Ghaith El-Sayed, Hodgson Simon, Sharp Martin
School of Science and Technology, Teesside University, Middleborough, TS1 3BA, UK,
J Mater Sci Mater Med. 2015 Feb;26(2):83. doi: 10.1007/s10856-015-5399-1. Epub 2015 Jan 31.
Laser surface alloying is a powerful technique for improving the mechanical and chemical properties of engineering components. In this study, laser surface irradiation process employed in the surface modification off 316L stainless steel substrate using hydroxyapatite-titanium oxide to provide a composite ceramic layer for the suitability of applying this technology to improve the biocompatibility of medical alloys and implants. Fusion of the metal surface incorporating hydroxyapatite-titania ceramic particles using a 30 W Nd:YAG laser at different laser powers, 40, 50 and 70% power and a scan speed of 40 mm s(-1) was observed to adopt the optimum condition of ceramic deposition. Coatings were evaluated in terms of microstructure, surface morphology, composition biocompatibility using XRD, ATR-FTIR, SEM and EDS. Evaluation of the in vitro bioactivity by soaking the treated metal in SBF for 10 days showed the deposition of biomimetic apatite.
激光表面合金化是一种用于改善工程部件机械和化学性能的强大技术。在本研究中，采用激光表面辐照工艺对316L不锈钢基体进行表面改性，使用羟基磷灰石 - 二氧化钛以提供复合陶瓷层，旨在将该技术应用于改善医用合金和植入物的生物相容性。观察到使用30W Nd:YAG激光在不同激光功率（40%、50%和70%功率）以及40mm s(-1)的扫描速度下，使金属表面与羟基磷灰石 - 二氧化钛陶瓷颗粒融合，从而采用了陶瓷沉积的最佳条件。使用XRD、ATR - FTIR、SEM和EDS对涂层的微观结构、表面形态、成分生物相容性进行了评估。将处理后的金属在模拟体液（SBF）中浸泡10天以评估体外生物活性，结果表明有仿生磷灰石沉积。
