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| Hauptseite > Publikationsdatenbank > Oxidation von ferritischen 9 - 12 % Cr-Stählen in wasserdampfhaltigen Atmosphären bei 550 bis 650 Grad Celsius > print |
| Hauptseite > Publikationsdatenbank > Oxidation von ferritischen 9 - 12 % Cr-Stählen in wasserdampfhaltigen Atmosphären bei 550 bis 650 Grad Celsius > print |
| 001 | 24991 | ||
| 005 | 20240711092233.0 | ||
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| 088 | 1 | _ | |a Juel-3883 |
| 088 | _ | _ | |a Juel-3883 |2 JUEL |
| 100 | 1 | _ | |0 P:(DE-Juel1)VDB2544 |a Ehlers, Rolf Jörg |b 0 |e Corresponding author |u FZJ |
| 245 | _ | _ | |a Oxidation von ferritischen 9 - 12 % Cr-Stählen in wasserdampfhaltigen Atmosphären bei 550 bis 650 Grad Celsius |
| 260 | _ | _ | |a Jülich |b Forschungszentrum Jülich GmbH, Zentralbibliothek, Verlag |c 2001 |
| 300 | _ | _ | |a III, 199 p. |
| 336 | 7 | _ | |0 PUB:(DE-HGF)11 |2 PUB:(DE-HGF) |a Dissertation / PhD Thesis |
| 336 | 7 | _ | |0 PUB:(DE-HGF)3 |2 PUB:(DE-HGF) |a Book |
| 336 | 7 | _ | |0 2 |2 EndNote |a Thesis |
| 336 | 7 | _ | |2 DRIVER |a doctoralThesis |
| 336 | 7 | _ | |2 BibTeX |a PHDTHESIS |
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| 336 | 7 | _ | |2 ORCID |a DISSERTATION |
| 490 | 0 | _ | |0 PERI:(DE-600)2414853-2 |8 245 |a Berichte des Forschungszentrums Jülich |v 3883 |x 0944-2952 |
| 500 | _ | _ | |a Record converted from VDB: 12.11.2012 |
| 502 | _ | _ | |a Aachen, Techn. Hochsch., Diss., 2001 |b Dr. (FH) |c Techn. Hochsch. Aachen |d 2001 |
| 520 | _ | _ | |a Economical and ecological considerations with respect to the need for reduction of CO$_{2}$ emission and fuel consumption in conventional steam power plants are leading to the requirement for the utilities to increase the thermal efficiency of power generation plant. An increase in steam temperature from former 535 to 650°C and in steam pressure from 185 to 300 bar would enable a reduction in fuel consumption and a reduction of CO$_{2}$ emission of more than 25%. A number of high strength 9-12% Cr steels have been developed for applications as construction materials in such advanced power plants. Besides mechanical properties, the oxidation resistance of these new steels is becoming an increasingly important material selection criterion. Whereas exposure tests in oxygen and in air show that the steels possess excellent oxidation resistance, it is well known that the presence of water vapour in the test atmosphere significantly enhances the oxidation rates of these steels. In the present work, the oxidation behaviour of several of the new 9-12 wt.% Cr steels in environments containing water vapour, mainly Ar-50 vol.% H$_{2}$O has been studied especially at temperatures between 550 and 650°C. The oxidation behaviour is compared to that of common alloys such as 1CrMoV, 12Cr1MoV and the austenitic steel 316LN. Besides this, a number of model alloys were investigated to study the influence of alloying elements on the oxidation behaviour. A variety of analytical methods have been used, such as optical microscopy, electron microscopy (SEM incl. EDX and WDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), secondary ion mass spectroscopy (SIMS) and various specially designed experimental techniques, e. g. in-situ gas change between wet and dry gas, as well as oxygen-18 isotope tracer experiments. The results of the oxidation tests clearly indicate that the oxygen coming from the water vapour is incorporated in the oxide scale in a different way as the oxygen originating from the O$_{2}$ molecule. A typical feature of 9-12% Cr-steels is the bell-shaped temperature dependence of the oxidation rates in water vapour, i. e. at 550 and especially at 800°C the oxidation rates are much lower than at 600 to 650°C. For the enhanced oxidation rates of the 9-12 chromium steels in environments containing water vapour a mechanism is proposed which involves the evaporation of volatile iron hydroxide. Tests with simple model steels have shown that additions of cobalt may provide significant improvement in the steam oxidation behaviour of the studied steels. |
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| 700 | 1 | _ | |0 P:(DE-Juel1)129782 |a Quadakkers, Willem J. |b 1 |u FZJ |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/24991/files/J%C3%BCl_3883_Ehlers.pdf |y OpenAccess |
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