Viscous Poisson's ratio, bulk and shear viscosity during electrical field assisted sintering of polycrystalline ceria
Viscous Poisson's ratio, bulk and shear viscosity during electrical field assisted sintering of polycrystalline ceria
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DOI：
10.1016/j.scriptamat.2019.11.043
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发表时间：
2020-03
影响因子：
6
通讯作者：
C. Cao;R. Mücke;F. Wakai;O. Guillon
中科院分区：
文献类型：
--
作者：
C. Cao;R. Mücke;F. Wakai;O. Guillon
在相同条件下，即保持样品温度恒定的情况下，用不连续烧结锻造方法测量了单轴粘性泊松比、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加热。主要结果是：(1)粘性泊松比随相对密度的增加而增加，无论有无电场作用；(2)粘性泊松比随电场的存在而增加；(3)粘性泊松比的变化与剪切粘度的明显降低有关，这可归因于在电场作用下晶界更容易滑动。
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.