Journal
TRIBOLOGY INTERNATIONAL
Volume 155, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2020.106758
Keywords
Wear-resistant coating; Metal matrix composite; Interfacial adhesion; Hardness
Categories
Funding
- HBIS industrial grant
- Australian Research Council (ARC) through its DECRA Fellowship program [DE190101152]
- CSC-UQ PhD Scholarship
- University of Queensland (UQ)
- Australian Research Council [DE190101152] Funding Source: Australian Research Council
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In this study, a wear-resistant TiOxNy/alpha-Ti composite coating was successfully deposited onto Ti-6Al-4V, exhibiting high hardness and wear resistance due to the formation of reinforcing phases and excellent interfacial bonding.
In this work, a wear-resistant TiOxNy/alpha-Ti composite coating was deposited by laser cladding TiO2 powder onto Ti-6Al-4V in air. Dendritic TiOxNy reinforcements were synthesized in situ via reactions between Ti, TiO2 and N-2. The partially-melted substrate mixed with the ceramic melt and formed alpha-Ti matrix that bonded chemically with the reinforcements. Stacking faults, induced by thermal stress, were found in the TiOxNy grains, which exerted a strain hardening effect. The coating had an average microhardness of 1417 HV0.3, four times that of Ti-6Al-4V. The wear resistance of the composite coating was 3.7 times that of Ti-6Al-4V, which was attributed to its high hardness and the strong TiOxNy/alpha-Ti and coating/substrate interfaces.
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