Abstract
The dynamic mechanical relaxation behaviour of Zr50Cu40Al10 bulk metallic glass was investigated by mechanical spectroscopy as a function of temperature. The mechanical spectra show the evidence of an "excess wing" process at the lower temperatures. The α-relaxation spectra of Zr50Cu40Al10 bulk metallic glass was described with a Kohlrausch-Williams-Watts (KWW) function, with the exponent βKWW = 0.5 ± 0.02. The fragility parameter m of the Zr50Cu40Al10 is m = 57 ± 5. The values of m and βKWW are found to agree with the correlation found for other glasses m = 250(± 30) - 320 βKWW [R. Böhmer, K.L. Ngai, C.A. Angell et al. J. Chem. Phys. 99 (1993) 4201-4209]. Aging experiments give strong evidence that the observed "excess wing" is a submerged secondary process and not part of the α process.
Original language | English |
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Pages (from-to) | 106-109 |
Number of pages | 4 |
Journal | Journal of Non-Crystalline Solids |
Volume | 407 |
DOIs | |
State | Published - 1 Jan 2015 |
Externally published | Yes |
Keywords
- Excess wing
- Fragility
- Main relaxation
- Mechanical spectroscopy
- Metallic glass