Change of nanostructure in (Fe0.5Co0.5) 72B20Si4Nb4 metallic glass on annealing

Akihiko Hirata; Yoshihiko Hirotsu; Kenji Amiya; Nobuyuki Nishiyama; Akihisa Inoue

doi:10.4028/0-87849-428-6.2077

Change of nanostructure in (Fe_0.5Co_0.5) ₇₂B₂₀Si₄Nb₄ metallic glass on annealing

Akihiko Hirata^*, Yoshihiko Hirotsu, Kenji Amiya, Nobuyuki Nishiyama, Akihisa Inoue

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Citations (Scopus)

Abstract

Nanoscale structural change in (Fe_0.5Co_0.5) ₇₂B₂₀Si₄Nb₄ bulk glassy alloy on annealing has been investigated using transmission electron microscopy. On annealing at temperatures above 773K, electron diffraction intensity analysis showed a clear structure change for a Cr23C6-type local atomic ordering. The local structure formation of Cr₂₃C₆-type nanophase was confirmed by nanobeam electron diffraction. A development process of dense precipitates of the Cr₂₃C₆-type nanophase was further studied by high-resolution electron microscopy. It was found that the formation of the highly-dense nanoprecipitates provides an increase in Vickers hardness.

Original language	English
Title of host publication	Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006
Publisher	Trans Tech Publications Ltd
Pages	2077-2081
Number of pages	5
Edition	PART 2
ISBN (Print)	0878494286, 9780878494286
DOIs	https://doi.org/10.4028/0-87849-428-6.2077
Publication status	Published - 2007
Externally published	Yes
Event	5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006 - Vancouver, Canada Duration: 2006 Jul 4 → 2006 Jul 8

Publication series

Name	Materials Science Forum
Number	PART 2
Volume	539-543
ISSN (Print)	0255-5476
ISSN (Electronic)	1662-9752

Conference

Conference	5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006
Country/Territory	Canada
City	Vancouver
Period	06/7/4 → 06/7/8

Keywords

Bulk metallic glass
Crystallization
Iron-based alloy
Nanostructure
Transmission electron microscopy
Vickers hardness

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.4028/0-87849-428-6.2077

Cite this

Hirata, A., Hirotsu, Y., Amiya, K., Nishiyama, N., & Inoue, A. (2007). Change of nanostructure in (Fe_0.5Co_0.5) ₇₂B₂₀Si₄Nb₄ metallic glass on annealing. In Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006 (PART 2 ed., pp. 2077-2081). (Materials Science Forum; Vol. 539-543, No. PART 2). Trans Tech Publications Ltd. https://doi.org/10.4028/0-87849-428-6.2077

Change of nanostructure in (Fe_0.5Co_0.5) ₇₂B₂₀Si₄Nb₄ metallic glass on annealing. / Hirata, Akihiko; Hirotsu, Yoshihiko; Amiya, Kenji et al.
Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006. PART 2. ed. Trans Tech Publications Ltd, 2007. p. 2077-2081 (Materials Science Forum; Vol. 539-543, No. PART 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hirata, A, Hirotsu, Y, Amiya, K, Nishiyama, N & Inoue, A 2007, Change of nanostructure in (Fe_0.5Co_0.5) ₇₂B₂₀Si₄Nb₄ metallic glass on annealing. in Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006. PART 2 edn, Materials Science Forum, no. PART 2, vol. 539-543, Trans Tech Publications Ltd, pp. 2077-2081, 5th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2006, Vancouver, Canada, 06/7/4. https://doi.org/10.4028/0-87849-428-6.2077

Hirata A, Hirotsu Y, Amiya K, Nishiyama N, Inoue A. Change of nanostructure in (Fe_0.5Co_0.5) ₇₂B₂₀Si₄Nb₄ metallic glass on annealing. In Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006. PART 2 ed. Trans Tech Publications Ltd. 2007. p. 2077-2081. (Materials Science Forum; PART 2). doi: 10.4028/0-87849-428-6.2077

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abstract = "Nanoscale structural change in (Fe0.5Co0.5) 72B20Si4Nb4 bulk glassy alloy on annealing has been investigated using transmission electron microscopy. On annealing at temperatures above 773K, electron diffraction intensity analysis showed a clear structure change for a Cr23C6-type local atomic ordering. The local structure formation of Cr23C6-type nanophase was confirmed by nanobeam electron diffraction. A development process of dense precipitates of the Cr23C6-type nanophase was further studied by high-resolution electron microscopy. It was found that the formation of the highly-dense nanoprecipitates provides an increase in Vickers hardness.",

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AU - Inoue, Akihisa

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