中文摘要：

抗菌性能的发挥取决与材料表面抗菌相的分布,采用MEVVA源高能离子注入机对A304不锈钢进行不同剂量Ag的注入,利用SEM、EDX对材料表面形貌和成分进行分析和通过后期的热处理和抗菌实验发现：样品对大肠杆菌、金霉球菌的抗菌效果达到96.6%和97.1%;过饱和注入的Ag出现Ag的团聚现象,不利于抗菌效果的发挥;非饱和往复注入通过热处理后出现含Ag弥散相。Ag的充分析出是材料发挥抗菌性能的所在,而饱和注入的不锈钢则出现大量银的团聚现象。

英文摘要：

Antibacterial mechanism depends on the distribution of material surfaces antibacterial phase. Ag ions were implanted to A304 stainless steel by MEVVA ion source. By heat treatment, the samples were detected by SEM, EDX and antibacterial test. The results show： the sample has high antibacterial rate：96.6% for Escherichia Coli and 97.1% for Staphylococcus aureus. Supersaturated implanted Ag forms the aggregation phase thus lower antibacterial effect, unsaturated reciprocating implanted Ag forms precipitation phase after heat treatment. The sufficient precipitation of Ag is the key factor for antibacterial, however, the stainless steel for saturated implanted Ag can form the aggregation phase.