Laser cladding of HA/Ti composite coating on NiTi alloy

被引:26
|
作者
Yang, S. [1 ]
Li, W. H. [1 ]
Man, H. C. [2 ]
机构
[1] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China
[2] Hong Kong Polytech Univ, Adv Mfg Technol Res Ctr, Dept Ind & Syst Engn, Kowloon, Hong Kong, Peoples R China
基金
高等学校博士学科点专项科研基金;
关键词
Hydroxyapatite; Bioactivity; Coating; Laser; NiTi; SPRAYED HYDROXYAPATITE COATINGS; CORROSION BEHAVIOR; MICROSTRUCTURE; SURFACE; CYTOTOXICITY;
D O I
10.1179/1743294413Y.0000000115
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
To accelerate the bone growth around a metallic implant and to achieve the mechanical characteristics needed for biomedical applications, a hydroxyapatite/pure titanium (HA/Ti) composite coating was produced on NiTi alloy substrate by laser cladding. The experimental results showed that an excellent metallurgical bonding between the coating and the substrate was obtained. Owing to decomposition of HA under irradiation of high power laser, the microstructures of coating were mainly composed of CaO, CaTiO3, titanium phosphide and HA phases. In vitro experimental result demonstrated that HA/Ti composite coating made the bioactivity of NiTi alloy improved remarkably while restraining Ni ion from releasing.
引用
收藏
页码:409 / 413
页数:5
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