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| Hauptseite > Publikationsdatenbank > Effect of water vapour on growth and adherence of chromia scales on pure chromium > print |
| Hauptseite > Publikationsdatenbank > Effect of water vapour on growth and adherence of chromia scales on pure chromium > print |
| 001 | 58936 | ||
| 005 | 20240711092259.0 | ||
| 020 | _ | _ | |a 978-3-89336-486-2 |
| 024 | 7 | _ | |2 Handle |a 2128/2628 |
| 024 | 7 | _ | |2 URI |a 2628 |
| 024 | 7 | _ | |2 ISSN |a 1433-5522 |
| 037 | _ | _ | |a PreJuSER-58936 |
| 041 | _ | _ | |a English |
| 082 | _ | _ | |a 620 |
| 100 | 1 | _ | |0 P:(DE-Juel1)VDB24644 |a Michalik, Marek |b 0 |e Corresponding author |g male |u FZJ |
| 245 | _ | _ | |a Effect of water vapour on growth and adherence of chromia scales on pure chromium |
| 260 | _ | _ | |a Jülich |b Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag |c 2007 |
| 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 |
| 336 | 7 | _ | |2 DataCite |a Output Types/Dissertation |
| 336 | 7 | _ | |2 ORCID |a DISSERTATION |
| 490 | 0 | _ | |0 PERI:(DE-600)2414930-5 |8 28814 |a Schriften des Forschungszentrums Jülich. Reihe Energietechnik / Energy Technology |v 67 |
| 500 | _ | _ | |a Record converted from VDB: 12.11.2012 |
| 502 | _ | _ | |a RWTH Aachen, Diss., 2007 |b Dr. (Univ.) |c RWTH Aachen |d 2007 |
| 520 | _ | _ | |a The oxidation behaviour of chromium was studied in the temperature range 950 to 1050$^{\circ}$C. A number of atmospheres such as Ar-O$_{2}$, Ar-H$_{2}$-H$_{2}$O, and more complex N$_{2}$-O$_{2}$-H$_{2}$O and N$_{2}$-H$_{2}$-H$_{2}$O were used, to allow the effects of oxygen and water vapour partial pressures to be determined. It was shown that the oxide scale formed in Ar-O$_{2}$ environments was dependent on the oxygen partial pressure. Decreasing the pO$_{2}$ in such gas mixtures lowered the oxidation rate and improved scale adherence. Different behaviour was found in Ar-H$_{2}$-H$_{2}$O. Scale adherence remained good in all low pO$_{2}$ gases and decreasing the pO$_{2}$ in the gas (this was done by using gases of higher H$_{2}$/H$_{2}$O ratio) led to an increase in the oxidation rate. The main finding of the work was that the oxide scale formed on chromium in Ar-H$_{2}$O and Ar-H$_{2}$- H$_{2}$O gases significantly differs from that formed in Ar-O$_{2}$. It appeared that oxide grains were much smaller in low pO$_{2}$ gases containing water vapour than in dry high pO$_{2}$ gases. It is believed that this effect of water vapour on the oxide morphology development is due to the faster adsorption and dissociation of H$_{2}$O at the outer surface compared with O$_{2}$, which enhance the inward transport of oxygen ions to the metal/oxide interface. It is proposed that increased oxygen grain boundary diffusion is the dominant process but molecular transport of H$_{2}$ and H$_{2}$O through the scale could also operate and contribute to the inner scale growth. The tracer study combined with SNMS techniques showed that in low pO$_{2}$ gases a significant amount of the scale was formed at the metal/oxide interface and this supports the observations that smaller oxide grains promote inward oxygen transport. It was also found that the extent of inward growth was higher in Ar-H$_{2}$-H$_{2}$O than in Ar-H$_{2}$O gas. This may indicate that the oxygen partial pressure of the gas or the hydrogen partial pressure were also factors determining the oxidation behaviour in low pO$_{2}$ gases. [...] |
| 536 | _ | _ | |0 G:(DE-Juel1)FUEK402 |2 G:(DE-HGF) |a Rationelle Energieumwandlung |c P12 |x 0 |
| 655 | _ | 7 | |a Hochschulschrift |x Dissertation (Univ.) |
| 700 | 1 | _ | |0 P:(DE-Juel1)VDB58075 |a Hänsel, Michael |b 1 |e Author |g male |u FZJ |
| 700 | 1 | _ | |0 P:(DE-Juel1)129782 |a Quadakkers, Willem J. |b 2 |e Author |g male |u FZJ |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/58936/files/Energietechnik_67.pdf |y OpenAccess |
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| 913 | 1 | _ | |0 G:(DE-Juel1)FUEK402 |b Energie |k P12 |l Rationelle Energieumwandlung |v Rationelle Energieumwandlung |x 0 |
| 914 | 1 | _ | |y 2007 |
| 915 | _ | _ | |0 StatID:(DE-HGF)0510 |2 StatID |a OpenAccess |
| 920 | _ | _ | |l yes |
| 920 | 1 | _ | |0 I:(DE-Juel1)VDB810 |d 30.09.2010 |g IEF |k IEF-2 |l Werkstoffstruktur und Eigenschaften |x 1 |
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