Wear resistance of nanostructured Cr-based WC hardmetals sintered by spark plasma sintering Articles uri icon

publication date

  • January 2020

start page

  • 1

end page

  • 11


  • 105092


  • 86

International Standard Serial Number (ISSN)

  • 0263-4368

Electronic International Standard Serial Number (EISSN)

  • 2213-3917


  • Nanostructured Cr-based WC hardmetals are successfully sintered by spark plasma sintering. The wear behaviour of these Cr-based WC hardmetals with different C contents ranging from 5.57 wt% to 6.91 wt%, is evaluated performing sliding wear tests under two different wear conditions. This work analyses the influence of the C content on the wear performance through the study of the phase formation and WC grain size. The Cr-based hardmetal with 5.57 wt% C content exhibits a lower wear rate than Co-based WC hardmetals tested under similar dry ball-on-plate wear conditions, even considering that these Co-based WC hardmetals have higher WC content (90 wt%) than Cr-based WC hardmetals (83.2 wt%). The combination of a nanosized WC grain and the avoidance of brittle (Cr,Fe)7C3 or soft graphite phases leads to a superior wear performance. Thus, the use of Cr-based binders in the hardmetal industry, alternatively to Co-based binders, is promising in applications in which high wear resistance is needed.


  • cr-based wc hardmetals; dry sliding wear; nanocrystalline; spark plasma sintering; wear resistance