Alloys with thermal expansion matching to electrolyte materials for solid oxide fuel cells
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Yu. L. Rodionov
Abstract
The thermal expansion of the Fe-(30–40) wt.% Ni-(20–30) wt.% Co-(6–10) wt.% Cr alloys matches closely with yttria-stabilized zirconia, often used as electrolyte in solid oxide fuel cells. At the best fit, the difference in the thermal expansion coefficients does not exceed 0.7·10–6 K–1 in the range from room temperature to ~500°C. Significant mismatch begins above 600°C, but the internal stresses this mismatch might cause in the metallic component of the metal/ceramics junctions remain significantly below the yield strength up to the temperatures exceeding the starting temperature of relaxation processes by ~180–240°C. The above alloys are phase stable so that no phase transformations are expected at the cell operating temperatures. Their resistance to corrosion attacks in cathodic and anodic environments is comparable to ferritic steels containing 25–30% chromium. The transfer of chromium from the alloys containing 34% Ni, 30% Co and 6–14% Cr into the La0.6Sr0.4MnO4 cathode material occurs after 400–600 h heating at 900°C. Chromium penetrated to a depth of 20 μm at most.
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© 2010, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Basic
- Thermodynamic modeling of the Pt–Zr system
- Experimental investigation and thermodynamic prediction of the Ga–Sb–Sn phase equilibria
- Calculation of the viscosity of the liquid ternary Ag–Au–Sn system
- Thermophysical properties of liquid tin–bismuth alloys
- A comparative AFM study of carbon alloyed Mo–Se–C and W–S–C films for tribological applications
- Luminescence of Fe-substituted ZnWO4 powders synthesized by aqueous solution reaction
- Electromagnetic radiation during plastic deformation under unrestricted quasi-static compression in metals and alloys
- Applied
- Microstructure and mechanical properties of Fe3Al–TiC composites
- Study of wear behaviour of ductile iron subjected to two step austempering
- Effect of annealing on formability and crystallographic textures of aluminium 5052 alloy sheets
- The use of fly ash and basaltic pumice as additives in the productionof clay fired brick in Turkey
- Insulation properties of bricks made with cotton and textile ash wastes
- Effects of homogenizing and aging treatments on the microstructure and microhardness of an Nb-silicide based ultrahigh temperature alloy
- Alloys with thermal expansion matching to electrolyte materials for solid oxide fuel cells
- Simulation-based study of the compensation coil method applied to ferrite nanometric powders
- DGM News
- Zum 75. Geburtstag von Prof. Dr.-Ing. habil. Peter Klimanek
Artikel in diesem Heft
- Contents
- Contents
- Basic
- Thermodynamic modeling of the Pt–Zr system
- Experimental investigation and thermodynamic prediction of the Ga–Sb–Sn phase equilibria
- Calculation of the viscosity of the liquid ternary Ag–Au–Sn system
- Thermophysical properties of liquid tin–bismuth alloys
- A comparative AFM study of carbon alloyed Mo–Se–C and W–S–C films for tribological applications
- Luminescence of Fe-substituted ZnWO4 powders synthesized by aqueous solution reaction
- Electromagnetic radiation during plastic deformation under unrestricted quasi-static compression in metals and alloys
- Applied
- Microstructure and mechanical properties of Fe3Al–TiC composites
- Study of wear behaviour of ductile iron subjected to two step austempering
- Effect of annealing on formability and crystallographic textures of aluminium 5052 alloy sheets
- The use of fly ash and basaltic pumice as additives in the productionof clay fired brick in Turkey
- Insulation properties of bricks made with cotton and textile ash wastes
- Effects of homogenizing and aging treatments on the microstructure and microhardness of an Nb-silicide based ultrahigh temperature alloy
- Alloys with thermal expansion matching to electrolyte materials for solid oxide fuel cells
- Simulation-based study of the compensation coil method applied to ferrite nanometric powders
- DGM News
- Zum 75. Geburtstag von Prof. Dr.-Ing. habil. Peter Klimanek
