Crystallization of As-quenched and Hydrogenated CU50Ti40Al10 Amorphous Alloy
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Tony Spassov
Abstract
The influence of hydrogen on the crystallization of meltspun Cu50Ti40Al10 amorphous alloy was studied by DSC, TEM, X-ray and electron diffraction. The isothermal crystallization kinetics of the as-quenched glass revealed that the most probable crystallization mechanism is nucleation and subsequent three dimensional diffusion controlled growth. A strong influence of hydrogen on the crystallization of this amorphous alloy was found. Hydrogenation leads to drastic decreasing of the thermal stability, due to phase separation in the amorphous state and to formation of nanocrystalline structure during crystallization. The activation energy of the nanocrystallization reaction was determined by the Kissinger method.
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One of the authors, T. Spassov, would like to thank Prof. U. Koester (Dortmund) for the condition provided to produce the amorphous specimens. Part of this work has been supported by the DAAD (Germany).
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© 1998 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Aufsätze
- Thermodynamic Investigations of the System Ge–Sn–Te
- The Amorphous Metallic Al91La5Ni4 Alloy: Kinetics of Crystallization
- Crystallization of As-quenched and Hydrogenated CU50Ti40Al10 Amorphous Alloy
- Structure and Ordering in Cu–Si and Ni–Si Molten Alloys
- Rasterelektronenmikroskopische und röntgenanalytische Gefügeuntersuchungen von Al- und Si-legiertem Gußeisen mit Kugel-und Vermiculargraphit
- The Influence of Carbon on the Discontinuous Precipitation Reaction in a Co-15 wt.% Mo Alloy
- Solute Distribution Analysis in Directionally Solidified Al-5.7 wt.% Ni Eutectic Alloy
- Effect of Second Phase Particles on the Grain Size of a Multi-microalloyed Medium Carbon Steel
- In-situ Beobachtung der thermo- und spannungsinduzierten martensitischen Phasenumwandlung
- Hinweise für autoren
- Instructions to authors
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Veranstaltungen
- Terminkalender
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Aufsätze
- Thermodynamic Investigations of the System Ge–Sn–Te
- The Amorphous Metallic Al91La5Ni4 Alloy: Kinetics of Crystallization
- Crystallization of As-quenched and Hydrogenated CU50Ti40Al10 Amorphous Alloy
- Structure and Ordering in Cu–Si and Ni–Si Molten Alloys
- Rasterelektronenmikroskopische und röntgenanalytische Gefügeuntersuchungen von Al- und Si-legiertem Gußeisen mit Kugel-und Vermiculargraphit
- The Influence of Carbon on the Discontinuous Precipitation Reaction in a Co-15 wt.% Mo Alloy
- Solute Distribution Analysis in Directionally Solidified Al-5.7 wt.% Ni Eutectic Alloy
- Effect of Second Phase Particles on the Grain Size of a Multi-microalloyed Medium Carbon Steel
- In-situ Beobachtung der thermo- und spannungsinduzierten martensitischen Phasenumwandlung
- Hinweise für autoren
- Instructions to authors
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Veranstaltungen
- Terminkalender
