| Autor: |
P. Lamparter, G. Van Tendeloo, I. Bakonyi, Ágnes Cziráki, M. Tegze, B. Fogarassy |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Journal of alloys and compounds |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/0925-8388(94)90128-7 |
| Popis: |
The structure of melt-spun ribbons of the alloys Zr 9 Ni 91 , Zr 10 Ni 90 and Hf 11 Ni 89 was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Ribbons of the Zr 9 Ni 91 and Zr 10 Ni 90 alloys prepared at a high cooling rate (ribbon thickness d =11 μm) were characterized by an amorphous matrix with a few per cent of quenched-in crystallites. The ribbon of the Hf 11 Ni 89 alloy prepared with the same thickness ( i.e. at the same cooling rate) exhibited a nanocrystalline grain structure of the HfNi 5 phase. Thicker ribbons of the Zr 9 Ni 91 alloy ( d =17–22 μm ), for which the quench rate was correspondingly lower, were obtained as a b.c.c. Ni(Zr) solid solution phase with a grain size of nearly 1 μm. A high resolution (HR) TEM study of one of the Zr 9 Ni 91 crystalline ribbons revealed a fine structure of the interior of the crystallites which can be attributed to an ordering on the Zr sublattice over distances of several nanometres within the b.c.c. grains. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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