The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing

L Besley, H Zhang, A. Molotnikov, Hidefumi Kishimoto, Takahiro A Kato, C. Davies, K. Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Abstract

Equal channel angular pressing (ECAP) has been used as an alternative manufacturing route for preparation of Nd2Fe14B-based anisotropic magnets, facilitating processing temperatures much lower than conventional die upsetting. While this method can produce a suitable texture and microstructure in permanent magnetic materials, it still remains novel; involving extremely high pressures which present a high risk of both process failure and die and tooling damage. Powder metallurgical processes frequently incorporate an external layer of secondary material (commonly an outer foil layer or can) for separation between the primary material and die as well as the control of surface effects such as friction through appropriate choice of secondary material. This work implements such modifications to this manufacturing route by incorporation of an outer layer of Cu foil, the addition of which negatively affected both the powder compaction and strength of texture produced via ECAP. Also investigated was the incorporation of solid Cu bar as part of the sample cross section. This modification facilitated processing without any compromise on observed magnetic properties, whilst also reducing damage to both the die and tooling. This type of methodology may aid in improving the reliability of producing bulk anisotropic permanent magnets via ECAP.

Original languageEnglish
Title of host publicationIOP Conference Series: Materials Science and Engineering
Subtitle of host publication7th International Conference on Nanomaterials by Severe Plastic Deformation, 2–7 July 2017, Sydney, Australia
Editors Yuri Estrin, Xiaozhou Liao
Number of pages6
Volume194
DOIs
Publication statusPublished - 8 May 2017
EventInternational Conference on Nanomaterials by Severe Plastic Deformation 2017 - Sydney, Australia
Duration: 2 Jul 20177 Jul 2017
Conference number: 7th
http://www.nanospd7.com/

Publication series

NameIOP Conference Series: Materials Science and Engineering
PublisherInstitute of Physics Publishing Ltd.
ISSN (Print)1757-8981
ISSN (Electronic)1757-899X

Conference

ConferenceInternational Conference on Nanomaterials by Severe Plastic Deformation 2017
Abbreviated titleNanoSPD7 2017
CountryAustralia
CitySydney
Period2/07/177/07/17
Internet address

Cite this

Besley, L., Zhang, H., Molotnikov, A., Kishimoto, H., Kato, T. A., Davies, C., & Suzuki, K. (2017). The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing. In Y. Estrin, & X. Liao (Eds.), IOP Conference Series: Materials Science and Engineering: 7th International Conference on Nanomaterials by Severe Plastic Deformation, 2–7 July 2017, Sydney, Australia (Vol. 194). [012043] (IOP Conference Series: Materials Science and Engineering). https://doi.org/10.1088/1757-899X/194/1/012043
Besley, L ; Zhang, H ; Molotnikov, A. ; Kishimoto, Hidefumi ; Kato, Takahiro A ; Davies, C. ; Suzuki, K. / The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing. IOP Conference Series: Materials Science and Engineering: 7th International Conference on Nanomaterials by Severe Plastic Deformation, 2–7 July 2017, Sydney, Australia. editor / Yuri Estrin ; Xiaozhou Liao. Vol. 194 2017. (IOP Conference Series: Materials Science and Engineering).
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abstract = "Equal channel angular pressing (ECAP) has been used as an alternative manufacturing route for preparation of Nd2Fe14B-based anisotropic magnets, facilitating processing temperatures much lower than conventional die upsetting. While this method can produce a suitable texture and microstructure in permanent magnetic materials, it still remains novel; involving extremely high pressures which present a high risk of both process failure and die and tooling damage. Powder metallurgical processes frequently incorporate an external layer of secondary material (commonly an outer foil layer or can) for separation between the primary material and die as well as the control of surface effects such as friction through appropriate choice of secondary material. This work implements such modifications to this manufacturing route by incorporation of an outer layer of Cu foil, the addition of which negatively affected both the powder compaction and strength of texture produced via ECAP. Also investigated was the incorporation of solid Cu bar as part of the sample cross section. This modification facilitated processing without any compromise on observed magnetic properties, whilst also reducing damage to both the die and tooling. This type of methodology may aid in improving the reliability of producing bulk anisotropic permanent magnets via ECAP.",
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Besley, L, Zhang, H, Molotnikov, A, Kishimoto, H, Kato, TA, Davies, C & Suzuki, K 2017, The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing. in Y Estrin & X Liao (eds), IOP Conference Series: Materials Science and Engineering: 7th International Conference on Nanomaterials by Severe Plastic Deformation, 2–7 July 2017, Sydney, Australia. vol. 194, 012043, IOP Conference Series: Materials Science and Engineering, International Conference on Nanomaterials by Severe Plastic Deformation 2017, Sydney, Australia, 2/07/17. https://doi.org/10.1088/1757-899X/194/1/012043

