کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7901391 1510435 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Main (α) relaxation and excess wing in Zr50Cu40Al10 bulk metallic glass investigated by mechanical spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Main (α) relaxation and excess wing in Zr50Cu40Al10 bulk metallic glass investigated by mechanical spectroscopy
چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 407, 1 January 2015, Pages 106-109
نویسندگان
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