Microstructure and osteoblast response of gradient bioceramic coating on titanium alloy fabricated by laser cladding |
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Authors: | Min Zheng Ding Fan Wen-Fei Li Jian-Bin Zhang |
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Affiliation: | a State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, PR China b College of Materials Science and Engineering, Guizhou University, Guiyang 550003, PR China |
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Abstract: | To construct a bioactive interface between metal implant and the surrounding bone tissue, the gradient calcium phosphate bioceramic coating on titanium alloy (Ti-6Al-4V) was designed and fabricated by laser cladding. The results demonstrated that the gradient bioceramic coating was metallurgically bonded to the titanium alloy substrate. The appearance of hydroxyapatite and β-tricalcium phosphate indicated that the bioactive phases were synthesized on the surface of coating. The microhardness gradually decreased from the coating to substrate, which could help stress relaxation between coating and bone tissue. Furthermore, the methyl thiazolyl tetrazolium (MTT) assay of cell proliferation revealed that the laser-cladded bioceramic coating had more favorable osteoblast response compared with the surface of untreated titanium alloy substrate. |
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Keywords: | 42.62.Be 87.68.+z |
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