Medžiagotyra (May 2016)

Effect of TiB2 Additives on Wear Behavior of NiCrBSi-Based Plasma-Sprayed Coatings

  • Oleksandr UMANSKYI,
  • Maryna STOROZHENKO,
  • Irina HUSSAINOVA,
  • Oleksandr TERENTJEV,
  • Andrey KOVALCHENKO,
  • Maksim ANTONOV

DOI
https://doi.org/10.5755/j01.ms.22.1.7307
Journal volume & issue
Vol. 22, no. 1
pp. 15 – 19

Abstract

Read online

The influence of titanium diboride additives on microstructure and wear-resistance of NiCrBSi thermally sprayed coatings deposited on a steel substrate has been studied. NiCrBSi-based composite powders with 10, 20, 40 wt.% TiB2 particles content were produced. The structure of NiCrSiB-TiB2 coatings consists of TiB2 and CrB grains distributed in Ni-based matrix. The wear-resistance of NiCrSiB-TiB2 plasma sprayed coatings in dry sliding conditions against the same coating using pin-on-disk tester. It was determined that the amount of titanium diboride particles in NiCrBSi-based coatings influences essentially on the wear resistance and wear mechanism. The NiCrBSi-based plasma sprayed coatings containing 20 wt. % of TiB2 possess the highest wear resistance due to the realization of mechano-oxidational wear mechanism.DOI: http://dx.doi.org/10.5755/j01.ms.22.1.7307

Keywords