title: Effect of silver on microstructure and antibacterial property of 2205 duplex stainless steel.
abstract: 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.
authors.affiliation: Department of Chemical and Materials Engineering, National University of Kaohsiung, 700, Kaohsiung University Rd., Nanzih District, Kaohsiung 811, Taiwan, ROC.
authors.forename: Sheng-Min
authors.initials: SM
authors.lastname: Yang
authors.affiliation: Department of Chemical and Materials Engineering, National University of Kaohsiung, 700, Kaohsiung University Rd., Nanzih District, Kaohsiung 811, Taiwan, ROC.
authors.forename: Yi-Chun
authors.initials: YC
authors.lastname: Chen
authors.affiliation: New Materials R&D Department, China Steel Corporation, 1, Chung Kang Rd., Hsiao Kang, Kaohsiung 81233, Taiwan, Taiwan, ROC.
authors.forename: Yeong-Tsuen
authors.initials: YT
authors.lastname: Pan
authors.affiliation: Department of Chemical and Materials Engineering, National University of Kaohsiung, 700, Kaohsiung University Rd., Nanzih District, Kaohsiung 811, Taiwan, ROC.
authors.forename: Dong-Yih
authors.initials: DY
authors.lastname: Lin
mesh_terms: D020099:Coated Materials, Biocompatible / Q000737:chemistry* / Q000494:pharmacology; D003722:Dental Alloys / Q000737:chemistry; D004926:Escherichia coli / Q000187:drug effects; D005290:Ferric Compounds / Q000737:chemistry; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D012834:Silver / Q000737:chemistry*; D012995:Solubility; D013193:Stainless Steel / Q000737:chemistry*; D013211:Staphylococcus aureus / Q000187:drug effects; D014961:X-Ray Diffraction
chemical_list: D020099:Coated Materials, Biocompatible; D003722:Dental Alloys; D005290:Ferric Compounds; C093826:Austenite; D013193:Stainless Steel; C001215:ferrite; D012834:Silver
keywords: 2205 duplex stainless steel (DSS); Homogenizing; Microstructure; Phase transformation; Silver