Fracture properties of nickel-based anodes for solid oxide fuel cells

Influence of temperature and atmosphere on the strength and elastic modulus of solid oxide fuel cell anode supports

“…[19,20]. Hashida et al [21,22] also showed that plastic deformations occurred before fracture in their Ni-YSZ cermet given a sufficient slow loading rate.…”

Influence of porosity on mechanical properties of tetragonal stabilized zirconia

“…They must also withstand the mechanical stresses arising from both mechanical loading and thermal gradients during operation. The mechanical properties of the NiO-YSZ and Ni-YSZ cermets after reduction have been extensively studied in literature [6][7][8][9][10][11][12]. Radovic et al [6] used the ring-on-ring method and fitted the Weibull strength-porosity data using a power law (such as eq.…”

“…Rising fracture resistance with crack extension (R -curve behaviour) is a well-known behaviour for dense partially stabilized zirconia (PSZ), [12,[18][19][20][21][22][23]. R-curve behaviour has been attributed to crack shielding 4 produced mainly by three different toughening mechanisms: transformation toughening, transformation induced microcrack toughening, and crack deflection toughening [24].…”

“…Subcritical crack growth (SCCG) is another important phenomenon observed in YSZ well documented in literature [3,6,[10][11][12]26]. Generally, in truly brittle ceramic materials, crack growth occurs at a velocity that is on the order of magnitude of the speed of sound (fast fracture) after the applied energy release rate reaches a critical value ( ).…”

Microstructure and mechanical properties of Ni/10mol% Sc2O3–1mol% CeO2–ZrO2 cermet anode for solid oxide fuel cells

“…The mechanical properties of Ni/YSZ anodes have been reported in several publications. [2][3][4][5][6] Recently, scandia and ceria stabilized zirconia (SCSZ) ceramics emerged as new, promising electrolyte materials exhibiting much higher ionic conductivity at a lower temperature range in contrast to traditional YSZ electrolytes. 7,8 As SCSZ electrolytes become a more feasible option in single cells, the Ni/YSZ cermets may also need to be modified to replace YSZ with a SCSZ matrix.…”