Formation of Ni57Zr20Ti22Pb1 Amorphous Powders by Mechanical Alloying

Abstract:

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In the current study, the amorphization behavior of mechanically alloyed Ni57Zr20Ti22Pb1 powder was examined in details. The conventional X-ray diffraction results confirm that the fully amorphous powders formed after 5 hours of milling. The thermal stability of the Ni57Zr20Ti22Pb1 amorphous powders was investigated by differential scanning calorimeter (DSC). As the results demonstrated, the glass transition temperature (Tg) and the crystallization temperature (Tx) are 760 K and 850 K, respectively. The supercooled liquid region  is 90 K. The appearance of wide supercooled liquid region may be mainly due to the Pb additions which cause the increasing differences in atomic size of mechanically alloyed Ni57Zr20Ti22Pb1 powders.

Info:

Periodical:

Materials Science Forum (Volumes 539-543)

Main Theme:

Edited by:

T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran

Pages:

2767-2772

DOI:

10.4028/www.scientific.net/MSF.539-543.2767

Citation:

P. Y. Lee et al., "Formation of Ni57Zr20Ti22Pb1 Amorphous Powders by Mechanical Alloying", Materials Science Forum, Vols. 539-543, pp. 2767-2772, 2007

Online since:

March 2007

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Price:

$35.00

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