterized for nitrogen and oxygen content, porosity, hardness, and wear resistance.

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Collaboration types
Industry collaboration
Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
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