%0 Journal Article %T Investigating the Abrasive Wear Resistance of Thermal-Sprayed WC-Based Coatings %J Advanced Ceramics Progress %I Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) %Z 2423-7477 %A Nahvi, S. M. %D 2020 %\ 06/01/2020 %V 6 %N 2 %P 7-16 %! Investigating the Abrasive Wear Resistance of Thermal-Sprayed WC-Based Coatings %K abrasive wear %K WC–FeCrAl %K WC–NiMoCrFeCo %K HVOF %R 10.30501/acp.2020.107360 %X The purpose of this research was to investigate the abrasive wear behavior of WC–NiMoCrFeCo (WC-N) and WC–FeCrAl (WC-F) coatings deposited by high-velocity oxygen fuel (HVOF) spraying. The abrasive wear resistance was evaluated by a dry sand rubber wheel (DSRW) test rig using abrasives silica 70 and alumina 60, and the values were then compared to those of conventional WC-Co (WC-C) coatings. The abrasive wear with silica 70 indicated the “soft abrasion” regime, while alumina 60 abrasive caused a “hard abrasion” for all coatings. Moreover, the wear rate of the coatings abraded by alumina 60 was around 1.2-7.8 times greater than that of silica 70. WC-F exhibited the greatest wear resistance compared to other coatings tested by silica 70 due to its lower mean free path and higher hardness compared to other coatings. WC-C coating revealed the cobalt matrix removal followed by WC fracture and pullout using abrasive silica 70, while WC-F and WC-N coatings represented a combination of subsurface cracking, WC pullout, and fracture. Abraded by alumina 60, WC-C, WC-F, and WC-N coatings showed the evidence of grooving, pitting, and cutting. Moreover, WC-C coating had the highest wear resistance due to its high fracture toughness and low porosity, protecting WC-C coating against severe cracking and grooving, respectively. Cross-sectional images of the wear scars revealed a significant sub-surface cracking for WC-F and WC-N coatings while no significant cracking could be detected for WC-C coating. %U https://www.acerp.ir/article_107360_c3a039255ba751d3cae2a741244cada5.pdf