Microstructure and tribological properties of TiTaHfNbZr high entropy alloy coatings deposited on Ti 6Al 4V substrates

We report on the microstructure and tribological behavior of equimolar TiTaHfNbZr high entropy alloy (HEA) thin films deposited on the biomedical Ti-6Al-4V substrates by RF magnetron sputtering. Results of nanoindentation and sliding wear experiments were evaluated along with the microstructure and...

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Bibliographic Details
Published in:Intermetallics Vol. 105; pp. 99 - 106
Main Authors: Tüten, N., Canadinc, D., Motallebzadeh, A., Bal, B.
Format: Journal Article
Language:English
Published: Barking Elsevier BV 01.02.2019
Subjects:
Atomic force microscopy
Biocompatibility
Frictional wear
High entropy alloys
Knee
Magnetron sputtering
Microscopy
Microstructure
Nanoindentation
Orthopaedic implants
Protective coatings
Scanning electron microscopy
Sliding friction
Substrates
Surgical implants
Thin films
Titanium base alloys
Tribology
ISSN:0966-9795, 1879-0216
Online Access:Get full text
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Summary:We report on the microstructure and tribological behavior of equimolar TiTaHfNbZr high entropy alloy (HEA) thin films deposited on the biomedical Ti-6Al-4V substrates by RF magnetron sputtering. Results of nanoindentation and sliding wear experiments were evaluated along with the microstructure and topographical information obtained from scanning electron microscopy and atomic force microscopy. The findings clearly demonstrate that the TiTaHfNbZr HEA not only forms a homogenous and dense coating mechanically compatible with the Ti-6Al-4V substrates, but also provides a significantly enhanced surface protection against wear and cracking, which could prove valuable especially in long-term orthopedic implants that bear dynamic contact loading, such as in the cases of hip or knee joints.
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ISSN:0966-9795
1879-0216
DOI:10.1016/j.intermet.2018.11.015