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Heat Treatment of Molten Rapidly Quenched Precursor as a Method to Improve the Glass Forming Ability of Alloys

Published online by Cambridge University Press:  10 February 2011

V Manov ,
E Brook-Levinson ,
V. V. Molokanov ,
M. I Petrzhik  and
T. N. Mikhailova
V Manov
Affiliation:
Advanced Metal Technologies Ltd., Even Yehuda 40500, Israel
E Brook-Levinson
Affiliation:
Advanced Metal Technologies Ltd., Even Yehuda 40500, Israel
V. V. Molokanov
Affiliation:
A.A.Baikov Institute of Metallurgy and Materials Science, Leninsky Pr. 49, Moscow, 117911,Russia
M. I Petrzhik
Affiliation:
A.A.Baikov Institute of Metallurgy and Materials Science, Leninsky Pr. 49, Moscow, 117911,Russia
T. N. Mikhailova
Affiliation:
A.A.Baikov Institute of Metallurgy and Materials Science, Leninsky Pr. 49, Moscow, 117911,Russia
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Abstract

Improvement of glass forming ability (GFA) of two soft magnetic amorphous alloys (Fe75.5Ni1 3Si8.6B13.5 and Co69.6Fe1.3Mn4.5Si14.3B9 3Mo1) by heat treatment of melts prepared from different precursors (bulk ingot, rapidly quenched ribbons and granules) was studied. An assumption that the maximum undercooling ability corresponds to the maximum GFA was used to optimize the heat treatment mode. A temperature range was found by DTA for each alloy melt, favoring its undercooling (so called “undercoolable melt”). Usage of rapidly quenched precursor expands the range towards lower temperatures. GFA of the alloys was estimated by several melt quench techniques (casting, spinning and INROWASP). Fully amorphous samples with the thickness of 0.06–0.5 mm were prepared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 81
Copyright
Copyright © Materials Research Society 1999

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