Processing, Phase Stability and Mechanical Properties of 10 mol% Sc2O3 - 1 mol% CeO2-ZrO2 CERAMICS

Microcracking in electron beam deposited scandia-stabilised zirconia electrolyte

“…First of all, this restriction concerns the experimental point with minimal average size of microcrack. Thus, it follows from (19) that, other conditions being equal, cannot exceed a given value u ; in other words, we have a boundary for parameter : < u . Shown in Fig.…”

“…As a rule, the calculation of microcracking parameters using (18) and (19) gives the dependencies of stress and strain energy density on microcrack density having maxima and the non-zero strain energy density corresponding to zero microcrack density. This means that a certain value of strain energy density q 0 is necessary for initiating microcracks.…”

“…In this case all points of the curve c = f(l*) have no dependence on . Next, each of the experimentally determined average microcrack sizes can be considered as being in correspondence with a given parameter l* which can be found from (19) prescribing some specific value to . The position of a point corresponding to maximum strain energy density (i.e.…”

“…The composition 10 mol.% Sc 2 O 3 -1 mol.% CeO 2 -89 mol.% ZrO 2 (10Sc1CeSZ) was found to be optimal for the electrolyte and as a constituent of the anode [19,20]. Powders manufactured at the Institute for Problems of Materials Science were used for half-cell production due to the greater sintering ability and electric conductivity compared with powders from other manufacturers.…”

“…SOFC anodes were fabricated with a traditional ceramic route [19]. Mixtures of 40 wt.% NiO and 60 wt.% 10Sc1CeSZ were ballmilled with alcohol for 24 h. Polyvinyl alcohol was used as pore-creating agent.…”