Charactaristics of Damage and Fracture Process of Solid Oxide Fuel Cells under Simulated Operating Conditions by Using Ae Method

The purpose of present research is to estimate the damage of solid oxide fuel cell (SOFC) by using a new factor of acoustic emission (AE) during loading test. Acoustic emission signals and fracture processes were monitored by AE measurement system in real time during the test. In the investigation of fracture process with AE amplitude distributions, high-amplitude, middleamplitude and low-amplitude signals correspond to vertical cracking, delamination in the cathode, and vertical cracking in the elctrolyte, respectively. It was demonstrated that the AE method enabled us to detect these fracture processes and to determine the condition for the onset of the damage in a single cell.