含银和铌抗菌316L不锈钢的研究(英文)

Antibacterial 316L Stainless Steel Containing Silver and Niobium

采用银和铌对316L不锈钢进行改性,分别采用覆膜抗菌试验、电化学试验、显微分析等方法,研究了银、铌对316L的显微组织、抗菌性能、耐蚀性能等的影响.结果表明,铌可以有效细化晶粒,改善银在基体中的分布状况.316L含适量银时具有良好的抗菌性能和耐微生物腐蚀性能,但是过量的银易发生偏聚,降低材料的耐蚀性.当银含量为0.04％～0.06％,铌含量约0.1％（质量分数）时,改性316不锈钢可获得显微组织、耐蚀性能和抗菌性能的优化匹配.

Ag and Nb were chosen as modifying elements,and their effects on the microstructure,antibacterial property and corrosion resistance of 316L were studied by antibacterial experiment,electrochemical experiment and microscopic analysis.The results show that niobium can refine the grains of 316L effectively and improve the distribution of silver in the matrix.The 316L stainless steel containing an appropriate amount of silver has an excellent antibacterial efficacy to S.aureus and its microbiological corrosion resistance is improved while an excessive silver is prone to form segregation and degrade the corrosion resistance.When 316L the stainless steel contains about 0.04wt％～0.06 wt％ Ag and 0.l wt％ Nb,an optimized matching among microstructure,corrosion resistance and antibacterial properties can be obtained.