# Allotropic strengthening and in situ phase transformations during ultra-high-temperature flexure of bulk tantalum nitride

https://mdr.nims.go.jp/datasets/b25451c3-1d85-438c-ba98-aa333a0217ad

## File

- [MSEA-D-21-03137-R2 1.pdf](https://mdr.nims.go.jp/filesets/fc0faa4f-8004-47bd-b2bb-62a77a6d2c22/download) ([Detail](https://mdr.nims.go.jp/filesets/fc0faa4f-8004-47bd-b2bb-62a77a6d2c22.md))

## Id

b25451c3-1d85-438c-ba98-aa333a0217ad

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-14T06:32:04.316118Z

## Updated at

2024-11-19T07:30:09.993448Z

## Published at

2024-11-19T07:30:11.103857Z

## Doi

https://doi.org/10.48505/nims.4984

## First published url

https://doi.org/10.1016/j.msea.2021.141954

## Date published

2021-08-20

## Recorded date published

2021-10

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Allotropic strengthening and in situ phase transformations during ultra-high-temperature
    flexure of bulk tantalum nitride
  title_type: original
  lang: en

## Description

- description: The present study deals with mechanical properties of the bulk tantalum
    ceramics at elevated temperatures up to 2000 °C. In situ phase transformation
    and change in the grain size were observed during high temperature flexural tests
    performed on tantalum nitride bulks consolidated by spark plasma sintering. This
    study, for the first time, shows that tantalum nitride with cubic structure is
    the main phase at temperatures between 25 °C and 2000 °C, while previous studies
    suggested it should be hexagonal TaN. Cubic TaN phases with lattice parameters
    of a = 4.338 Å and a = 4.44 Å were observed below 1600 °C and above 1600 °C, respectively.
    The possibility of the formation of multiple TaN phases during the flexural tests
    significantly increases the high-temperature strength as values of greater than
    500 MPa were observed at 1600 °C. This strength level is typical for the bulk
    TaC at room temperature. We anticipate that the approach presented in this study
    would allow to clarify and obtain additional information about transition metal
    – nitrogen phase diagrams.
  description_type: abstract
  lang: und

## Creator

- name: D. Demirskyi
  role: author
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: O. Vasylkiv
  role: author
  orcid: https://orcid.org/0000-0002-5041-6130
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: K. Yoshimi
  role: author

## Contact agent



## Publisher

organization: Elsevier BV

## Managing organization



## Keyword

- subject: binary phase diagram
  schema: not_defined
- subject: flexural strength
  schema: not_defined
- subject: toughness
  schema: not_defined
- subject: high-temperature materials
  schema: not_defined

## Rights

- description: "© 2021. This manuscript version is made available under the CC-BY-NC-ND
    4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/"
  identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: 'Materials Science and Engineering: A'
  issn: '09215093'
  volume: '826'
  article_number: '141954'

## Conference



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## Funding

- identifier: PA5180
  funder_name: National Institute for Materials Science
  description: セラミックスプロセッシング
- identifier: PA3030
  funder_name: National Institute for Materials Science
  description: "粉体・セラミックス\t結晶・界面の階層的構造制御による機能顕在化のための研究"

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## Fileset

- id: fc0faa4f-8004-47bd-b2bb-62a77a6d2c22
  filename: MSEA-D-21-03137-R2 1.pdf
  content_type: application/pdf
  size: 5584506
  md5: '09334168bfe3642b50fa9002cd6740c1'

## Thumbnail

fileset_id: fc0faa4f-8004-47bd-b2bb-62a77a6d2c22
filename: MSEA-D-21-03137-R2 1.pdf