UM
Affiliated with RCfalse
Status即將出版Forthcoming
A strong, wear- and corrosion-resistant, and antibacterial Co–30 at.% Cr–5 at.% Ag ternary alloy for medical implants
Jiang, Feilong1,2; Zhu, Weiwei1,3; Zhao, Cancan1; Li, Yulei1; Wei, Pengbo1,4; Wan, Tian1; Ye, Haixia1; Pan, Shuai1,2; Ren, Fuzeng1
2019-12-15
Source PublicationMaterials and Design
ISSN0264-1275
Volume184
AbstractA Co–30 at.% Cr–5 at.% Ag alloy was fabricated using a combination of mechanical alloying and spark plasma sintering. The microstructure of the alloy consisted of an ultrafine-grained ε-Co solid solution matrix with an average grain size of 167 nm and uniformly dispersed Ag particles with an average size of 72 nm and a minor amount of nanoscale σ-precipitates with size of 23 nm. Such particular microstructure enabled high hardness of 650 HV and compressive strength of up to 2.3 GPa. Pin-on-disk dry sliding wear tests show that the present alloy exhibited superior wear resistance, with wear rate in the order of 10 mm/(N·m) upon sliding against alumina. The wear-induced microstructure extended only ~500 nm from the sliding surface, with elongated Ag particles. The alloy also demonstrated high resistance to corrosion in artificial saliva solution, due to the formation of a protective passive film. Moreover, the addition of Ag also significantly enhanced the antibacterial activity of Co–Cr alloys, with antibacterial rates against E. coli and S. aureus of 90.5% and 72.6%, respectively. The present alloy with a combination of high strength, superior wear- and corrosion-resistance, and excellent antibacterial activity offers a promising candidate for medical implants.
KeywordAntibacterial Co-Cr-Ag alloy Corrosion Sliding wear Spark plasma sintering
DOI10.1016/j.matdes.2019.108190
URLView the original
Language英語English
Scopus ID2-s2.0-85072189555
Fulltext Access
Citation statistics
Cited Times [WOS]:11   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China
3.Institute of Applied Physics and Materials Engineering, Faculty of Science & Technology, University of Macau, China
4.Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, Hong Kong
Recommended Citation
GB/T 7714
Jiang, Feilong,Zhu, Weiwei,Zhao, Cancan,et al. A strong, wear- and corrosion-resistant, and antibacterial Co–30 at.% Cr–5 at.% Ag ternary alloy for medical implants[J]. Materials and Design,2019,184.
APA Jiang, Feilong,Zhu, Weiwei,Zhao, Cancan,Li, Yulei,Wei, Pengbo,Wan, Tian,Ye, Haixia,Pan, Shuai,&Ren, Fuzeng.(2019).A strong, wear- and corrosion-resistant, and antibacterial Co–30 at.% Cr–5 at.% Ag ternary alloy for medical implants.Materials and Design,184.
MLA Jiang, Feilong,et al."A strong, wear- and corrosion-resistant, and antibacterial Co–30 at.% Cr–5 at.% Ag ternary alloy for medical implants".Materials and Design 184(2019).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Jiang, Feilong]'s Articles
[Zhu, Weiwei]'s Articles
[Zhao, Cancan]'s Articles
Baidu academic
Similar articles in Baidu academic
[Jiang, Feilong]'s Articles
[Zhu, Weiwei]'s Articles
[Zhao, Cancan]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Jiang, Feilong]'s Articles
[Zhu, Weiwei]'s Articles
[Zhao, Cancan]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.