Thermal stability of nanocrystalline nickel electrodeposits: differential scanning calorimetry, transmission electron microscopy and magnetic studies
| Autor: | I. Bakonyi, E. Tóth-Kádár, Zs. Tonkovics, Ágnes Cziráki, I. Geröcs, T Tarnóczi, István Groma, B. Fogarassy |
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| Rok vydání: | 1994 |
| Předmět: |
Materials science
Scanning electron microscope Annealing (metallurgy) Mechanical Engineering Condensed Matter Physics Nanocrystalline material Crystallography Grain growth Differential scanning calorimetry Mechanics of Materials Transmission electron microscopy Curie temperature General Materials Science Thermal stability |
| Zdroj: | Materials Science and Engineering: A. :531-535 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/0921-5093(94)90261-5 |
| Popis: | The grain-growth process of electrodeposited nanocrystalline Ni foils upon heating has been studied by differential scanning calorimetry (DSC), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The direct structural observations have shown that the exothermic calorimetric peak detected at about 600 K corresponds to a grain growth process. Furthermore, the TEM pictures indicate that dislocation loops are formed during grain growth. An almost complete recovery of the Curie point has also been observed, although its correlation with the structural changes is still to be revealed. |
| Databáze: | OpenAIRE |
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