Calculations of potential functions and thermophysical behaviors for La{sub 62}Al{sub 14}Ni{sub 12}Cu{sub 12} and Cu{sub 46}Zr{sub 44}Al{sub 7}Y{sub 3} bulk metallic glasses
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 (China)
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083 (China)
Bulk metallic glasses La{sub 62}Al{sub 14}Ni{sub 12}Cu{sub 12} and Cu{sub 46}Zr{sub 44}Al{sub 7}Y{sub 3} were prepared by copper mold suction casting. The thermal-physical behaviors of bulk metallic glasses were investigated by means of x-ray diffraction, differential scanning calorimetry, ultrasonic techniques, and dilatometry. By calculating the Mie potential function from experimental data, the values of potential function powers (m and n) and related physical parameters such as the mean binding energy, etc., are obtained. Thus, unlike what some people have done by assuming values of m-n (7-14), the values of average nearest-neighbor separation r{sub 0} and effective depth of pair potential {phi}{sub 0} can be obtained from calculated values of m and n from Mie potential functions and they agree very well with the results in the literature. The calculations can be well consistent with the thermophysical behaviors by comparing the two amorphous alloys. In addition, it was enhanced that the effective depth of pair potential correlated with the glass-forming ability of bulk metallic glass.
- OSTI ID:
- 21137337
- Journal Information:
- Journal of Applied Physics, Vol. 103, Issue 11; Other Information: DOI: 10.1063/1.2937204; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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