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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Publicado 4 números por año

ISSN Imprimir: 1093-3611

ISSN En Línea: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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X-RAY DETERMINATION OF RESIDUAL STRESSES AND PHASE QUANTIFICATION IN Zr02 OXIDE LAYERS FORMED ON ZIRCALOY-4

Volumen 2, Edición 3, 1998, pp. 359-367
DOI: 10.1615/HighTempMatProc.v2.i3.50
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SINOPSIS

The residual stress state and the microstructure of Zr02 oxide layers formed on Zircaloy-4 plates in steam at 400°C were studied using x-ray diffraction techniques.
One of the most important features of the corrosion mechanism of Zircaloy is the development of compressive stresses within the oxide which strongly affect the microstructure of the growing oxide and the diffusion of oxidizing species. These compressive stresses can also favor the formation of tetragonal zirconia over monoclinic zirconia. Therefore, the accurate determination of the stress state and the composition of the oxide is essential for the understanding of the corrosion mechanism and the modelling of its kinetics.
The samples were prepared by oxidation of Zy-4 plates in an autoclave at 400°C in a vapor pressure of 10.3 MPa. Using conventional x-ray diffraction, it can be shown that the amount of tetragonal zirconia in the oxide layer decreases continuously with the oxidation time, however, with this type of radiation it is very difficult to obtain the phase distribution and the stress level profile in the oxide layer.
To obtain more accurate information, specific diffractometers on the French synchrotron radiation facility (LURE Orsay) were used to work at higher wavelengths. The following experimental results were obtained :
- High compressive stresses were found in the oxide layer and a strong effect of the oxide texture was observed.
- There seems to be a trend for the tetragonal zirconia to be preferentially located at the interface metal/oxide.

CITADO POR
  1. Vermaak Natasha, Parry Guillaume, Estevez Rafael, Bréchet Yves, New insight into crack formation during corrosion of zirconium-based metal-oxide systems, Acta Materialia, 61, 12, 2013. Crossref

  2. Yilmazbayhan Aylin, Breval Else, Motta Arthur T., Comstock Robert J., Transmission electron microscopy examination of oxide layers formed on Zr alloys, Journal of Nuclear Materials, 349, 3, 2006. Crossref

  3. Zhang H.X., Fruchart D., Hlil E.K., Ortega L., Li Z.K., Zhang J.J., Sun J., Zhou L., Crystal structure, corrosion kinetics of new zirconium alloys and residual stress analysis of oxide films, Journal of Nuclear Materials, 396, 1, 2010. Crossref

  4. Pétigny N., Barberis P., Lemaignan C., Valot Ch., Lallemant M., In situ XRD analysis of the oxide layers formed by oxidation at 743 K on Zircaloy 4 and Zr–1NbO, Journal of Nuclear Materials, 280, 3, 2000. Crossref

  5. Le Saux M., Guilbert T., Brachet J.C., An approach to study oxidation-induced stresses in Zr alloys oxidized at high temperature, Corrosion Science, 140, 2018. Crossref

  6. Guillou R., Le Saux M., Rouesne E., Hamon D., Toffolon-Masclet C., Menut D., Brachet J.C., Béchade J.L., Thiaudière D., In-situ time-resolved study of structural evolutions in a zirconium alloy during high temperature oxidation and cooling, Materials Characterization, 158, 2019. Crossref

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