Abrasive wear behaviour of detonation-sprayed (Ti, Cr)C-Ni hardmetal coatings

DOI: 10.62564/M4-MS1535

Maryna Storozhenko¹, Oleksandr Umanskyi¹, Manel Rodriguez Ripoll², Illia Morshch³, Kostiantyn Haltsov¹, Oleksii Bondarenko¹, Valerii Brazhevskyi⁴, Oleksandr Chernyshov<sup>4

1</sup>Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine
²Excellence Centre of Tribology (AC2T research GmbH), Austria
³National Aviation University, Ukraine
⁴Composite Systems Ltd, Ukraine


The (Ti,Cr)C-Ni coatings with different binder phase content (17, 25, 33 wt.%) were deposited onto the steel substrate by detonation spraying. The coatings have typical lamellar microstructure with well-bonded splats, which consist of fine (Ti,Cr)C particles and a Ni-based matrix. The coatings' high-temperature (HT) hardness was measured in the 20 - 900 °C temperature range using a hardness tester designed by the Austrian Excellence Centre for Tribology [1]. The hardness of (Ti, Cr)C-based coatings with various Ni content gradually decreased from RT to 500 C, and then a sharper decrease in hardness was observed until a final value of 78-104 HV at 900 °C was reached. The wear resistance of the coatings was evaluated in high-stress abrasion regimes at RT, 600, 800 °C by using an ASTM G65 abrasion tester modified to allow heating of both specimens and abrasive material. Wear rates of the coatings increased with rising temperature to 600 °C and then decreased at 800 °C. The (Ti, Cr)C-33%Ni coating exhibited better abrasive wear resistance compared to the (Ti, Cr)C-17%Ni and (Ti, Cr)C-25%Ni coatings. Abrasive wear of the coatings proceeds through abrasive grooving and the pull-out of splat fragments.

Keywords
coatings, cermet, wear-resistance, wear mechanism

Acknowledgments
Part of this work was funded by the National Academy of Science of Ukraine (Project III-8- 22) and “Austrian COMET-Programme” (Project K2 InTribology2, no. 906860)

References
[1] Leo Janka, Jonas Norpoth, Richard Trache, Lutz-Michael Berger, Influence of heat treatment on the abrasive wear resistance of a Cr3C2NiCr coating deposited by an ethene-fuelled HVOF spray process, Surface and Coatings Technology, 2016, Volume 291, Pages 444-451