AISI 316不锈钢表面银氮复合共渗及其磨损和抗菌性能
发布时间：2019-03-20 09:40
【摘要】：为提高奥氏体不锈钢的表面硬度和耐磨性并赋予其良好的抗菌性能,应用改进的活性屏离子渗氮技术(ASPN)对AISI 316不锈钢进行了银氮(Ag-N)共渗处理。用SEM、EDS、XRD、TEM、辉光放电光谱仪(GDOES)表征复合共渗层的成分和组织结构。对不锈钢基体(SS)和复合共渗层的显微硬度、空气和腐蚀介质中的磨损性能、抗腐蚀性能以及对金黄色葡萄球菌(S.aureus)的抗菌性能进行了分析。结果表明,Ag-N复合共渗处理后形成的复合共渗层连续致密,主要由Ag掺杂S相纳米结构沉积层和S相扩散层构成。复合共渗层表面硬度较基材提高了约3~4倍,干摩擦条件下的磨损量较基体最高降低了约84.6%。复合共渗处理后试样在人工模拟体液(SBF)中的耐蚀性较基体不锈钢略有降低,比磨损率较基体降低了约35%。抗菌试验表明,复合共渗层与金黄色葡萄球菌(S.aureus)接触12 h后,达到了100%的杀菌率。
[Abstract]:In order to improve the surface hardness and wear resistance of austenitic stainless steel and give it good antibacterial properties, the silver nitrogen (Ag-N) co-treatment of AISI 316 stainless steel was carried out by using the improved active screen ion nitriding technology (ASPN). The composition and microstructure of the composite layer were characterized by SEM,EDS,XRD,TEM, glow discharge spectrometer (GDOES). The microhardness, wear properties in air and corrosion medium, corrosion resistance and antibacterial properties of staphylococcus aureus (S.aureus) on stainless steel substrate (SS) and composite layer were analyzed. The results show that the composite layer formed by Ag-N composite infiltration is continuous and compact, which is mainly composed of Ag doped S-phase nano-structure deposition layer and S-phase diffusion layer. The surface hardness of the composite layer is about 3 times higher than that of the substrate, and the wear loss under dry friction is about 84.6% lower than that of the substrate. The corrosion resistance of the samples treated by composite infiltration in artificial simulated body fluid (SBF) is slightly lower than that of stainless steel, and the specific wear rate is about 35% lower than that of the substrate. The antibacterial test showed that after contact with Staphylococcus aureus (S.aureus) for 12 h, the bactericidal rate of the composite layer reached 100%.
【作者单位】： 太原理工大学表面工程研究所;英国伯明翰大学冶金与材料学院;
【基金】：欧盟第七框架玛丽居里行动计划项目(PIIF-GA-2012-327750) 山西省回国留学人员科研资助项目(2016-025)~~
【分类号】：TG174.4
本文编号：2444092
[Abstract]:In order to improve the surface hardness and wear resistance of austenitic stainless steel and give it good antibacterial properties, the silver nitrogen (Ag-N) co-treatment of AISI 316 stainless steel was carried out by using the improved active screen ion nitriding technology (ASPN). The composition and microstructure of the composite layer were characterized by SEM,EDS,XRD,TEM, glow discharge spectrometer (GDOES). The microhardness, wear properties in air and corrosion medium, corrosion resistance and antibacterial properties of staphylococcus aureus (S.aureus) on stainless steel substrate (SS) and composite layer were analyzed. The results show that the composite layer formed by Ag-N composite infiltration is continuous and compact, which is mainly composed of Ag doped S-phase nano-structure deposition layer and S-phase diffusion layer. The surface hardness of the composite layer is about 3 times higher than that of the substrate, and the wear loss under dry friction is about 84.6% lower than that of the substrate. The corrosion resistance of the samples treated by composite infiltration in artificial simulated body fluid (SBF) is slightly lower than that of stainless steel, and the specific wear rate is about 35% lower than that of the substrate. The antibacterial test showed that after contact with Staphylococcus aureus (S.aureus) for 12 h, the bactericidal rate of the composite layer reached 100%.
【作者单位】： 太原理工大学表面工程研究所;英国伯明翰大学冶金与材料学院;
【基金】：欧盟第七框架玛丽居里行动计划项目(PIIF-GA-2012-327750) 山西省回国留学人员科研资助项目(2016-025)~~
【分类号】：TG174.4
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