Methanol electro-oxidation on PtRu/C gas diffusion electrodes

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 20 KB
• Volume: 2003
• Category: Article
• ISSN: 1464-2859
• DOI: 10.1016/s1464-2859(03)00140-8

✦ Synopsis

Fracture energy and crack growth in surface-treated YSZ for SOFCs

The SOFC electrolyte, yttria-stabilized zirconia (YSZ), was coated and co-sintered with different electrode coatings. Two energy release rates -for crack initiation and arrest -characterized the cracking behavior. A 30-50% improvement in fracture resistance compared with untreated YSZ was due to coating effects. Interdiffusion of Mn and Ni from coatings into the YSZ lattice during sintering appears to introduce residual stresses, for improved fracture energy. Crack bridging appears to contribute to improved fracture toughness in surface-treated YSZ. A.N. Kumar and B.F.