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

  • Oleksandr UMANSKYI Frantzevich Institute for Problems of Material Science
  • Maryna STOROZHENKO Kyiv National Aviation University
  • Irina HUSSAINOVA
  • Oleksandr TERENTJEV
  • Andrey KOVALCHENKO
  • Maksim ANTONOV
Keywords: self-fluxing alloy, titanium diboride, plasma-sprayed coating, wear resistance

Abstract

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 sprayedcoatings 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

Author Biographies

Oleksandr UMANSKYI, Frantzevich Institute for Problems of Material Science
Professor, Chief of  Material Science and Surface Engineering Department
Maryna STOROZHENKO, Kyiv National Aviation University
PhD, associate professor of Airport Technologies Department,
Airspace Institute of National Aviation University
Published
2016-01-20
Section
METALS, ALLOYS, COATINGS