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Optimizing glass formation in ferromagnetic alloys through chemical fluxing

Floyd, Michael and Demetriou, Marios D. and Johnson, William L. (2018) Optimizing glass formation in ferromagnetic alloys through chemical fluxing. Scripta Materialia, 146 . pp. 312-315. ISSN 1359-6462.

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We identify a reduction reaction of boron oxide by Si during melt fluxing of the Fe-Co-Si-B-P system, which results in an unexpected and significant B enrichment and Si depletion in the alloy. Taking this reaction into account, an optimized Fe-Co-Si-B-P alloy free from oxide inclusions and demonstrating a global peak in glass forming ability is formed. Following a 22-h high temperature fluxing of the melt, alloy with composition Fe_(57.5)Co_(20.2)Si_(10.2)B_(2.1)P_(10) transforms to Fe_(57)Co_(19.2)Si_(6.8)B_(7.4)P_(9.6), and its critical rod diameter increases from 1 mm to 5 mm. The alloy also demonstrates excellent soft ferromagnetic performance characterized by a magnetic saturation of 1.53 T.

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Additional Information:© 2017 Acta Materialia. Published by Elsevier Ltd. Received 17 October 2017, Revised 11 December 2017, Accepted 13 December 2017, Available online 4 January 2018. This work was supported by the II-VI foundation and the Global Power Technology Group.
Funding AgencyGrant Number
Global Power Technology GroupUNSPECIFIED
Subject Keywords:Amorphous metal; Bulk metallic glass; Ferromagnetic; Fluxing
Record Number:CaltechAUTHORS:20180104-145907046
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Official Citation:Michael Floyd, Marios D. Demetriou, William L. Johnson, Optimizing glass formation in ferromagnetic alloys through chemical fluxing, Scripta Materialia, Volume 146, 15 March 2018, Pages 312-315, ISSN 1359-6462, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84096
Deposited By: George Porter
Deposited On:04 Jan 2018 23:05
Last Modified:04 Jan 2018 23:24

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