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

24 引文 (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

Stainless Steel
stainless steel
Silver
silver
microstructure
mechanical properties
mechanical property
steel
antibacterial properties
Staphylococcus aureus
testing
Austenite
Ions
ions
Escherichia coli
Bacteria
bacterium
ion
bacteria

ASJC Scopus subject areas

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

引用此文

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title = "Development of silver-containing austenite antibacterial stainless steels for biomedical applications Part I: Microstructure characteristics, mechanical properties and antibacterial mechanisms",
abstract = "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 {\AA}. 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{\%}.",
keywords = "Ag phase, Ag ion release, Antibacterial mechanism, Antibacterial stainless steel, Mechanical properties, Microstructure",
author = "Huang, {Chiung Fang} and Chiang, {Hsi Jen} and Lan, {Wen Chien} and Chou, {Hsin Hua} and Ou, {Keng Liang} and Yu, {Chih Hua}",
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T2 - Microstructure characteristics, mechanical properties and antibacterial mechanisms

AU - Huang, Chiung Fang

AU - Chiang, Hsi Jen

AU - Lan, Wen Chien

AU - Chou, Hsin Hua

AU - Ou, Keng Liang

AU - Yu, Chih Hua

PY - 2011/5

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N2 - 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%.

AB - 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%.

KW - Ag phase

KW - Ag ion release

KW - Antibacterial mechanism

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KW - Mechanical properties

KW - Microstructure

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