發(fā)布時(shí)間：2019-03-20 09:40

【摘要】：為提高奧氏體不銹鋼的表面硬度和耐磨性并賦予其良好的抗菌性能,應(yīng)用改進(jìn)的活性屏離子滲氮技術(shù)(ASPN)對(duì)AISI 316不銹鋼進(jìn)行了銀氮(Ag-N)共滲處理。用SEM、EDS、XRD、TEM、輝光放電光譜儀(GDOES)表征復(fù)合共滲層的成分和組織結(jié)構(gòu)。對(duì)不銹鋼基體(SS)和復(fù)合共滲層的顯微硬度、空氣和腐蝕介質(zhì)中的磨損性能、抗腐蝕性能以及對(duì)金黃色葡萄球菌(S.aureus)的抗菌性能進(jìn)行了分析。結(jié)果表明,Ag-N復(fù)合共滲處理后形成的復(fù)合共滲層連續(xù)致密,主要由Ag摻雜S相納米結(jié)構(gòu)沉積層和S相擴(kuò)散層構(gòu)成。復(fù)合共滲層表面硬度較基材提高了約3~4倍,干摩擦條件下的磨損量較基體最高降低了約84.6%。復(fù)合共滲處理后試樣在人工模擬體液(SBF)中的耐蝕性較基體不銹鋼略有降低,比磨損率較基體降低了約35%。抗菌試驗(yàn)表明,復(fù)合共滲層與金黃色葡萄球菌(S.aureus)接觸12 h后,達(dá)到了100%的殺菌率。
[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%.
【作者單位】： 太原理工大學(xué)表面工程研究所;英國(guó)伯明翰大學(xué)冶金與材料學(xué)院;
【基金】：歐盟第七框架瑪麗居里行動(dòng)計(jì)劃項(xiàng)目(PIIF-GA-2012-327750) 山西省回國(guó)留學(xué)人員科研資助項(xiàng)目(2016-025)~~
【分類號(hào)】：TG174.4

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