Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) and Shandong Engineering Research Center for Superhard Material, Department of Materials Science and Engineering, Shandong University, Jinan 250061, China.
Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Ministry of Education) and National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan 250061, China.
J Colloid Interface Sci. 2021 Jun 15;592:498-508. doi: 10.1016/j.jcis.2021.02.064. Epub 2021 Feb 23.
To improve the bioactivity of titanium alloy (Ti-6Al-4V), CaO-SiO coatings on titanium alloys were fabricated using laser cladding method. The effect of NaO and ZnO on the microstructure and properties of the prepared coatings was discussed. The microstructure of the CaO-SiO coatings consists of cellular grains and cellular dendrites. The mutual diffusion of elements occurs between the coating and substrate. The base CaO-SiO coating is composed of different phases including CaTiO, α-Ca(SiO), SiO, TiO and CaO. The formation of CaTiO in the ceramic layer was analyzed through thermodynamics. NaO has little influence on the microstructure, average hardness and wear resistance. When ZnO is added to the precursor, the microstructure turns to cell dendrite, and ZnO and ZnSiO appear in the corresponding coating. The addition of ZnO reduces the average hardness and wear resistance of the ceramic layer. The in vitro soaking in SBF shows that the laser cladding coating has the ability to form an apatite layer.
为了提高钛合金（Ti-6Al-4V）的生物活性，采用激光熔覆法在钛合金上制备了 CaO-SiO 涂层。讨论了 NaO 和 ZnO 对所制备涂层的微观结构和性能的影响。CaO-SiO 涂层的微观结构由胞状晶粒和胞状枝晶组成。涂层与基体之间发生元素的相互扩散。基底 CaO-SiO 涂层由不同的相组成，包括 CaTiO、α-Ca（SiO）、SiO、TiO 和 CaO。通过热力学分析了陶瓷层中 CaTiO 的形成。NaO 对微观结构、平均硬度和耐磨性影响不大。当在先驱体中添加 ZnO 时，微观结构变为胞状枝晶，相应的涂层中出现 ZnO 和 ZnSiO。ZnO 的添加降低了陶瓷层的平均硬度和耐磨性。在 SBF 中的体外浸泡表明，激光熔覆涂层具有形成磷灰石层的能力。
