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Room temperature and 600 °C erosion behaviour of various chromium carbide composite coatings
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur, Hyderabad 500005, India; Department of Metallurgical Engineering & Materials Science, IIT Bombay, Powai, Mumbai 400076, India.
Defence Metallurgical Research Laboratory (DMRL), Kanchanbagh, Hyderabad 500058, India.
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur, Hyderabad 500005, India.
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Balapur, Hyderabad 500005, India.
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2019 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 422-423, p. 44-53Article in journal (Refereed) Published
Abstract [en]

In this study, the erosion behaviour of laser clad chromium carbide-Ni rich alloy composite coatings with a wide range of carbide contents at room temperature and 600 °C were investigated. The variation in carbide content of the coatings was due to dilution from the substrate and the high cooling rate in the laser cladding process preventing re-solidification of the molten carbides. Erosion rate was observed to be a function of carbide content alone and was significantly higher at 600 °C as compared to room temperature. Erosion wear ratio (E90/E30) was also dependent on carbide content but decreased at higher temperature and higher carbide contents. A comparison of erosion behaviour with detonation and plasma sprayed counterparts showed the superior performance of laser clad coatings at 600 °C. The poor erosion performance of the detonation and plasma sprayed coatings was due to weak splat bonding. Thick oxide layer formed on the steel substrate after pre-oxidation resulted in its poor erosion performance.

Place, publisher, year, edition, pages
2019. Vol. 422-423, p. 44-53
Keywords [en]
Laser processing, Thermal spray coatings, Solid particle erosion, Metal matrix composites, Hardness
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-13462DOI: 10.1016/j.wear.2019.01.025Scopus ID: 2-s2.0-85059935850OAI: oai:DiVA.org:hv-13462DiVA, id: diva2:1286797
Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2019-07-25Bibliographically approved

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Joshi, Shrikant V.

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