Viscous Poisson's ratio, bulk and shear viscosity during electrical field assisted sintering of polycrystalline ceria

Uniaxial viscous Poisson's ratio, bulk and shear viscosities were measured by discontinuous sinter-forging without and with alternating current electric fields under the same conditions, i.e. by keeping the sample temperature constant. This precaution enables the exclusion of any macroscopic Jo...

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Vydané v:Scripta materialia Ročník 178; s. 240 - 243
Hlavní autori: Cao, Chen, Mücke, Robert, Wakai, Fumihiro, Guillon, Olivier
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Elsevier Ltd 01.03.2020
Predmet:
Bulk viscosity
Ceria
Electric field assisted sintering
Shear viscosity
Viscous Poisson's ratio
Viscous Poisson's ratio
Shear viscosity
Electric field assisted sintering
Bulk viscosity
Ceria
ISSN:1359-6462, 1872-8456
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Shrnutí:Uniaxial viscous Poisson's ratio, bulk and shear viscosities were measured by discontinuous sinter-forging without and with alternating current electric fields under the same conditions, i.e. by keeping the sample temperature constant. This precaution enables the exclusion of any macroscopic Joule heating. Major findings are: (i) viscous Poisson's ratio increases with the relative density, with and without electric field; (ii) viscous Poisson's ratio increases with the presence of electrical fields; (iii) changes in the viscous Poisson's ratio can be correlated to a clear decrease in shear viscosity, which can be attributed to an easier grain boundary sliding under electric field. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2019.11.043