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)−320βKWW [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.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
