Study of crystallization of Y-based metallic glasses by differential scanning calorimetry and neutron diffraction
- 1 January 1987
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 48 (9) , 1541-1546
- https://doi.org/10.1051/jphys:019870048090154100
Abstract
The crystallization of the Ni33Y67 and Cu33 Y67 metallic glasses has been investigated by differential scanning calorimetry and neutron diffraction. The crystallization occurs in two steps which for Ni33Y67 are the primary crystallization of the Y3Ni compound and the eutectic crystallization of the Y 3Ni and Y3Ni2 compounds, and for Cu33Y 67 the coprecipitation of the cubic YCu phase, the hcp Y phase and a metastable phase and at higher temperatures the decomposition of this third phase into YCu and Y. From a comparison with data on Zr-based glasses and using the hole model of Buschow [1], we show that the important size effect can explain the small activation energies for the crystallization of Ni 33Y67 and Cu33Y67 and the occurrence of a chemical short-range order, as in Ni33Y67, does not always imply a higher thermal stabilityKeywords
This publication has 12 references indexed in Scilit:
- Partial structure factors and chemical short-range order in Ni33Y67and Cu33Y67metallic glassesJournal of Physics F: Metal Physics, 1987
- Some aspects of the precipitation of Feα crystallites in the FePC amorphous alloySolid State Communications, 1985
- Study of the enthalpies of formation and crystallization in the system Zr-NiJournal of Applied Physics, 1984
- Effect of short-range order on the thermal stability in amorphous Ti-Ni alloysJournal of Applied Physics, 1984
- Short-range order and thermal stability in amorphous alloysJournal of Physics F: Metal Physics, 1984
- Stability of amorphous alloysSolid State Communications, 1982
- The Cu−Y (Copper-Yttrium) systemBulletin of Alloy Phase Diagrams, 1981
- A study of the crystallisation process in the metallic glass Y0.66Fe0.34Journal of Physics F: Metal Physics, 1981
- Thermal stability of amorphous alloysSolid State Communications, 1980
- Y3Ni2: a new tetragonal phase with Ni-centred trigonal prismsActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1977