Bioactive and Tribological Behaviour of Atmospheric Plasma Sprayed Hydroxyapatite Coatings Reinforced by Lanthanum Oxide

Yugeswaran Subramanian; Ananthapadmanabhan P.V; Paraskevopoulos  Konstantinos M.; Akira Kobayashi

doi:10.34256/famr1912

Yugeswaran Subramanian Department of Physics, Pondicherry University, Pondicherry – 605014, India
Ananthapadmanabhan P.V Director Research, Sri Shakthi Institute of Engineering and Technology, Coimbatore - 641062, Tamil Nadu, India
Paraskevopoulos Konstantinos M. Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Akira Kobayashi JWRI, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.

DOI: https://doi.org/10.34256/famr1912

Keywords: Hydroxyapatite, Lanthanum oxide, Plasma spraying, Coating, Bioactivity, SBF, Wear resistance

Abstract

Lanthanum oxide (La₂O₃) reinforced Hydroxyapatite coating was deposited by using unique gas tunnel type plasma spray torch under optimum spraying conditions. The phase and microstructure of the as-prepared powder and coatings were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). In vitro bioactivity of the plasma sprayed lanthanum oxide reinforced hydroxyapatite coatings were investigated by using simulated body fluid solution. Results showed that there was onset of apatite formation on the surface of coatings after 15 days of immersion in SBF, while after 19 days of immersion in SBF it was indicated that a HCAp phase crystallized on their surface. Our studies demonstrate that lanthanum oxide reinforced hydroxyapatite coatings are potentially useful biomaterials with good tribological and bioactive behaviour.

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