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A Study on the Development of Environment-Friendly Ag-SnO2 Electric Contact Materials through a Powder Metallurgy
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Formation of Ni57Zr20Ti22Pb1 Amorphous Powders by Mechanical Alloying
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Formation of Ni57Zr20Ti22Pb1 Amorphous Powders by Mechanical Alloying

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Abstract:

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.

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Periodical:

Materials Science Forum (Volumes 539-543)

Pages:

2767-2772

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.2767

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Online since:

March 2007

Authors:

Pee Yew Lee, S.S. Hung, Jason S.C. Jang, Giin Shan Chen

Keywords:

Amorphous Phase, Glass Transition, Mechanical Alloying (MA), Nickel-Based Alloy, Supercooled Liquid Region

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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