期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 32, 期 8, 页码 1473-1479出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2011.12.022
关键词
Sintering; Electron microscopy; Microstructure; Impedance; ZrO2
资金
- French ANR [ANR-2010-VPTT006-04]
The basic mechanisms of the current activated/assisted sintering (ECAS) of yttrium-doped zirconia's currently is a controversial issue. To gather more experimental data, we performed two-electrode-experiments (2EE) on staked spherical granules of cubic yttria-stabilised zirconia (YSZ) of diameters ranging from 10 to 100 mu m. The observations were focused on the initial welding stage, under currents smaller than 4 A cm(-2). The impedance spectroscopy appears to be a sensitive technique to detect the very early welding stage. FEG-SEM analysis reveals protrusion formations at the granule surfaces which are probable intermediate microstructures in the neck formation. (C) 2011 Elsevier Ltd. All rights reserved.
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