Effect of plasma gas atmosphere on hydroxyapatite-coated titanium-based implants

Kotian, Ravindra and *, Karen Boaz and Madhyastha, Prashanthi S. and Bangera, Madhu Keshava (2021) Effect of plasma gas atmosphere on hydroxyapatite-coated titanium-based implants. Metallurgical Research and Technology, 118 (1). pp. 1-7. ISSN 22713646

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The study was designed to understand the influence of different atmospheres of plasma gas on hydroxyapatite-coated commercially pure Titanium (Ti) and titanium alloy (Ti-6Al-4V). Ti and Ti-6Al-4V were plasma spray-coated with hydroxyapatite in argon, nitrogen, argon/hydrogen, and nitrogen/hydrogen atmospheres. The microstructure, porosity, calcium to phosphate (Ca-P) ratio, surface roughness, and hardness of the coat were characterized using a scanning electron microscope, energy dispersive spectroscopy, image analyzer, profilometer, and Vickers hardness tester. The analyses of the coatings obtained in different plasma gas atmospheres showed variation in microstructure, morphology, porosity, surface roughness, and hardness. As the enthalpy decreased, an increase in porosity was observed in nitrogen/hydrogen, nitrogen, argon/hydrogen, and argon atmospheres, respectively. Peak Ca-P ratio was observed in argon, which is the most inert atmosphere compared to other tested plasma atmospheres. Atmospheres with high enthalpy presented an even surface with comparatively low surface roughness. Hardness value decreased with increasing porosity. The plasma gas atmosphere has a significant influence on Ca-P ratio, porosity, and microcracks of hydroxyapatite-coated oral implants.

Item Type: Article
Uncontrolled Keywords: EDS / implant coating / plasma spraying / SEM / surface characterization
Subjects: Dentistry > MCODS Mangalore > Dental Materials
Dentistry > MCODS Mangalore > Oral Pathology
Depositing User: KMCMLR User
Date Deposited: 17 Dec 2021 11:06
Last Modified: 17 Dec 2021 11:06
URI: http://eprints.manipal.edu/id/eprint/157720

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