![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
High-velocity oxy-fuel sprayed, iron alloy-based powder coatings, reinforced with tungsten carbide–cobalt (WC–Co) and titanium carbide–nickel molybdenum (TiC–NiMo) cermet particles, are compared under high-temperature abrasive–erosive wear conditions. Both WC–Co and TiC–NiMo particles underwent fracture, as well as dissolution, during the spraying process, but in the case of WC–Co particles this process was remarkably less intensive. Under the low impact angle conditions, the WC–Co particle-reinforced coating exhibited 1.1 times lower wear than the TiC–NiMo particle-reinforced coating because of the larger amount of the reinforcement remaining. Under the normal impact angle conditions, the WC–Co particle-reinforced coating showed 1.2 times lower wear than the TiC–NiMo particle-reinforced coating because of the resulting larger size of the WC–Co reinforcement and a more ductile matrix.
Acknowledgements
The authors thank Dr Ahto Vallikivi for his help with the high-temperature erosion wear tests and for fruitful discussions. This work was supported by the Estonian Ministry of Education and Research [target-financed project SF 01200091s08 ‘Hard coatings and surface engineering’ and institutional research funding IUT19-29 ‘Multi-scale structured ceramic based composites for extreme applications’] and by the European Union through the European Regional Development Fund [project TK114 ‘Mesosystems: Theory and Applications’ (3.2.0101.11-0029].