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A plastic Ni-free Zr-based bulk metallic glass

已有 3847 次阅读 2012-6-23 23:16 |个人分类:非晶前沿|系统分类:论文交流| metallic, glass

A plastic Ni-free Zr-based bulk metallic glass with high specific strength and good corrosion properties in simulated body fluid

S.F. Guo^a^,^b^,

Z. Liu^b,

K.C. Chan^b,

W. Chen^b,

H.J. Zhang^c,

J.F. Wang^c,

P. Yu^d

^a Southwest University, School of Materials Science and Engineering, No.2 Tiansheng Road, BeiBei District, Chongqing 400715, China
^b Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China
^c National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
^d College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400047, China

Received 12 May 2012. Revised 4 June 2012. Accepted 16 June 2012. Available online 22 June 2012.

http://dx.doi.org/10.1016/j.matlet.2012.06.057

Abstract
The mechanical properties at room temperature and the corrosion behavior in simulated body fluid (PBS) at 37 °C of a Ni-free Zr_62.3Cu_22.5Fe_4.9Al_6.8Ag_3.5 bulk metallic glass (BMG) were investigated. This BMG exhibits a good room temperature plasticity of 8%, a yield strain of 1.9% and a high fracture strength of about 1800 MPa. Interestingly, the novel Zr-rich BMG possesses a specific strength (σ/ρ) of about 280 MPa cm³/g higher than that of conventional biomedical Ti6Al4V alloy and 316 L stainless steel. In addition, this alloy also has a high corrosion resistance with a low corrosion penetration rate in simulated body fluids (PBS). The present Ni-free Zr-rich BMG with a critical diameter above 1 cm, together with the high specific strength, large plasticity and good corrosion resistance in PBS, has excellent potential in biomedical applications.

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