Microstructure and in vitro bioactivity of laser-cladded bioceramic coating on titanium alloy in a simulated body fluid |
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Authors: | Min Zheng Ding Fan Xiu-kun Li Jian-bin Zhang Qi-bin Liu |
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Affiliation: | 1. Instituto de Tecnología de Materiales, ITM, Universitat Politècnica de València, Camino de Vera s/n, 46022, Spain;2. IK4-LORTEK, Arranomendia kalea, 4A, 20240 Ordizia, Gipuzkoa, Spain |
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Abstract: | In order to obtain bioactivity on the surface of titanium alloy, the bioceramic coating on Ti–6Al–4V was designed and fabricated by laser cladding. The microstructure and bioactivity of laser-cladded bioceramic coating were investigated in vitro via soaking in a simulated body fluid (SBF). The results indicated that the laser-cladded bioceramic coating was metallurgically bonded to the substrate and contained such bioactive phases as hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP). A bone-like apatite layer was spontaneously formed on the surface of laser-cladded coating merely soaked in SBF for 7 days. And the appearance of flake-like and cotton-like morphology, which is the characteristic morphology of apatite, offered an advantageous condition for osseo-connection. The formation ability of apatite was remarkably accelerated on the surface of laser-cladded bioceramic coating compared with the untreated titanium alloy substrate. |
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