کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1659609 | 1517687 | 2009 | 6 صفحه PDF | دانلود رایگان |
Hydroxyapatite (HAp) coating on titanium (Ti) or Ti alloy implant materials is one of the important technologies for improving the bioactivity of their surface. We recently developed a new HAp coating method using two laser beams, laser-assisted laser ablation method (LALA method). In this method, two excimer lasers were used. One laser beam from KrF laser, the ablation laser, is used for ablation of a HAp target. The other beam from ArF laser, the assist laser, is used to irradiate a Ti substrate surface during formation of the HAp coating. The assist laser plays an important role in the formation of a crystalline HAp coating and improves the strength of adhesion to the Ti substrate.The coating quality varied with the timing of the assist laser irradiation. A coating deposited with a long assist laser delay contained a large amorphous component. High-quality coatings were obtained with delay time between 2 and 10 μs.Using the present method, we succeeded in fabricating thin (≤1 μm) HAp coatings with high crystallinity and high adhesion strength.
Journal: Surface and Coatings Technology - Volume 204, Issues 1–2, 25 September 2009, Pages 135–140