Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
75 (1994), S. 4438-4441
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The formation, structure, and the crystallization of Al85YxNi15−x are studied using x-ray diffraction and differential scanning calorimetry. The results show two distinct glasses depending on composition. Y-rich glasses (x≥8) are homogeneous with a well-defined glass transition. The x-ray diffraction patterns have a single main peak. These glasses crystallize through a nucleation and growth process. Y-poor glasses (x〈8) do not show a glass transition and have a shoulder on the high-angle side of the main peak in their x-ray diffraction patterns. We show that the shoulder peak is due to quenched-in Al nuclei. These glasses are shown to crystallize through the growth of these nuclei. Y-rich glasses (x≥8) are more stable as demonstrated by the presence of the glass transition and their higher crystallization temperature, enthalpy, and activation energy. The occurrence of a prepeak for all compositions is attributed to Y-Y pairs.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.355958
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