# Strength-limiting defects evolved from heterogeneities during the sintering of high-purity submicron alumina powder

https://mdr.nims.go.jp/datasets/da702c6d-51ef-4dd8-9f64-88a9793e86a4

## File

- [1-s2.0-S095522192500500X-main+(1)-圧縮.pdf](https://mdr.nims.go.jp/filesets/889d847f-0cb2-4a39-bd2a-d4cd522931b4/download) ([Detail](https://mdr.nims.go.jp/filesets/889d847f-0cb2-4a39-bd2a-d4cd522931b4.md))

## Id

da702c6d-51ef-4dd8-9f64-88a9793e86a4

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-07-23T00:33:02.667461Z

## Updated at

2025-07-23T03:30:20.592497Z

## Published at

2025-07-23T03:18:46.583070Z

## Doi



## First published url

https://doi.org/10.1016/j.jeurceramsoc.2025.117679

## Date published

2025-07-16

## Recorded date published

2025-12

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Strength-limiting defects evolved from heterogeneities during the sintering
    of high-purity submicron alumina powder
  title_type: original
  lang: en

## Description

- description: The strength-limiting defects in ceramics evolve from large inhomogeneities,
    such as agglomerates and aggregates, in the starting powder during sintering.
    The synchrotron X-ray multiscale tomography (micro-CT and nano-CT) was used to
    observe how defects evolve from transition alumina aggregates contained in a high-purity
    submicron α-alumina powder during the sintering. Complex pores, consisting of
    mutually interconnected pore channels, developed from aggregates through transformation,
    particle rearrangements, and particle coarsening due to surface diffusion. Under
    the constraint of the matrix, a circumferential crack was formed partly along
    the interface between the complex pore and the matrix. The fractography revealed
    that the fracture origins were complex pores on the fracture surface of bending
    specimens. The fracture mechanical analysis was conducted to show that both the
    elliptical crack model and the pore-crack model can explain the mechanical strength.
  description_type: abstract
  lang: eng

## Creator

- 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: Tsukasa Shimizugawa
  role: author
  organization: Yokohama National University
- name: Shingo Ozaki
  role: author
  organization: Yokohama National University
- name: Toshio Osada
  role: author
  orcid: https://orcid.org/0000-0003-1539-9264
  organization: National Institute for Materials Science
  department: Research Center for Structural Materials/Materials Manufacturing Field/High-Reliability
    Heat-Resistant Materials Group
- name: Shingo Machida
  role: author
  organization: JFCC
- name: Yutaro Arai
  role: author
  organization: Tokyo university of science
- name: Ryo Inoue
  role: author
  organization: Tokyo university of science
- 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
- name: Yuki Sada
  role: author
  organization: Japan Synchrotron Radiation Research Institute (JASRI)
- name: Masayuki Uesugi
  role: author
  organization: Japan Synchrotron Radiation Research Institute (JASRI)
- name: Akihisa Takeuchi
  role: author
  organization: Japan Synchrotron Radiation Research Institute (JASRI)
- 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

## Contact agent



## Publisher

organization: Elsevier B.V.

## Managing organization



## Keyword

- subject: Sintering
  schema: not_defined
- subject: Synchrotron X-ray tomography
  schema: not_defined
- subject: Microstructure
  schema: not_defined
- subject: Defects
  schema: not_defined
- subject: Fracture
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  issn: '09552219'
  volume: '45'
  issue: '16'
  article_number: '117679'

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## Specimen



## Chemical composition



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## Fileset

- id: 889d847f-0cb2-4a39-bd2a-d4cd522931b4
  filename: 1-s2.0-S095522192500500X-main+(1)-圧縮.pdf
  content_type: application/pdf
  size: 2309991
  md5: 645f42a1e928d707d8d8d24da506ec3a

## Thumbnail

fileset_id: 889d847f-0cb2-4a39-bd2a-d4cd522931b4
filename: 1-s2.0-S095522192500500X-main+(1)-圧縮.pdf