Stomotology School of North China University of Science and Technology, Tangshan 063000, China.
Stomotology School of North China University of Science and Technology, Tangshan 063000, China.
Mater Sci Eng C Mater Biol Appl. 2020 Jan;106:110156. doi: 10.1016/j.msec.2019.110156. Epub 2019 Sep 3.
The silver contained coatings on cast Cobalt Chrome (CoCr) alloys were prepared by vacuum plasma spraying technique. The Scanning Electron Microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray Diffraction (XRD), energy dispersive spectrometry (EDS), properties of corrosion resistance, wear resistance and effect of vitro antibacterial on the surface of silver contained coating were investigated. The cytotoxicity of the coatings was performed with L-929 fibroblasts by MTT assay. SEM showed that the surfaces of the coatings were dense, smooth, no obvious cracks except only a few pores. XRD analysis indicated that the contents of the surface were mainly Ag and Cr except a small amount of AgO, CrO. EDS analysis indicated that the distributions of Cr and Ag were uniform without any large-scale clustering. The wear resistance of silver coatings is similar to that of CoCr alloys, and the corrosion resistance is slightly better than that of CoCr alloys. The Ag coating had no significant effect on the proliferation of L929 cells. The antibacterial results indicated that the number of S. mutans and C. albicans were significantly reduced on the surface of silver contained coating than that of CoCr alloys. All the results indicated that the silver contained coatings can be achieved by vacuum plasma spraying technique with good surface characteristic and antibacterial properties and have promising applications in biomedical area.
采用真空等离子喷涂技术在铸造钴铬（CoCr）合金上制备了含银涂层。采用扫描电子显微镜（SEM）、X 射线光电子能谱（XPS）、X 射线衍射（XRD）、能谱分析（EDS）等方法研究了含银涂层的耐腐蚀、耐磨损性能及体外抗菌性能。采用 MTT 法检测了涂层的细胞毒性。SEM 结果表明，涂层表面致密、光滑，除少量微孔外，无明显裂纹。XRD 分析表明，涂层表面的主要成分为 Ag 和 Cr，仅含有少量的 AgO 和 CrO。EDS 分析表明，Cr 和 Ag 的分布均匀，没有明显的大规模聚集。银涂层的耐磨性与 CoCr 合金相当，耐腐蚀性略优于 CoCr 合金。银涂层对 L929 细胞的增殖没有显著影响。抗菌结果表明，含银涂层表面的变形链球菌和白色念珠菌数量明显少于 CoCr 合金。所有结果表明，采用真空等离子喷涂技术可获得具有良好表面特性和抗菌性能的含银涂层，有望在生物医学领域得到应用。
