银对 2205 双相不锈钢组织和抗菌性能的影响。
Effect of silver on microstructure and antibacterial property of 2205 duplex stainless steel.
机构信息
Department of Chemical and Materials Engineering, National University of Kaohsiung, 700, Kaohsiung University Rd., Nanzih District, Kaohsiung 811, Taiwan, ROC.
New Materials R&D Department, China Steel Corporation, 1, Chung Kang Rd., Hsiao Kang, Kaohsiung 81233, Taiwan, Taiwan, ROC.
出版信息
Mater Sci Eng C Mater Biol Appl. 2016 Jun;63:376-83. doi: 10.1016/j.msec.2016.03.014. Epub 2016 Mar 3.
In this study, 2205 duplex stainless steel (DSS) was employed to enhance the antibacterial properties of material through silver doping. The results demonstrated that silver-doped 2205 DSS produces an excellent bacteria-inhibiting effect against Escherichia coli and Staphylococcus aureus. The antibacterial rates were 100% and 99.5%, respectively. Because the mutual solubility of silver and iron is very low in both the solid and liquid states, a silver-rich compound solidified and dispersed at the ferrite/austenite interface and the ferrite, austenite, and secondary austenite phases in silver-doped 2205 DSS. Doping 2205 DSS with silver caused the Creq/Nieq ratio of ferrite to decrease; however, the lower Creq/Nieq ratio promoted the rapid nucleation of γ2-austenite from primary α-ferrite. After 12h of homogenisation treatment at 1200 °C, the solubility of silver in the γ-austenite and α-ferrite phases can be increased by 0.10% and 0.09%, respectively. Moreover, silver doping was found to accelerate the dissolution of secondary austenite in a ferrite matrix during homogenisation.
在这项研究中，使用了 2205 双相不锈钢（DSS）通过银掺杂来提高材料的抗菌性能。结果表明，银掺杂的 2205 DSS 对大肠杆菌和金黄色葡萄球菌具有极好的抑菌效果。抗菌率分别达到了 100%和 99.5%。由于银和铁在固、液态下的互溶性都非常低，因此在银掺杂的 2205 DSS 中，富银化合物在铁素体/奥氏体界面以及铁素体、奥氏体和次生奥氏体相中凝固和弥散分布。银掺杂 2205 DSS 会降低铁素体的 Creq/Nieq 比值；然而，较低的 Creq/Nieq 比值促进了 γ2-奥氏体从初生α-铁素体中的快速形核。经过 1200°C 12h 的均化处理后，γ-奥氏体和α-铁素体相中银的溶解度分别增加了 0.10%和 0.09%。此外，银掺杂被发现可以加速均化过程中在铁素体基体中二次奥氏体的溶解。
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