Thermal stability, crystallization kinetics, and grain growth in an amorphous Al85Ce5Ni8Co2 alloy

A. Révész, L. Varga, S. Suriñach, M. D. Baró

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18 Citations (Scopus)

Abstract

Thermal stability and crystallization kinetics of the melt-quenched amorphous Al85Ce5Ni8Co2 alloy were investigated by x-ray diffraction and differential scanning calorimetry (DSC). The glass transition was followed by a supercooled liquid region (21°C) and then by a two-step crystallization process. The final microstructure contained Al3Ce, α-Al, Al3Ni, and Al9Co2 phases. Isothermal annealing of the as-quenched samples in the range of 275-285°C showed that both crystallization reactions occurred through a nucleation and growth process. Continuous heating DSC measurements following pre-anneals for different times were also carried out to study the crystallization kinetics and the stability of the material. The Avrami analysis of the isothermal DSC-curves revealed that the 3-dimensional nucleation and growth process became more dominant with increasing annealing temperature. The average specific grain boundary energy corresponded to high-angle grain boundaries and indicated independent nucleation events.

Original languageEnglish
Pages (from-to)2140-2146
Number of pages7
JournalJournal of Materials Research
Volume17
Issue number8
Publication statusPublished - Aug 2002

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Crystallization kinetics
Amorphous alloys
Grain growth
Differential scanning calorimetry
Thermodynamic stability
Nucleation
thermal stability
crystallization
Crystallization
heat measurement
kinetics
Grain boundaries
nucleation
scanning
Isothermal annealing
grain boundaries
annealing
Glass transition
Diffraction
Annealing

ASJC Scopus subject areas

  • Materials Science(all)

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Thermal stability, crystallization kinetics, and grain growth in an amorphous Al85Ce5Ni8Co2 alloy. / Révész, A.; Varga, L.; Suriñach, S.; Baró, M. D.

In: Journal of Materials Research, Vol. 17, No. 8, 08.2002, p. 2140-2146.

Research output: Contribution to journalArticle

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