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:10.5755/j01.ms.22.1.7307

Authors

Oleksandr UMANSKYI Frantzevich Institute for Problems of Material Science
Maryna STOROZHENKO Kyiv National Aviation University
Irina HUSSAINOVA
Oleksandr TERENTJEV
Andrey KOVALCHENKO
Maksim ANTONOV

DOI:

https://doi.org/10.5755/j01.ms.22.1.7307

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-TiB₂coatings consists of TiB₂ and CrB grains distributed in Ni-based matrix. The wear-resistance of NiCrSiB-TiB₂plasma 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