Ni-YSZ cermets are a prevalent material used for solid oxide fuel cells. However, the cermet degrades upon redox cycling. The degradation is related to microstructural changes, but knowledge of the mechanisms has been limited. DC conductivity measurements were performed on cermets and cermets, where the Ni component was removed, before, during and after redox cycling the cermet. The cermet conductivity degraded over time due to sintering of the nickel phase. Following oxidizing events, the conductivity of the cermets improved, whereas the conductivity of the YSZ phase decreased. A model of the redox degradation mechanism was established based on the measurements.
|Title of host publication||Proceedings of Materials Science and Technology 2006 Meeting|
|Number of pages||23|
|Publication status||Published - 2006|
|Event||Materials science and technology (MS&T) 2006: Materials and systems - Cincinnati, OH, United States|
Duration: 15 Oct 2006 → 19 Oct 2006
|Conference||Materials science and technology (MS&T) 2006: Materials and systems|
|Period||15/10/2006 → 19/10/2006|