Solid Particle Erosion Behaviour of Plasma-Sprayed (WC–Co)/(Cr3C2–NiCr) Coatings

This study reports the high-temperature erosion behaviour of plasma-sprayed 35% (WC–Co)/65% (Cr 3 C 2 –NiCr) coating on MDN-420 alloy. Plasma spray coatings have always played a pivotal role in enabling industries to combat problems of premature degradation of components that operate in harsh enviro...

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Bibliographic Details
Published in:Journal of bio- and tribo-corrosion 2022-06, Vol.8 (2), Article 40
Main Authors: Reddy, G. Madhu Sudana, Ramesh, S., Anne, Gajanan, Ramesh, M. R., Rao, T. Nageswara, Patil, Pradeep
Format: Article
Language:English
Subjects:
Adhesive strength
Air jets
Aluminum oxide
Biomaterials
Cemented carbides
Chemistry and Materials Science
Coatings
Cobalt
Corrosion
Corrosion and Coatings
Erosion resistance
Harsh environments
High temperature
Impact angle
Materials Science
Microhardness
Optical microscopes
Plasma spraying
Porosity
Profilometers
Scanning electron microscopy
Solid Mechanics
Substrates
Surface roughness
Tribology
Tungsten carbide
X-ray diffraction
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Summary:This study reports the high-temperature erosion behaviour of plasma-sprayed 35% (WC–Co)/65% (Cr 3 C 2 –NiCr) coating on MDN-420 alloy. Plasma spray coatings have always played a pivotal role in enabling industries to combat problems of premature degradation of components that operate in harsh environments. (WC–Co) + (Cr 3 C 2 –NiCr) coating is investigated for erosion under various laboratory-simulated conditions. Coating surface is characterized by using an optical microscope, scanning electron microscope (SEM), and X-ray diffraction (XRD). Porosity, microhardness, surface roughness, and adhesion strength of the coating are measured. The solid particle erosion test is conducted at the temperatures of 300 °C, 500 °C and 700 °C with the impact angles of 30° and 90° by using Al 2 O 3 as an erodent in the hot air jet erosion testing machine. The optical profilometer is used to evaluate the erosion volume loss of the coated and uncoated samples. It is observed that erosion resistance of the substrate is found to be higher than the coating at the different test temperatures. As the temperature increases, the erosion resistance of the coating is also increased at all the temperatures for both impact angles of 30° and 90°.The eroded coating surface morphology reveals that the generalized behaviour of the coating is ductile in nature.
ISSN:2198-4220
2198-4239
DOI:10.1007/s40735-022-00629-5