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Deposition of hydroxyapatite coatings by axial plasma spraying: Influence of feedstock characteristics on coating microstructure, phase content and mechanical properties
University of Turku, (FIN).ORCID iD: 0000-0003-1897-0171
Indian Institute of Technology, Kanpur (IND).
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-9578-4076
Indian Institute of Technology, Kanpur (IND).
2021 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 41, no 8, p. 4637-4649Article in journal (Refereed) Published
Abstract [en]

Axial plasma spray is one of the thermal spray techniques to deposit multifunctional advanced coatings. The present work explores the use of this process to deposit thin, continuous, and adherent Ca5 (PO4)3OH (hydroxyapatite, HAp) coatings and characterize its microstructure, phases, hardness and adhesion strength. Three different suspension-deposited HAp coatings were investigated and compared with powder-deposited HAp coating on a Ti6Al4V substrate. The effect of mean solute particle size and solid-loading in the suspension has been explored on the evolution of microstructure, phase content and mechanical properties of axial suspension plasma sprayed (ASPS) coatings. Phase-characterization has shown retention of hydroxyapatite phase and coating crystallinity in the deposited coatings, whereas the adhesion strength of the HAp coating decreased from -40 MPa to -13 MPa when bioglass was added to the feedstock material. The lower solid load content and lower mean solute particle size in the suspension were found to be beneficial in achieving porous, rougher, and welladhering coatings. This work concludes that ASPS can potentially deposit thin HAp coatings (< 50 ?m) with high adhesion strength.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 41, no 8, p. 4637-4649
Keywords [en]
Axial plasma spraying; Suspensions; Phase degradation; Hydroxyapatite coatings; Microstructure; Adhesion strength
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-17227DOI: 10.1016/j.jeurceramsoc.2021.02.050ISI: 000637514600001Scopus ID: 2-s2.0-85103052625OAI: oai:DiVA.org:hv-17227DiVA, id: diva2:1620718
Note

Finacing: Swarnajayanti fellowship, DST, Govt. of India (DST/SJF/ETA-02-2016-17)

Available from: 2021-12-16 Created: 2021-12-16 Last updated: 2021-12-16

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Ganvir, AshishMarkocsan, Nicolaie

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