摘要
The glass-forming ability and the thermal stability of Cu45Zr45AI5Ni5 metallic glass were systematically investigated by the differential scanning calorimetry. The activation energies for the glass transition and the onset crystallization and the crystallization peak were calculated to be 255.1, 308.7 and 311.5 kJ/mol, respectively, while the corresponding liquid fragility was determined to be 23.4. By controlling the casting process, Cu45Zr45AI5Ni5 bulk metallic glass composite with the presence of ductile B2 CuZr phase was fabricated. The composite shows a pronounced plastic strain of 6.8 ~ 0.05% with obvious work hardening, which results from the formation of multiple shear bands and the deformation-induced martensitic transformation.
The glass-forming ability and the thermal stability of Cu45Zr45AI5Ni5 metallic glass were systematically investigated by the differential scanning calorimetry. The activation energies for the glass transition and the onset crystallization and the crystallization peak were calculated to be 255.1, 308.7 and 311.5 kJ/mol, respectively, while the corresponding liquid fragility was determined to be 23.4. By controlling the casting process, Cu45Zr45AI5Ni5 bulk metallic glass composite with the presence of ductile B2 CuZr phase was fabricated. The composite shows a pronounced plastic strain of 6.8 ~ 0.05% with obvious work hardening, which results from the formation of multiple shear bands and the deformation-induced martensitic transformation.
基金
supported by the Chinese Scholarship Council (CSC)
the Natural Science Foundation of Shandong Province (No. Z2008F08)
the Excellent Youth Project of the Natural Science Foundation of Shandong Province (No. JQ201012)
the National Basic Research Program of China (973 Program, No. 2007CB613901)
the National Natural Science Foundation of China (Nos. 50631010 and 50831003)
