Cation transport in yttria stabilized cubic zirconia: 96Zr tracer diffusion in (ZrxY1–x)O2–x/2 single crystals with 0.15⩽x⩽0.48

Atomistic study of segregation and diffusion of yttrium and calcium cations near electrolyte surfaces in solid oxide fuel cells

“…4(a) shows that the average energy barriers remain almost constant from the third layer to the bulk (Zr × (∼4.8 eV) > Y Zr (∼4.3 eV) > Ca Zr (∼2.5 eV)). The obtained activation energy for bulk is sufficiently comparable to the experimental value for Zr diffusion in 10 mol% YSZ (4.6 eV [49]) estimated using secondary ion mass spectroscopy. Clearly, the barriers involving the first and (Fig.…”

Creep behaviour of porous SOFC electrodes: Measurement and application to Ni-8YSZ cermets

“…In the range of the considered operating conditions, creep of 8YSZ is controlled by the migration of Zr 4+ cations which are to the slower diffusing specie in the compound. [35][36][37][38] The uni-axial high-temperature plastic strain rate dε pl 8YSZ /dt is a combination of Coble and Nabarro-Herring creep processes 39 :…”

Diffusion of niobium in yttria-stabilized zirconia and in titania-doped yttria-stabilized zirconia polycrystalline materials

“…Since that time some new papers have appeared. [4][5][6][7][8][9][10][11][12][13] investigated diffusion of Zr and Y in YSZ monocrystal and diffusion of Zr and Ca in calcia-stabilized zirconia (CSZ) single crystal with different content of stabilizers. Simultaneous bulk diffusion of lanthanide elements in monocrystals was studied by Weber et al 8 for YSZ, by Taylor et al 9 for YSZ, CSZ and scandia-stabilized zirconia (ScSZ) and by Kilo et al 10 for CSZ and YSZ.…”

“…Both, grain boundary and bulk diffusion were studied in the work of Bak et al 12 for Mg migration in polycrystalline YSZ and in the work of Taylor et al 13 During last few years the secondary ion mass spectrometry (SIMS) technique became a major tool for investigations of diffusion in zirconia ceramics. [1][2][3][4][5][6][8][9][10][11][12][13] This method has the possibility to analyze isotopes that is useful for studying the selfdiffusion by isotope labeling. Moreover, diffusion profiles can be determined precisely at very short distances what is important for observing the migration of slow cations in zirconia.…”