# Deformation-Resistant Transition Metal Diborides with Superior Mechanical Properties

https://mdr.nims.go.jp/datasets/7ef9aa11-195c-4fef-a055-1e7007d42f13

## Files

- [Oct 7 HighMatTech_VO.pdf](https://mdr.nims.go.jp/filesets/f45e6375-f657-4db1-82f1-c695b52dcd34/download) ([Detail](https://mdr.nims.go.jp/filesets/f45e6375-f657-4db1-82f1-c695b52dcd34.md))

## Id

7ef9aa11-195c-4fef-a055-1e7007d42f13

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-03-18T07:21:30.462088Z

## Updated at

2026-03-20T23:30:22.880750Z

## Published at

2026-03-20T12:43:09.229036Z

## Doi

https://doi.org/10.48505/nims.6227

## First published url



## Date published



## Recorded date published



## Resource type

conference_presentation

## Manuscript type

na

## Collection



## Title

- title: Deformation-Resistant Transition Metal Diborides with Superior Mechanical
    Properties
  title_type: original
  lang: en

## Description

- description: "The demand for new UHTC is rising, particularly for those that are
    multipurpose, deformation-resistant, and offer specialized protection for engines
    and vehicles. \r\nZr-Ta multiboride with artificially created repetitive hierarchical
    superstructure was formed via RD-SPS. Ta3B4 forms a chain-like mesh that entraps
    the ZrB2, ZrB, TaB, and (Zr, Ta)B2 solid solution multiboride ceramic, exhibiting
    ultra-hardness of 28GPa at 98N and 22GPa at 196N and the flexural strength of
    400MPa up to 2000 °C. A multiphase high-entropy (Ti, Ta, Hf, Zr)B2 at the microscale
    was defined as a composite where grains of a Ta-rich/Ti-poor complex diboride
    phase act as reinforcement and grains of Ta-poor/Ti-rich complex diboride are
    the matrix. At the nanoscale, the grains were heterogeneous, composed of regions
    with a multitude of complex diboride compositions. A strengthening process is
    active, increasing the room temperature bending strength (326 MPa) by 50 % at
    1800 °C (488 MPa). A ductile behavior with a deformation strain of 7.5 % is observed
    at 2000 °C, while bending strength (407 MPa) is 25 % above the value at room
    temperature. The peculiar heterogeneity of this material at nano and micro scales
    was considered the reason for the remarkable mechanical response to bending load
    at different temperatures.  "
  description_type: abstract
  lang: eng

## Creator

- name: VASYLKIV Oleg
  role: author
  orcid: https://orcid.org/0000-0002-5041-6130
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Polycrystalline Optical Material Group
- name: MORITA Koji
  role: author
  orcid: https://orcid.org/0000-0001-6040-7054
  organization: National Institute for Materials Science
  department: Research Center for Electronic and Optical Materials/Optical Materials
    Field/Polycrystalline Optical Material Group
- name: Mihai-Alexandru Grigoroscuta
  role: author
  organization: National Institute for Materials Physics,
- name: Andrei Kuncser
  role: author
  organization: National Institute for Materials Physics,
- name: Petre Badica
  role: author
  organization: National Institute for Materials Physics,

## Contact agent



## Publisher



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## Keyword

- subject: DRC
  schema: not_defined
- subject: UHTC
  schema: not_defined
- subject: Transition-metal carbides
  schema: not_defined
- subject: Transition-metal borides
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: The 38th Fall Meeting The Ceramic Society of Japan
start_date: 2025-09-17
end_date: 2025-09-19
identifier: https://fall38.ceramic.or.jp/home

## Related item



## Funding

- identifier: AB3080
  funder_name: NIMS
- identifier: KCB101
  funder_name: JSPS
  description: JSPS KAKENHI Grants-in-Aid for Scientific Research 24K08035

## 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



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## Custom property



## Fileset

- id: f45e6375-f657-4db1-82f1-c695b52dcd34
  filename: Oct 7 HighMatTech_VO.pdf
  content_type: application/pdf
  size: 7995945
  md5: 373dabdfeba8820653e0e20aca3c2c9d

## Thumbnail

fileset_id: f45e6375-f657-4db1-82f1-c695b52dcd34
filename: Oct 7 HighMatTech_VO.pdf