Tribological Properties of FeNiCr Coatings with the Addition of La₂O₃ on 1045 Carbon Steel

Abstract:

FeNiCr alloy with various amount of La₂O₃ powders were thermal sprayed onto 1045 carbon steel substrate. Properties of sprayed coatings were studied by an Optimol SRV oscillating friction and wear tester in a ball-on-disc contact configuration. Electron probe microscopy analysis (EPMA), X-ray photoelectron spectroscopy (XPS), were employed to this study. The results show that La₂O₃ can refine the microstructure effectively, and make the element distribution uniform, which leads to the improvement on the properties of the coatings. Meanwhile, the wear rate of the FeNiCr alloy with 1.5% La₂O₃ is smaller than other coatings. Interestingly the rare earth can reduce the friction coefficient, and act as self-lubricant in the oxide debris layer formed on the worn surface in friction. Wear mechanism of the coatings is oxidation wear and a large amount of counterpart material is transferred to the coatings.

• Periodical: Advanced Materials Research (Volume 852)
• Pages: 219-222
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.852.219
• Online since: January 2014
• Authors: Zhen Yu Zhang, Bu Nv Liang
• Keywords: Coating, FeNiCr, La₂O₃, Tribological Property

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