# High-Entropy Ti, Zr, Hf, Ta Multiphase Diboride with Deformation Resistance up to 2000 °C

https://mdr.nims.go.jp/datasets/0c0f349e-0e3e-4a3b-8b07-3db043a2f301

## File

- [adem.202402723_R1.pdf](https://mdr.nims.go.jp/filesets/04720aec-fbd3-43e0-9279-b89790f628b9/download) ([Detail](https://mdr.nims.go.jp/filesets/04720aec-fbd3-43e0-9279-b89790f628b9.md))
- [Art HEB AdvEngMater cor v Jan 28 final clean.docx](https://mdr.nims.go.jp/filesets/c99ce2c4-20fe-4583-ba71-9434a515df75/download) ([Detail](https://mdr.nims.go.jp/filesets/c99ce2c4-20fe-4583-ba71-9434a515df75.md))

## Id

0c0f349e-0e3e-4a3b-8b07-3db043a2f301

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-01-29T01:45:16.882774Z

## Updated at

2025-02-23T13:45:45.741968Z

## Published at

2025-02-23T13:45:47.081541Z

## Doi

https://doi.org/10.48505/nims.5325

## First published url

https://doi.org/10.1002/adem.202402723

## Date published

2025-02-15

## Recorded date published

2025-5

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: High-Entropy Ti, Zr, Hf, Ta Multiphase Diboride with Deformation Resistance
    up to 2000 °C
  title_type: original
  lang: en

## Description

- description: 'A multiphase high entropy diboride (Ti0.25Ta0.25Hf0.25Zr0.25)B2 was
    obtained by spark plasma sintering from a mixture of single-metal diborides. The
    as-prepared material at the microscale can be defined as a composite where grains
    of a Ta-rich/Ti-poor complex diboride phase are the reinforcement and grains of
    Ta-poor/Ti-rich complex diboride are the matrix. However, at the nanoscale, the
    grains are heterogeneous, composed of regions with a multitude of complex diboride
    compositions. The interface between nano regions is compositionally graded and
    has an irregular shape. The four-metal diboride shows a deformation-resistant
    mechanism under bending load. 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. At 2000 °C, observation
    of dislocations propagating from one compositional nano region to another and
    with a different density suggests dislocation contribution, first of all, to plasticity.
    The peculiar heterogeneity of this material at nano and micro scales is considered
    the reason for the remarkable mechanical response to bending load at different
    temperatures.  '
  description_type: abstract
  lang: eng

## Creator

- name: BADICA Petre
  role: author
  organization: National Institute of Materials Physics
- name: GRIGOROSKUTA Mihai Alexandru
  role: author
  organization: National Institute of Materials Physics
- name: KUNCSER Andrei
  role: author
  organization: National Institute of Materials Physics
- 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
  ror: https://ror.org/026v1ze26

## Contact agent



## Publisher

organization: Wiley-Blackwell

## Managing organization



## Keyword

- subject: high entropy diboride
  schema: not_defined
- subject: high temperature bending test
  schema: not_defined
- subject: microstructure
  schema: not_defined
- subject: plasticity
  schema: not_defined
- subject: spark plasma sintering
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: ADVANCED ENGINEERING MATERIALS
  issn: '15272648'
  article_number: '2402723'

## Conference



## Related item



## Funding

- identifier: KCB101 Enhancement of ultra-high temperature ceramics by amorphous phase
    formation
  funder_name: Japan Society for the Promotion of Science
- identifier: AB3080 Polycrystalline Optical Materials Fundamental research for creating
    innovative optical materials
  funder_name: NIMS

## 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: 04720aec-fbd3-43e0-9279-b89790f628b9
  filename: adem.202402723_R1.pdf
  content_type: application/pdf
  size: 3659623
  md5: 8cf906206061be96875143d89e1e33c2
- id: c99ce2c4-20fe-4583-ba71-9434a515df75
  filename: Art HEB AdvEngMater cor v Jan 28 final clean.docx
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  size: 9108624
  md5: 9299c0a34a0bf389e07570c2fa8c3f5d

## Thumbnail

fileset_id: 04720aec-fbd3-43e0-9279-b89790f628b9
filename: adem.202402723_R1.pdf