# Mechanism of continuous intergranular phase formation in Sm(Fe,Ti,V)12-based sintered magnets by post-sinter annealing

https://mdr.nims.go.jp/datasets/74a1e6cc-64ae-4198-a14f-08beabda6f39

## File

- [ManuscriptR.pdf](https://mdr.nims.go.jp/filesets/90b6fdcc-5826-4ca4-975d-4a6387dfa342/download) ([Detail](https://mdr.nims.go.jp/filesets/90b6fdcc-5826-4ca4-975d-4a6387dfa342.md))

## Id

74a1e6cc-64ae-4198-a14f-08beabda6f39

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-01-14T05:02:45.987158Z

## Updated at

2026-01-14T06:17:32.277970Z

## Published at

2026-01-14T07:22:14.114580Z

## Doi

https://doi.org/10.48505/nims.6125

## First published url

https://doi.org/10.1016/j.actamat.2025.121160

## Date published

2025-05-20

## Recorded date published

2025-8

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Mechanism of continuous intergranular phase formation in Sm(Fe,Ti,V)12-based
    sintered magnets by post-sinter annealing
  title_type: original
  lang: en

## Description

- description: We investigated the post-sinter annealing process in Sm8Fe77Ti5V8Al2
    (Cu-free) and Sm8Fe76.5Ti5V8Al2Cu0.5 (Cu-doped) magnets to explore the possibility
    of achieving high coercivity in the SmFe12-based sintered magnets. We found that
    optimal annealing of the Cu-doped magnet resulted in a significant increase in
    coercivity from 0.9 T to 1.5 T, the highest coercivity ever reported for a SmFe12-based
    magnet. This represents a 67 % improvement, compared to a 13 % increase in the
    Cu-free system. Combined with a larger remanence due to the minimization of the
    Fe2Ti phase, a good combination of extrinsic magnetic properties, a remanence
    of 0.71 T, a coercivity of 1.5 T and the maximum energy product of 84 kJ/m3 were
    obtained. The optimum post-sinter annealing temperature was found to be 1100 °C,
    where a continuous Sm-rich intergranular phase is formed due to the phase equilibrium
    with the ThMn12-type Sm(Fe,V,Ti)12 phase. The underlying mechanisms for the coercivity
    enhancement revealed by this work provide insights for the development of high-performance
    SmFe12-based magnets for practical applications.
  description_type: abstract
  lang: und

## Creator

- name: J.S. Zhang
  role: author
  orcid: https://orcid.org/0000-0002-5048-3878
- name: Xin Tang
  role: author
  orcid: https://orcid.org/0000-0001-6762-6145
- name: T. Ohkubo
  role: author
  orcid: https://orcid.org/0000-0003-3548-1951
- name: K. Hono
  role: author
  orcid: https://orcid.org/0000-0001-7367-0193
- name: H. Sepehri-Amin
  role: author
  orcid: https://orcid.org/0000-0002-7856-7897

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: Permanent magnet
  schema: not_defined
- subject: SmFe12
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Acta Materialia
  issn: '13596454'
  volume: '294'
  article_number: '121160'

## Conference



## Related item



## Funding

- identifier: JPMXP1122715503
  funder_name: Government of Japan Ministry of Education Culture Sports Science and
    Technology
- identifier: JPMXP1122715503
  funder_name: Research and Development
- identifier: JPMJER2201
  funder_name: JST ERATO
- identifier: JP23H01674
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23K26368
  funder_name: Japan Society for the Promotion of Science

## Instrument



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## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



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## Fileset

- id: 90b6fdcc-5826-4ca4-975d-4a6387dfa342
  filename: ManuscriptR.pdf
  content_type: application/pdf
  size: 11105748
  md5: 55fce3ecdfe26978c4ac1665b70e2c6e

## Thumbnail

fileset_id: 90b6fdcc-5826-4ca4-975d-4a6387dfa342
filename: ManuscriptR.pdf