Pressure-induced polyamorphism in Nd sub(60)Fe sub(30)Al sub(10) and Ce sub(70)Al sub(10)Cu sub(20) metallic glasses by high-energy X-ray diffraction and electrical resistance measurements

In situ high-energy X-ray diffraction of Nd sub(60)Fe sub(30)Al sub(10) and Ce sub(70)Al sub(10)Cu sub(20) metallic glasses is carried out under high pressure. During compression, Ce sub(70)Al sub(10)Cu sub(20) and Nd sub(60)Fe sub(30)Al sub(10) exhibit a polyamorphic transition from low-density sta...

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Bibliographic Details
Published in:High pressure research 2017-01, Vol.37 (1), p.11-17
Main Authors: Zhang, Linji, Wang, Junlong, Tang, Fei, Yang, HongWang, Liu, Xiuru, Zhao, Yong, Yang, Wenge
Format: Article
Language:English
Subjects:
Amorphous materials
AMORPHOUS STRUCTURE
Compressing
Discontinuity
ELECTRICAL CONDUCTIVITY
Electrical resistance
Electrical resistivity
GLASSES
MEASUREMENT
Metallic glasses
PHASES
X ray diffraction
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Summary:In situ high-energy X-ray diffraction of Nd sub(60)Fe sub(30)Al sub(10) and Ce sub(70)Al sub(10)Cu sub(20) metallic glasses is carried out under high pressure. During compression, Ce sub(70)Al sub(10)Cu sub(20) and Nd sub(60)Fe sub(30)Al sub(10) exhibit a polyamorphic transition from low-density state below 2.0 and 10.0GPa, to high-density state above 8.4 and 21.1GPa, respectively. The intermediate hysteresis regions are the mixture of both phases. Electrical resistance measurements under high pressure show that Ce sub(70)Al sub(10)Cu sub(20) display a discontinuous change in pressure dependence curve of resistivity at around 1.7GPa. The addition of Fe atom gives a significant standoff of phase transition pressure in Nd sub(60)Fe sub(30)Al sub(10). The results in this work suggest that the solute element and microstructure of lanthanide solvent aggregates have implications on the polyamorphic transition in metallic glasses.
ISSN:0895-7959
1477-2299
DOI:10.1080/08957959.2016.1269898