Crystal Growth in Amorphous Binary Alloys of Zr-Ni System

Abstract:

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A crystallization process in an amorphous state under isothermal condition is examined for binary alloys ZrNi and ZrNi2 by differential thermal analysis (DTA). Time dependence of DTA curves is measured at several constant temperatures just below crystallization temperature. The fraction of crystallized volume in amorphous state and its time evolution during isothermal annealing are measured. These data are analyzed by the Johnson-Mehl–Avrami formula. The Avrami exponent is 2.4±0.1 for ZrNi and 3~4 depending on the set temperature for ZrNi2. The activation energy for crystallization of amorphous ZrNi and ZrNi2 was estimated by plots of lnt1/2 vs. 1/T.

Info:

Periodical:

Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

675-678

DOI:

10.4028/www.scientific.net/AMR.26-28.675

Citation:

T. Fukami et al., "Crystal Growth in Amorphous Binary Alloys of Zr-Ni System", Advanced Materials Research, Vols. 26-28, pp. 675-678, 2007

Online since:

October 2007

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Price:

$35.00

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