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Analysis of uniaxial viscosity and activation energy of deformation for 3Y-TZP by bending creep test.

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Title: Analysis of uniaxial viscosity and activation energy of deformation for 3Y-TZP by bending creep test.
Authors: Liu, Chao1 (AUTHOR) c.liu@iwm.rwth-aachen.de, Herrmann, Mathias2 (AUTHOR), Deng, Yuanbin1 (AUTHOR), Kaletsch, Anke1 (AUTHOR), Broeckmann, Christoph1 (AUTHOR)
Source: Ceramics International. Jul2023:Part A, Vol. 49 Issue 14, p22806-22815. 10p.
Subjects: Creep (Materials), Activation energy, Bend testing, Viscosity, Kirkendall effect, Specific gravity, Grain size
Abstract: The uniaxial viscosity is an important material property that has to be determined in order to understand the densification of a material during the sintering process. It depends simultaneously on temperature, relative density and grain size which complicates its determination. To determine its dependence on these three factors, bending creep tests are performed on pre-sintered 3Y-TZP specimens with different relative densities and grain sizes up to the corresponding pre-sintering temperatures. The uniaxial viscosity of 3Y-TZP specimens is calculated after obtaining the deflection rates. It is found that the uniaxial viscosity decreases with temperature according to the Arrhenius equation. In addition, the tetragonal to cubic phase transformation at temperature above 1300 °C leads to a decrease of the activation energy. Apart from that, the contribution of densification and grain growth to the increase of the uniaxial viscosity is quantitatively determined. When grain boundary diffusion dominates, the contribution of grain growth is up to 1.8 times that of densification to the uniaxial viscosity. Furthermore, it is found that Rahaman's model best fits the normalized uniaxial viscosity. At the end, an evolution profile of the uniaxial viscosity for polycrystalline materials during the sintering process is proposed to facilitate the analysis of the sintering shrinkage rate. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 164181225
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Analysis of uniaxial viscosity and activation energy of deformation for 3Y-TZP by bending creep test.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Chao%22">Liu, Chao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> c.liu@iwm.rwth-aachen.de</i><br /><searchLink fieldCode="AR" term="%22Herrmann%2C+Mathias%22">Herrmann, Mathias</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deng%2C+Yuanbin%22">Deng, Yuanbin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kaletsch%2C+Anke%22">Kaletsch, Anke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Broeckmann%2C+Christoph%22">Broeckmann, Christoph</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Jul2023:Part A, Vol. 49 Issue 14, p22806-22815. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Creep+%28Materials%29%22">Creep (Materials)</searchLink><br /><searchLink fieldCode="DE" term="%22Activation+energy%22">Activation energy</searchLink><br /><searchLink fieldCode="DE" term="%22Bend+testing%22">Bend testing</searchLink><br /><searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink><br /><searchLink fieldCode="DE" term="%22Kirkendall+effect%22">Kirkendall effect</searchLink><br /><searchLink fieldCode="DE" term="%22Specific+gravity%22">Specific gravity</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+size%22">Grain size</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The uniaxial viscosity is an important material property that has to be determined in order to understand the densification of a material during the sintering process. It depends simultaneously on temperature, relative density and grain size which complicates its determination. To determine its dependence on these three factors, bending creep tests are performed on pre-sintered 3Y-TZP specimens with different relative densities and grain sizes up to the corresponding pre-sintering temperatures. The uniaxial viscosity of 3Y-TZP specimens is calculated after obtaining the deflection rates. It is found that the uniaxial viscosity decreases with temperature according to the Arrhenius equation. In addition, the tetragonal to cubic phase transformation at temperature above 1300 °C leads to a decrease of the activation energy. Apart from that, the contribution of densification and grain growth to the increase of the uniaxial viscosity is quantitatively determined. When grain boundary diffusion dominates, the contribution of grain growth is up to 1.8 times that of densification to the uniaxial viscosity. Furthermore, it is found that Rahaman's model best fits the normalized uniaxial viscosity. At the end, an evolution profile of the uniaxial viscosity for polycrystalline materials during the sintering process is proposed to facilitate the analysis of the sintering shrinkage rate. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ceramint.2023.04.103
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 22806
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      – SubjectFull: Creep (Materials)
        Type: general
      – SubjectFull: Activation energy
        Type: general
      – SubjectFull: Bend testing
        Type: general
      – SubjectFull: Viscosity
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      – SubjectFull: Kirkendall effect
        Type: general
      – SubjectFull: Specific gravity
        Type: general
      – SubjectFull: Grain size
        Type: general
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      – TitleFull: Analysis of uniaxial viscosity and activation energy of deformation for 3Y-TZP by bending creep test.
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            NameFull: Liu, Chao
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              Text: Jul2023:Part A
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              Y: 2023
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