Development of silver-containing austenite antibacterial stainless steels for biomedical applications Part I: Microstructure characteristics, mechanical properties and antibacterial mechanisms

Chiung Fang Huang, Hsi Jen Chiang, Wen Chien Lan, Hsin Hua Chou, Keng Liang Ou, Chih Hua Yu

研究成果: 雜誌貢獻文章

27 引文 斯高帕斯(Scopus)

摘要

The as-quenched (AQ) microstructure of the Ag-containing alloys was found to be essentially a mixture of austenite (γ) and Ag phases. The Ag phase precipitates had a face-centered-cubic structure and lattice parameter a = 4.09 Å. When the alloy contained Ag ≥0.2 wt%, the mechanical properties were slightly enhanced because of the precipitate strengthening by the Ag phase precipitates. Moreover, the Ag-containing alloys exhibited ductile fracture after tensile testing. The results of an antibacterial test revealed that the Ag phase precipitates play a key role in the antibacterial mechanism of Ag-containing alloys: Ag+ ions released from the Ag phase precipitates can kill bacteria. It is suggested that as AISI 316L alloy has an Ag content ≥0.2 wt%, it will have excellent antibacterial properties against both Staphylococcus aureus and Escherichia coli, with an antibacterial rate of nearly 100%.
原文英語
頁(從 - 到)449-457
頁數9
期刊Biofouling
27
發行號5
DOIs
出版狀態已發佈 - 五月 2011

    指紋

ASJC Scopus subject areas

  • Aquatic Science
  • Water Science and Technology
  • Applied Microbiology and Biotechnology

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