Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys

Zhu, Weiwei1,2; Zhao, Cancan2; Zhou, Jian3; Kwok, Chi Tat1,4; Ren, Fuzeng2

2018-06-05

10.1016/j.jallcom.2018.03.213

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

1873-4669

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. (C) 2018 Elsevier B.V. All rights reserved.

Microstructure Nanostructured Co-Ag Wear Corrosion

SCI ; EI

英语

通讯

Science and Technology Development Fund (FDCT) of Macau S.A.R.[095/2014/A2]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000429838900112

ELSEVIER SCIENCE SA

20181304939290

Ball milling ; Binary alloys ; Chlorine compounds ; Cobalt compounds ; Corrosion ; Corrosive effects ; Dental alloys ; Energy dispersive spectroscopy ; Microstructure ; Particle size ; Silver alloys ; Silver halides ; Wear of materials ; Wear resistance ; X ray photoelectron spectroscopy

Dental Equipment and Supplies:462.3 ; Metals Corrosion:539.1 ; Precious Metals:547.1 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Univ Macau, Fac Sci & Technol, Inst Appl Phys & Mat Engn, Macau, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Soochow Univ, Shagang Sch Iron & Steel, 178 Gan Jiang Dong Rd, Suzhou, Jiangsu, Peoples R China
4.Univ Macau, Fac Sci & Technol, Dept Electromech Engn, Macau, Peoples R China

Zhu, Weiwei,Zhao, Cancan,Zhou, Jian,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.

Zhu, Weiwei,Zhao, Cancan,Zhou, Jian,Kwok, Chi Tat,&Ren, Fuzeng.(2018).Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys.JOURNAL OF ALLOYS AND COMPOUNDS,748,961-969.

Zhu, Weiwei,et al."Microstructure, sliding wear and corrosion behavior of bulk nanostructured Co-Ag immiscible alloys".JOURNAL OF ALLOYS AND COMPOUNDS 748(2018):961-969.