Example of an abrasive tribological test:
Self-fluxing WC-NiCrSiB flame sprayed coating is usually applied for abrasion and erosion wear resistance materials. The high wear resistance of this type of coating is caused by the combination of both mechanical properties of the hardness of tungsten carbide particles and the toughness of the metallic matrix NiCrSiB. Therefore, to reveal the effect of WC particles shape on the tribological behavior of such coatings, different kinds of powders with various WC shapes were HVOF sprayed (Fig 2). The standard abrasive Rubber/Wheel tests were carried out. To understand the wear mechanism, few of SEM
observations have been performed on the worn surface (Fig 3).