The Concept of WC-CrC-Ni Plasma-Sprayed Coating with the Addition of YSZ Nanopowder for Cylinder Liner Applications

Abstract

In the article, the new concept of plasma-sprayed coatings for the cylinder liner was presented. The new type of powder containing WC-CrC-Ni with a 5 and 10 wt. % addition of nano-YSZ powder was plasma-sprayed on aluminum 2017 alloy samples. The selection of optimal plasma-spraying parameters was made taking into account the thickness, porosity, and hardness of the coatings. For the coatings obtained according to the developed parameters, the analysis of their microstructure, chemical, and phase composition was performed. At the next stage, the friction coefficient of the developed coatings was tested and compared with the properties of a classic cast-iron cylinder liner. The obtained results suggest that the developed type of coating might be used for cylinder liner applications after a deeper friction analysis.

The Influence of Plasma Spraying Parameters on Microstructure and Porosity of Bronze-Polyester Coatings for Plain Bearings Applications

“…The porosities created by the degradation of the polyester can be of particular importance for engines and transmissions operating at low temperatures. The lubricant contained in the porosity makes a role of oil pockets amd allows for the faster formation of an oil film on the surface of the sliding bearings [21]. On the other hand, the presence of aluminum oxide was found, which was formed as a result of the oxidation of powder components in the plasma plume.…”

The Effect of HVOF Spray Distance on Solid Particle Erosion Resistance of WC-based Cermets Bonded by Co, Co-Cr and Ni Deposited on Mg-alloy Substrate

“…Among many thermal spray methods, the high velocity oxy-fuel (HVOF) is characterized by homogenous structure with low porosity level, as well as low crack density [10][11][12]. It is caused by relatively low flame temperature and high particles velocity [13][14][15] in comparison to atmospheric plasma (APS) and suspension plasma spraying (SPS) [16,17].…”