Particulate Erosion Resistance of Thermally Sprayed Coatings at Elevated Temperature

This work investigates the particle erosion properties of wear protection layers at high temperatures. The materials tested include tungsten and carbide cermets, nickel alloys, and chromium steel applied by different thermal spraying methods. Among key findings: HVOF-sprayed Cr₃C₂-NiCr cermet coatings showed the least amount of wear after particle erosion testing. It was confirmed that erosion resistance depends on elastic-plastic conditions between the particles and coating surface, not layer hardness. The impact of solid particles does not cause abrasion in elastic friction areas and only rarely causes abrasion in regions where plastic plowing occurs. Paper includes a German-language abstract.