The influence of (LaSr)CoO{sub 3} coatings on the electrical resistance of Ni-20Cr alloys in high temperature oxidizing atmosphere
- NKK Corp., Kawasaki (Japan). Engineering Research Center
- Tokyo Inst. of Technology (Japan). Dept. of Metallurgical Engineering
Ni-20Cr alloys coated with (LaSr)CoO{sub 3} maintained their electrical resistance as low as 5m {Omega} cm{sup 2} for 12,000 h at 1,273 K in air, and showed their applicability for the separator of solid oxide fuel cell (SOFC). Energy dispersive X-ray analysis of the fracture surface of the coated Ni-20Cr alloys revealed that Sr diffused into the Cr{sub 2}O{sub 3} scale and precipitated as oxides in the Sr-Cr-O system. X-ray diffraction profile of the outer portion of the Cr{sub 2}O{sub 3} scale adjacent to the coating layer indicated SrCr{sub 2}O{sub 4} and Cr{sub 2}O{sub 3}. Electron diffraction and Energy dispersive X-ray analysis of the oxide particles inside the scale close to the alloy/scale interface indicated that the oxide is a rhombohedral crystal with the unit-cell dimension of a = 11.28, c = 36.44 and the atomic ratio of Sr/Cr = 3.165/2.
- OSTI ID:
- 242540
- Report Number(s):
- CONF-950683-; ISBN 1-56677-095-5; TRN: IM9626%%368
- Resource Relation:
- Conference: 4. international symposium on solid oxide fuel cells, Yokohama (Japan), 18-23 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the fourth international symposium on solid oxide fuel cells (SOFC-IV). Proceedings Volume 95-1; Dokiya, M. [ed.] [National Inst. of Materials and Chemical Research, Tsukuba, Ibaraki (Japan)]; Yamamoto, O. [ed.] [Mie Univ., Tsu, Mie (Japan)]; Tagawa, H. [ed.] [Yokohama National Univ., Yokohama, Kanagawa (Japan)]; Singhal, S.C. [ed.] [Westinghouse Electric Corp., Pittsburgh, PA (United States)]; PB: 1188 p.
- Country of Publication:
- United States
- Language:
- English
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