Enhancement of glass-forming ability and bio-corrosion resistance of Zr-Co-Al bulk metallic glasses by the addition of Ag

被引：35
作者：
Zhang, C. [1 ]
Li, N. [1 ]
Pan, J. [1 ]
Guo, S. F. [1 ]
Zhang, M. [1 ]
Liu, L. [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷
关键词：
Metallic glasses; Rapid-solidification; Corrosion; Thermal analysis; AMORPHOUS ALLOY; CU ALLOYS; PLASTICITY; BEHAVIOR; BIOCOMPATIBILITY; SURFACE;
D O I：
10.1016/j.jallcom.2010.02.078
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel Ni and Cu-free Zr-based bulk metallic glass (BMG) system with enhancement of glass-forming ability (GFA) and bio-corrosion resistance was prepared by copper mold casting by the addition of Ag. It was found that the addition of Ag can considerably enhance the glass-forming ability, as indicated by the increase of the critical glass dimension from 3mm diameter of the ternary system to over 10mm in the alloy of Zr53Co18.5Al23.5Ag5. The bio-corrosion behaviors of the Zr-based BMGs in phosphate buffered solution (PBS) were investigated by electrochemical polarization at 310 K. It was found that the addition of appropriate amount of Ag can enhance the corrosion resistance of the BMGs. The X-ray photoelectron spectroscopy (XPS) indicated that the formation of an Al2O3-enriched passive film is mainly responsible for the high corrosion resistance of Ag-bearing alloy in phosphate buffered solution. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：S163 / S167
页数：5
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