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Mechanical properties of vacuum plasma sprayed reinforced hydroxyapatite coatings on Ti-6Al-4V alloy

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Abstract

The aim of this present work was to deposit reinforced hydroxyapatite coatings with a bond coat of zirconia on Ti-6Al-4V substrate using the vacuum plasma spray technique in order to improve the surface properties. To achieve that, HA + 10 wt% Al2O3 and HA + 10 wt% ZrO2 coatings with an intermediate layer of zirconia were deposited on Ti-6Al-4V implant substrate. Further, these coatings were subjected to post-coating heat treatment at 700 °C for 1 h. The morphology and phase analysis of bio-ceramic powders, as-sprayed and heat-treated coatings, have been characterized using a scanning electron microscope and an X-ray diffractrometer. Crystallinity, surface roughness, porosity, hardness and shear strength were also investigated. The wear behaviour of the coatings was evaluated using a Taber abrasion tester as per ASTM F1978 standard. The results indicate that heat-treated coatings exhibit lower wear resistance than as-sprayed coatings and show lower porosity and higher crystallinity and hardness after heat treatment. Slight improvement in shear strength was observed after heat treatment.

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Acknowledgements

This work has been supported by IKG Punjab Technical University, Jalandhar, India. The authors would like to express their sincere gratitude to IKG Punjab Technical University, Jalandhar, India.

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Authors and Affiliations

  1. I. K. Gujral Punjab Technical University, Kapurthala, 144603, India

    Amardeep Singh & Vikas Chawla

  2. Guru Kashi University, Talwandi Sabo, 151301, India

    Gurbhinder Singh

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  1. Amardeep Singh
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Correspondence to Amardeep Singh.

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Singh, A., Singh, G. & Chawla, V. Mechanical properties of vacuum plasma sprayed reinforced hydroxyapatite coatings on Ti-6Al-4V alloy. J Aust Ceram Soc 53, 795–810 (2017). https://doi.org/10.1007/s41779-017-0093-z

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