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Formation of Metastable Phases Observed in the Zr-Co-Nb Multilayers upon Ion Beam Irradiation

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Abstract:

Six multilayered films with overall compositions of Co10Zr80Nb10, Co10Zr70Nb20, Co20Zr70Nb10, Co30Zr60Nb10, Co20Zr60Nb20 and Co10Zr60Nb30 were first prepared by alternatively depositing high pure metals onto the NaCl single crystal substrates and then irradiated by 160 keV xenon ions with the doses ranging from 2×1014 Xe+/cm2 to 9×1015 Xe+/cm2. It turns out that several metastable phases, e.g. amorphous phase, were formed in these metallic multilayered films upon irradiation. Meanwhile, some interesting phase transformations were also observed with increasing irradiation doses. Besides, the phase formation and transformation mechanism of non-equilibrium alloy phases are discussed in terms of thermodynamics of solids and atomic collision theory. KEYWORDS: Zr-Co-Nb system, metastable alloys, phase transformation, ion beam irradiation

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Periodical:

Advanced Materials Research (Volume 763)

Pages:

8-11

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.763.8

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Online since:

September 2013

Authors:

S.H. Liang, N. Li, N. Ding, J.H. Li, B.X. Liu

Keywords:

Ion Beam Irradiation, Metastable Alloys, Phase Transformation, Zr-Co-Nb System

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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