The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing. / Besley, L; Zhang, H; Molotnikov, A.; Kishimoto, Hidefumi; Kato, Takahiro A; Davies, C.; Suzuki, K.

IOP Conference Series: Materials Science and Engineering: 7th International Conference on Nanomaterials by Severe Plastic Deformation, 2–7 July 2017, Sydney, Australia. ed. / Yuri Estrin; Xiaozhou Liao. Vol. 194 2017. 012043 (IOP Conference Series: Materials Science and Engineering).

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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T1 - The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing

AU - Besley, L

AU - Zhang, H

AU - Molotnikov, A.

AU - Kishimoto, Hidefumi

AU - Kato, Takahiro A

AU - Davies, C.

AU - Suzuki, K.

PY - 2017/5/8

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N2 - Equal channel angular pressing (ECAP) has been used as an alternative manufacturing route for preparation of Nd2Fe14B-based anisotropic magnets, facilitating processing temperatures much lower than conventional die upsetting. While this method can produce a suitable texture and microstructure in permanent magnetic materials, it still remains novel; involving extremely high pressures which present a high risk of both process failure and die and tooling damage. Powder metallurgical processes frequently incorporate an external layer of secondary material (commonly an outer foil layer or can) for separation between the primary material and die as well as the control of surface effects such as friction through appropriate choice of secondary material. This work implements such modifications to this manufacturing route by incorporation of an outer layer of Cu foil, the addition of which negatively affected both the powder compaction and strength of texture produced via ECAP. Also investigated was the incorporation of solid Cu bar as part of the sample cross section. This modification facilitated processing without any compromise on observed magnetic properties, whilst also reducing damage to both the die and tooling. This type of methodology may aid in improving the reliability of producing bulk anisotropic permanent magnets via ECAP.

AB - Equal channel angular pressing (ECAP) has been used as an alternative manufacturing route for preparation of Nd2Fe14B-based anisotropic magnets, facilitating processing temperatures much lower than conventional die upsetting. While this method can produce a suitable texture and microstructure in permanent magnetic materials, it still remains novel; involving extremely high pressures which present a high risk of both process failure and die and tooling damage. Powder metallurgical processes frequently incorporate an external layer of secondary material (commonly an outer foil layer or can) for separation between the primary material and die as well as the control of surface effects such as friction through appropriate choice of secondary material. This work implements such modifications to this manufacturing route by incorporation of an outer layer of Cu foil, the addition of which negatively affected both the powder compaction and strength of texture produced via ECAP. Also investigated was the incorporation of solid Cu bar as part of the sample cross section. This modification facilitated processing without any compromise on observed magnetic properties, whilst also reducing damage to both the die and tooling. This type of methodology may aid in improving the reliability of producing bulk anisotropic permanent magnets via ECAP.

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DO - 10.1088/1757-899X/194/1/012043

M3 - Conference Paper

VL - 194

T3 - IOP Conference Series: Materials Science and Engineering

BT - IOP Conference Series: Materials Science and Engineering

A2 - Estrin, Yuri

A2 - Liao, Xiaozhou

ER -

Besley L, Zhang H, Molotnikov A, Kishimoto H, Kato TA, Davies C et al. The effect of Cu-based core-sheath configurations on the processing of Nd-Fe-B-based permanent magnets via equal-channel angular pressing. In Estrin Y, Liao X, editors, IOP Conference Series: Materials Science and Engineering: 7th International Conference on Nanomaterials by Severe Plastic Deformation, 2–7 July 2017, Sydney, Australia. Vol. 194. 2017. 012043. (IOP Conference Series: Materials Science and Engineering). https://doi.org/10.1088/1757-899X/194/1/012043