Effect of minor-addition of Fe on structural and mechanical properties of CuZrAl bulk metallic glass
(1. Engineering Research Center of Materials Behavior and Design of Ministry of Education,
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Jiangsu Institute of Advanced Materials, Danyang 212300, China;
3. National Laboratory of Solid State Microstructures and Center for Materials Analysis,
Nanjing University, Nanjing 210093, China)
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2. Jiangsu Institute of Advanced Materials, Danyang 212300, China;
3. National Laboratory of Solid State Microstructures and Center for Materials Analysis,
Nanjing University, Nanjing 210093, China)
Abstract: The CuZrAl bulk metallic glass with minor-addition of Fe was prepared by rapid quenching method. The structures were examined by X-ray diffraction (XRD). The effect of Fe on the glass-forming ability was studied by differential scanning calorimetry (DSC). The minor-addition of Fe obviously extends the supercooled liquid region ΔTx. The plastic strain of the Cu44Zr48Al7Fe bulk metallic glass is about 1.5%. The microstructures were examined by transmission electron microscopy (TEM). It is found that when 1%−2% Fe (mole fraction) were introduced into the CuZrAl alloy matrix, nanoscale phase separation occurs in the as-prepared Cu44Zr48Al7Fe bulk metallic glass.
Key words: bulk metallic glass; microstructure; mechanical property; phase separation; Fe addition