Journal Article10.4028/WWW.SCIENTIFIC.NET/AMR.815.540
Laser Cladding of Fluoridated Hydroxyapatite Coatings on Titanium Alloy for Bone Replacement Structures
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TL;DR: Bone-like fluoridated hydroxyapatite (FHA) coatings were prepared on Ti-6Al-4V substrates (TC4) by using laser cladding.
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Abstract: Bone-like fluoridated hydroxyapatite (FHA) coatings were prepared on Ti-6Al-4V substrates (TC4) by using laser cladding. This bioceramic coating was fabricated by adding CaF2 micron-particles into the hydroxyapatite before presetted on the Ti alloy substrate and radiated by laser beam which aimed at obtaining lower solubility, fine thermostability and maintaining the comparable bioactivity and biocompatibility. Coatings, which were processed using a Nd:YAG laser cladding, presented FHA crystallization on the surface with a uniform morphology along the coating cross-section and no significant dilution of the titanium alloy was observed. Phase analysis by X-ray diffraction indicated the generation of fluoridated hydroxyapatite phase in the laser cladded coatings. The coatings showed the formation of a metallurgically sound and diffused substrate-coating interface, which significantly increased bonding strength between the coatings and subtrate. The bioactive coatings afforded favourable bone bioactivity by inducing the rapid precipitation of apatite on their surface when immersed in a simulated body fluid (SBF). The work demonstrated the potential of using laser cladding for fabricating fluoridated hydroxyapatite bioceramic coatings on Ti alloy.
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Citations
Laser Cladding of Ti Alloys for Biomedical Applications
Monireh Ganjali,Mansoureh Ganjali,Sayed Khatiboleslam Sadrnezhaad,Yousef Pakzad +3 more
- 01 Jan 2021
TL;DR: In this paper, the authors carried out an exploratory study on laser surface modification of Ti alloys by laser cladding, which can provide high production efficiency, excellent control of the deposition process, and a mechanical interlock at the interface between the lining and the substrate.
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References
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TL;DR: In this article, a new simultaneous vapor deposition (SVD) technique was used to produce a bioceramic hydroxyapatite (HAp) thin film using two precursors, CaO and P 2 O 5, were evaporation source and resistive heater respectively.
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Cytotoxicity investigations of plasma sprayed calcium phosphate coatings
TL;DR: In this article, the authors report the production of HAp and FAp coatings with varying solubilities by plasma spraying and their in vitro cytotoxicity, showing that neither HAp nor FAp exhibited cytoxic influence on cells in culture.
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In situ fabrication of bioceramic composite coatings by laser cladding
TL;DR: In this paper, a bioceramic composite coating was fabricated onto AISI 316L stainless steel in situ by laser cladding with mixed powders of CaHPO 4 •2H 2 O and CaCO 3 without a bonding agent.
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Microstructure of yttric calcium phosphate bioceramic coatings synthesized by laser cladding
TL;DR: In this article, the yttric calcium phosphate (CaP) coatings were in situ prepared on pure titanium substrate by laser cladding, and the morphologies and phases constitution of CaP coatings are studied by electron probe microanalysis, X-ray diffraction and so on.
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Microstructure and osteoblast response of gradient bioceramic coating on titanium alloy fabricated by laser cladding
TL;DR: In this paper, the gradient calcium phosphate bioceramic coating on titanium alloy (Ti-6Al-4V) was designed and fabricated by laser cladding, which could help stress relaxation between coating and bone tissue.
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