# Deformation-resistant carbides and borides with superior hardness, toughness, and flexural strength up to 2000°C

https://mdr.nims.go.jp/datasets/955f40a7-96e6-4d04-aed9-ed5b8ea6ea72

## File

- [G0139-2N07.pdf](https://mdr.nims.go.jp/filesets/50f25a02-b114-4c98-884f-a62428264e9f/download) ([Detail](https://mdr.nims.go.jp/filesets/50f25a02-b114-4c98-884f-a62428264e9f.md))

## Id

955f40a7-96e6-4d04-aed9-ed5b8ea6ea72

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-11-15T01:18:10.231479Z

## Updated at

2024-11-21T07:35:52.707116Z

## Published at

2024-11-21T07:35:52.769696Z

## Doi

https://doi.org/10.48505/nims.4982

## First published url



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## Resource type

conference_presentation

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Deformation-resistant carbides and borides with superior hardness, toughness,
    and flexural strength up to 2000°C
  title_type: original
  lang: en

## Description

- description: "New deformation resistance ceramics can be used for engine and vehicle
    protection, aerospace components, plasma-facing ceramic parts, gas turbine operation,
    and other applications that require a balance of strength, toughness, and hardness.
    \r\nI will discuss the resistance to ultrahigh-temperature deformation of boron
    carbide, Ta0.2Hf0.8C, TiB2-B4C, Zr-Ta multi-boride, Ta monoboride, and diboride.
    The idea behind the deformation-resistant ceramics (DRC) concept is that during
    densification, a novel or solid solution phase is formed that is more difficult
    to densify or deform. As a result, forming some of these phases is advisable only
    at elevated temperatures in situ during the densification process. In our experience,
    once the DRC phase is formed, it should require a temperature higher or equal
    to that of densification temperature to activate mass transport, thus yielding
    activation of plasticity at/above 2000°C.\r\nThe mechanism of ultra-high temperature
    flexure & strain-driven amorphization in polycrystalline B4C has been analyzed.
    With RT to 1800 °C mean strength of 650 MPa, B4C exhibits ultrahigh flexural strength
    far exceeding 1000 MPa, accompanied by a change in the deformation mechanism from
    brittle fracture to plastic deformation at 2000 °C. Depending on the loading rate,
    B4C ceramic showed 1000 - 8400 MPa strength with a plastic stress-strain curve.
    Even deformation in an elastic manner at 25 mm/min resulted in a strength of 675
    MPa, confirming its deformation resistivity."
  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

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## Keyword

- subject: Deformation resistivity
  schema: not_defined
- subject: carbides
  schema: not_defined
- subject: borides
  schema: not_defined
- subject: UHTC
  schema: not_defined

## Rights

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

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## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: The 37th Fall Meeting of The Ceramic Society of Japan (日本セラミックス協会 第37回秋季シンポジウム)
start_date: 2024-09-10
end_date: 2024-09-12
identifier: https://fall37.ceramic.or.jp/

## Related item



## Funding

- identifier: KCB101
  funder_name: NIMS, JSPS (KAKENHI 24K08035)
  description: 非晶質相形成による超高温セラミックスの高
- identifier: AB3080
  funder_name: NIMS
  description: "多結晶光学材料\tResearch toward Innovative Optical Materials"

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## Specimen



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## Fileset

- id: 50f25a02-b114-4c98-884f-a62428264e9f
  filename: G0139-2N07.pdf
  content_type: application/pdf
  size: 269698
  md5: 01ac1fb41cd425073af2ff3eb4592851

## Thumbnail

fileset_id: 50f25a02-b114-4c98-884f-a62428264e9f
filename: G0139-2N07.pdf