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Atmospheric RE-free Mg-based bulk metallic glass with high bio-corrosion resistance
a School of Materials Science and Engineering, Southwest University, Chongqing 400715, China
b State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
c Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China
d College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
e Chongqing Research Center for Advanced Materials, Chongqing Academy of Science and Technology, Chongqing 401123, China
A Mg69Zn27Ca4 bulk metallic glass was successfully prepared in atmospheric air.
This glassy alloy can be fabricated using recycled materials in atmospheric air.
This glassy alloy possesses high fracture strength and good corrosion resistance.
The findings are significant as a means of reducing the cost and manufacturability.
In this work, a rare earth (RE) free Mg69Zn27Ca4 bulk metallic glass (BMG) of diameter 1.5 mm was successfully fabricated by the injection casting method using recycled materials in atmospheric air. Without using high vacuum conditions, high purity starting materials and expensive rare earth materials, the findings of the work are of significance in reducing the cost and improving the manufacturability of BMGs. The results of the uniaxial compression tests further showed that there were no obvious differences between BMGs prepared under high vacuum or in atmospheric environment. The electrochemical polarization measurements in simulated physiological media revealed that the atmospheric Mg69Zn27Ca4 BMG manifested much lower passive current densities, higher pitting potential and a wider passive region than those of ZK60 and pure Mg alloys. The findings not only present Mg69Zn27Ca4 BMG as low cost material for potential biomedical applications, but also provide new insights into understanding of the effects of oxygen on glass formation.
http://www.sciencedirect.com/science/article/pii/S0022309313004201
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