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Title: Stabilization of metallic supercooled liquid and bulk amorphous alloys

Abstract

Bulk metallic materials have ordinarily been produced by melting and solidification processes for the last several thousand years. However, metallic liquid is unstable at temperatures below the melting temperature and solidifies immediately into crystalline phases. Consequently, all bulk engineering alloys are composed of a crystalline structure. Recently, this common concept was exploded by the findings of the stabilization phenomenon of the supercooled liquid for a number of alloys in the Mg-, lanthanide-, Zr-, Ti-, Fe-, Co-, Pd-Cu- and Ni-based systems. The alloys with the stabilized supercooled liquid state have three features in their alloy components, i.e., multicomponent systems, significant atomic size ratios above 12%, and negative heats of mixing. The stabilization mechanism has also been investigated from experimental data of structure analyses and fundamental physical properties. The stabilization has enabled the production of bulk amorphous alloys in the thickness range of 1--100 mm by using various casting processes. Bulk amorphous Zr-based alloys exhibit high mechanical strength, high fracture toughness and good corrosion resistance and have been used for sporting goods materials. The stabilization also leads to the appearance of a large supercooled liquid region before crystallization and enables high-strain rate superplasticity through Newtonian flow. The discovery of the stabilization phenomenon,more » followed by the clarification of the stabilization criteria of the supercooled liquid, will promise the future definite development of bulk amorphous alloys as new basic science and engineering materials.« less

Authors:
Publication Date:
Research Org.:
Tohoku Univ., Sendai (JP)
OSTI Identifier:
20015241
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 48; Journal Issue: 1; Other Information: PBD: 1 Jan 2000; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MICROSTRUCTURE; METALLIC GLASSES; LIQUID METALS; AMORPHOUS STATE; STABILIZATION; SOLIDIFICATION; MECHANICAL PROPERTIES; MAGNETIC PROPERTIES

Citation Formats

Inoue, Akihisa. Stabilization of metallic supercooled liquid and bulk amorphous alloys. United States: N. p., 2000. Web. doi:10.1016/S1359-6454(99)00300-6.
Inoue, Akihisa. Stabilization of metallic supercooled liquid and bulk amorphous alloys. United States. https://doi.org/10.1016/S1359-6454(99)00300-6
Inoue, Akihisa. 2000. "Stabilization of metallic supercooled liquid and bulk amorphous alloys". United States. https://doi.org/10.1016/S1359-6454(99)00300-6.
@article{osti_20015241,
title = {Stabilization of metallic supercooled liquid and bulk amorphous alloys},
author = {Inoue, Akihisa},
abstractNote = {Bulk metallic materials have ordinarily been produced by melting and solidification processes for the last several thousand years. However, metallic liquid is unstable at temperatures below the melting temperature and solidifies immediately into crystalline phases. Consequently, all bulk engineering alloys are composed of a crystalline structure. Recently, this common concept was exploded by the findings of the stabilization phenomenon of the supercooled liquid for a number of alloys in the Mg-, lanthanide-, Zr-, Ti-, Fe-, Co-, Pd-Cu- and Ni-based systems. The alloys with the stabilized supercooled liquid state have three features in their alloy components, i.e., multicomponent systems, significant atomic size ratios above 12%, and negative heats of mixing. The stabilization mechanism has also been investigated from experimental data of structure analyses and fundamental physical properties. The stabilization has enabled the production of bulk amorphous alloys in the thickness range of 1--100 mm by using various casting processes. Bulk amorphous Zr-based alloys exhibit high mechanical strength, high fracture toughness and good corrosion resistance and have been used for sporting goods materials. The stabilization also leads to the appearance of a large supercooled liquid region before crystallization and enables high-strain rate superplasticity through Newtonian flow. The discovery of the stabilization phenomenon, followed by the clarification of the stabilization criteria of the supercooled liquid, will promise the future definite development of bulk amorphous alloys as new basic science and engineering materials.},
doi = {10.1016/S1359-6454(99)00300-6},
url = {https://www.osti.gov/biblio/20015241}, journal = {Acta Materialia},
issn = {1359-6454},
number = 1,
volume = 48,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}