| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide interconnecting structures for a solid oxide fuel cell with an austenite phase formed on a surface. <P>SOLUTION: A diffusion barrier layer of an austenite phase is formed on the surface 23 of the interconnecting structures 22, 33 formed of ferritic stainless steel including chromium. The method includes a step of coating an austenite phase-stabilizer on the interconnect surface 23, and then heating the coated surface. The heat treatment transforms a microstructure of the interconnectingf surface region from a substantially ferritic body-centered cubic (BCC) phase to a substantially austenitic face-centered cubic (FCC) phase. A diffusion rate of chromium through the FCC phase is relatively low. Thus, formation of a thick chromium oxide layer can be minimized, leading to a better electricity generation performance. <P>COPYRIGHT: (C)2010,JPO&INPIT |
