Impact Wear of the Protective Cr3C2-Based HVOF-Sprayed Coatings

0525176 - ÚPT 2021 RIV CH eng J - Journal Article
Daniel, Josef - Grossman, Jan - Houdková, Š. - Bystrianský, M.
Impact Wear of the Protective Cr3C2-Based HVOF-Sprayed Coatings.
Materials. Roč. 13, č. 9 (2020), č. článku 2132. E-ISSN 1996-1944
Institutional support: RVO:68081731
Keywords : HVOF * hardmetal * chromium carbide * dynamic impact test * impact wear * thermal spraying
OECD category: Materials engineering
Impact factor: 3.623, year: 2020
Method of publishing: Open access
https://www.mdpi.com/1996-1944/13/9/2132

High velocity oxygen-fuel (HVOF) prepared CrC-based hardmetal coatings are generally known for their superior wear, corrosion, and oxidation resistance. These properties make this coating attractive for application in industry. However, under some loading conditions and in aggressive environments, the most commonly used NiCr matrix is not sufficient. The study is focused on the evaluation of dynamic impact wear of the HVOF-sprayed Cr3C2-25%NiCr and Cr3C2-50%NiCrMoNb coatings. Both coatings were tested by an impact tester with a wide range of impact loads. The Wohler-like dependence was determined for both coatings' materials. It was shown that, due to the different microstructure and higher amount of tough matrix, the impact lifetime of the Cr3C2-50%NiCrMoNb coating was higher than the lifetime of the Cr3C2-25%NiCr coating. Differences in the behavior of the coatings were the most pronounced at high impact loads.
Permanent Link: http://hdl.handle.net/11104/0309373