# Micromechanics of the sintering force in sintering by bulk diffusion

https://mdr.nims.go.jp/datasets/b660708a-0535-4cd5-818c-a153fea82da5

## File

- [manuscript with figures.pdf](https://mdr.nims.go.jp/filesets/0826ef5c-ad26-4441-b4a9-526992f0928f/download) ([Detail](https://mdr.nims.go.jp/filesets/0826ef5c-ad26-4441-b4a9-526992f0928f.md))

## Id

b660708a-0535-4cd5-818c-a153fea82da5

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-10-06T08:51:29.232485Z

## Updated at

2026-10-06T23:29:29.717089Z

## Published at

2026-10-07T01:24:21.698624Z

## Doi

https://doi.org/10.48505/nims.8641

## First published url

https://doi.org/10.1016/j.actamat.2026.122759

## Date published

2026-09-12

## Recorded date published

2026-11

## Resource type

journal_article

## Manuscript type

authors_original

## Collection



## Title

- title: Micromechanics of the sintering force in sintering by bulk diffusion
  title_type: original
  lang: en

## Description

- description: Densification in sintering originates from the relative approach of
    contacting particles, which is driven by the sintering force. This concept has
    been rigorously established for grain boundary diffusion, where the driving force
    is determined by the local curvature at the neck. For bulk diffusion, however,
    the diffusion potential is governed by the Laplace equation in the particle interior,
    so the driving force is inherently non-local and depends on the overall surface
    morphology of the particle; a rigorous definition of the sintering force has been
    lacking. Here, a microscopic theory of the sintering force for bulk diffusion
    is developed by decomposing the diffusion potential into non-densifying and densifying
    solutions. The sintering force takes the same form as that for grain boundary
    diffusion when the neck curvature is replaced by an effective curvature—a virtual
    curvature that would produce a chemical potential equal to the area-averaged value
    on the contact face. Front-tracking boundary-element simulations of two-particle
    sintering show that the sintering force exhibits a broad peak as a function of
    the contact radius and vanishes at the equilibrium shape. The effective curvature,
    sintering force, geometric factor, and relative velocity are presented as functions
    of the contact radius, so that the dynamics of sintering can be predicted from
    the particle geometry alone.
  description_type: abstract
  lang: eng

## Creator

- name: Fumihiro Wakai
  role: author
  orcid: https://orcid.org/0000-0002-8391-139X
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Materials Manufacturing Field/Ceramic
    Matrix Composites Group
- name: Gaku Okuma
  role: author
  orcid: https://orcid.org/0000-0002-2997-9166
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Materials Manufacturing Field/Ceramic
    Matrix Composites Group
- name: Kazuya Shimoda
  role: author
  orcid: https://orcid.org/0000-0001-9051-6534
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Materials Manufacturing Field/Ceramic
    Matrix Composites Group
- name: Hideki Kakisawa
  role: author
  orcid: https://orcid.org/0000-0002-7448-0989
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Materials Manufacturing Field/Ceramic
    Matrix Composites Group

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: sintering
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: ACTA MATERIALIA
  issn: '13596454'
  volume: '320'
  article_number: '122759'

## Conference



## Related item



## Funding

- funder_name: Japan Society for the Promotion of Science
- identifier: JP24K08104
  funder_name: Japan Society for the Promotion of Science London

## Instrument



## Instrument operator



## 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



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: '0826ef5c-ad26-4441-b4a9-526992f0928f'
  filename: manuscript with figures.pdf
  content_type: application/pdf
  size: 1944156
  md5: 8f011e8fae67337f073e72859c9f5a3a

## Thumbnail

fileset_id: '0826ef5c-ad26-4441-b4a9-526992f0928f'
filename: manuscript with figures.pdf