Stainless steels (SS) are one of the most widely used, affordable materials in public areas, but suffer from a lack of antibacterial property. Unfortunately, traditional steel casting alloying strategy has limits to add Ag due to the extremely low solubility of Ag in SS. The present work demonstrates a novel powder metallurgy technology to fabricate Ag-contained SS with a unique microstructure in which the average distance between Ag particles is similar to the size of a typical bacterium, enabling the direct contact killing mechanism. Consequently, the new Ag-contained SS possesses an excellent and stable antibacterial rate of over 99%.

中文翻译：

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具有强力银纳米颗粒的新型不锈钢具有出色的抗菌性能

不锈钢（SS）是公共场所使用最广泛，价格最便宜的材料之一，但缺乏抗菌性能。不幸的是，由于Ag在SS中的溶解度极低，传统的钢铸合金策略限制了Ag的添加。本工作证明了一种新颖的粉末冶金技术，可制造出具有独特微观结构的含银SS，其中银颗粒之间的平均距离与典型细菌的大小相似，从而实现了直接的接触杀灭机制。因此，新型的含银的SS具有超过99％的出色且稳定的抗菌率。