| Autor: | A. Barbu, T. Bretheau, D. Caldemaison, Jérôme Crépin, G. Jazkierowitcz |
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| Rok vydání: | 1997 |
| Předmět: |
010302 applied physics
Zirconium Materials science Scanning electron microscope Precipitation (chemistry) Mechanical Engineering Zirconium alloy Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences law.invention Crystallography chemistry Mechanics of Materials Transmission electron microscopy law 0103 physical sciences Microscopy General Materials Science Electron microscope 0210 nano-technology |
| Zdroj: | Journal of Materials Science. 32:4841-4846 |
| ISSN: | 0022-2461 |
| DOI: | 10.1023/a:1018603619366 |
| Popis: | In this study we focus on the precipitation of betagenic elements (Fe, Cr, Ni) that occurs during the β → α allotropic transition in zirconium. In particular its structural characteristics, morphology and their consequences for the mechanical behaviour of the material are probed. The observations are made by means of a scanning electron microscope and a transmission electron microscope. The results reveal the occurrence of a quasi-continuous single crystalline phase, produced by the precipitation of the betagenic additional elements which constitute the so-called lath boundaries. This phase forms a layer surrounding the laths in the bulk of the material. Its morphology could be assimilated to a net, created by precipitates with a size of several micrometres and linked by narrow bridges with a size of several hundred nanometres. The chemical composition of the precipitates are of the Zrx(Cr, Fe2)1 - x type with x ≤ 40%. |
| Databáze: | OpenAIRE |
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