Abstract 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.

中文翻译：

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电场辅助烧结多晶氧化铈期间的粘性泊松比、体积和剪切粘度

摘要 在相同条件下，即保持样品温度恒定，通过不连续烧结锻造，在无交流电场和有交流电场的情况下，测量单轴粘滞泊松比、体积粘度和剪切粘度。这种预防措施可以排除任何宏观焦耳热。主要发现是： (i) 粘性泊松比随着相对密度的增加而增加，有无电场；(ii) 粘性泊松比随着电场的存在而增加；(iii) 粘性泊松比的变化可能与剪切粘度的明显降低相关，这可归因于电场下晶界更容易滑动。