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Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys
Weiwei Zhu1,2; Cancan Zhao2; Jian Zhou3; Chi Tat Kwok1,4; Fuzeng Ren2
2018-06-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume748Pages:961-969
Abstract

Bulk nanostructured Co90Ag10 immiscible alloys with Ag particle size of 10 nm have been fabricated by a combination of high energy ball milling and warm pressing. The Ag particle size increased to be 58 nm after annealing at 900 degrees C for 1 h. Pin-on-disk dry sliding wear tests show that even with over 20% hardness reduction, the annealed sample has similar wear resistance with the as pressed one. Wear induced strain in Co-Ag immiscible alloys could not force the formation of self-organized nanolayered structure or a supersaturated solid solution below the sliding surface. Electrochemical polarization tests show that such nanostructured Co-Ag alloys have no passive behaviour in the artificial saliva solution (ASS) but with high corrosion current densities. Energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) analysis show that the corrosion products are composed of insoluble cobalt (II) phosphate, cobalt hydroxide and silver chloride. Such corrosion behaviour in ASS suggests Co-Ag alloys are not suitable candidate for dental applications.

KeywordMicrostructure Nanostructured Co-ag Wear Corrosion
DOIhttps://doi.org/10.1016/j.jallcom.2018.03.213
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000429838900112
PublisherELSEVIER SCIENCE SA
The Source to ArticleWOS
Fulltext Access
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Cited Times [WOS]:5   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorFuzeng Ren
Affiliation1.Institute of Applied Physics and Materials Engineering, Faculty of Science & Technology, University of Macau, Macau
2.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
3.Shagang School of Iron and Steel, Soochow University, 178 Gan Jiang Dong Road, Suzhou, Jiangsu, China
4.Department of Electromechanical Engineering, Faculty of Science and Technology, The University of Macau, Macau
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Weiwei Zhu,Cancan Zhao,Jian Zhou,et al. Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,748:961-969.
APA Weiwei Zhu,Cancan Zhao,Jian Zhou,Chi Tat Kwok,&Fuzeng Ren.(2018).Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys.JOURNAL OF ALLOYS AND COMPOUNDS,748,961-969.
MLA Weiwei Zhu,et al."Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys".JOURNAL OF ALLOYS AND COMPOUNDS 748(2018):961-969.
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