The Influence of Particles Size and Composition Variation of NiCr-CrC(20NiCr) Metal Matrix Composites Coatings Properties on Boiler Tubes Application

Abstract:

Deposition of NiCr-CrC(20NiCr) metal matrix composite (MMCs) coating have been applied on the substrate of boiler tubes material with High Velocity Oxygen Fuel (HVOF) thermal spray method and constant parameter. Variation of particle size and composition on MMCs was conducted to determined the optimum conditions for boiler applications. Microvickers hardness, metallography and thermal shock resistance testing were investigated. The best performance for boiler tubes application is MMC NiCr-CrC(20NiCr) with 270 mesh of NiCr particles size and 60:40 of composition as evidence by the highest of hardness value (410 Hv) and slightly of discoloration after thermal shock resistance with two variation cooling medium. While at MMC NiCr-CrC(20NiCr) with 70:30 variation composition, coating hardness value will decrease in line with the smaller of particle size of NiCr.

• Periodical: Materials Science Forum (Volume 889)
• Pages: 30-35
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.889.30
• Online since: March 2017
• Authors: Erie Martides*, Budi Prawara, Husaini Ardy, Endro Junianto, Budi Priyono
• Keywords: Boiler Tubes, Hardness, HVOF, Metal Matrix Composite Coating, Thermal Shock Resistance

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