工业纯钛表面高能喷丸对仿生矿化合成羟基磷灰石涂层的影响

The effect of high-energy shot peening commercial pure titanium on hydroxyapatite coating by mineralization

将表面抛光和高能喷丸处理的工业纯钛在5mol/L NaOH溶液中处理后,在模拟体液(SBF)中矿化生成羟基磷灰石(HAP)涂层。用扫描电镜(SEM)、X射线衍射仪(XRD)、电子探针(EPMA)和红外光谱仪(FT-IR)分析了涂层表面形貌和成分,探讨了表面高能喷丸工艺对钛基体及涂层的影响。结果表明,通过仿生矿化法,生成了钙磷比为1.30的碳酸化的HAP涂层;与抛光钛相比,高能喷丸工艺增加了钛基体的表面化学反应活性,从而加快了钛基体上HAP沉积速度;增加了表面粗糙度,提高了涂层与基体的结合力。

Hydroxyapatite（HAP） coating was synthesized via biomimetic method,by immersing commercial pure titanium（CP Ti） in simulated body fluid（SBF） after alkali pre-treatment and heat treatment.The surface morphology and composition of the coating were analyzed by scanning electron microscope（SEM）,X-ray diffraction（XRD）,electron probe microanalyzer（EPMA） and infrared spectroscopy（FTIR）,and the effect of high-energy shot peening（HESP） to Ti substrate and hydroxyapatite coating was discussed.The results indicated that HAP coating was synthesized by biomimetic method and the ratio of Ca/P is 1.30.The techniques of HESP enhanced the chemical reactivity of the Ti substrate,and accelerated the deposition rate of HAP.Surface roughness increasement narrowed the coating cracks,and enhanced the cohesion between the substrate and coating.