Scalling approach to describe the nanocrystallization kinetics in Al based bulk amorphous alloys.

• Autorzy: Fazakas E. , Varga L.K.
• Konferencja: International Conference on Fabrication and Properties of Metallic Nanomaterials, Warsaw, 17-19 June, 2004.
• Języki publikacji: EN

Abstrakty

EN

The scalling approach was found to apply to the nano-crystallization stage in the framework of the Johnson-Mehl-Avrami theory of nucleation and growth phenomena. By rescalling the time axis for each annealing temperature, the data fall on a universal curve of the JMA form x(tau) = 1 - exp(- tau n In 2), where tau = t/t1/2, with t1/2 = t1/2 (Tann) is related to the nucleation rate and is taken the time at which crystallization is 50% complete. The scalling time parameter, t1/2, was found to diverge with decreasing annealing temperature, defining a characteristic freezing temperature, Tf. Ts parameter can be fitted to a Williams-Landel-Ferry temperature dependence, suggesting a correlation between Tf and Tg (the glass transition temperature).

Słowa kluczowe

EN

nanocrystalization; kinetics; aluminium alloy; amorphous alloy

PL

nanokrystalizacja; kinetyka; stop aluminium; stop amorficzny

• Wydawca: Komitet Nauki o Materiałach PAN
• Czasopismo: Archives of Materials Science
• Rocznik: 2004
• Tom: Vol. 25, nr 4
• Strony: 365--372

Twórcy

autor

Fazakas E.

• Research Institute for Solid State Physics and Optics, 1525 Budapest, P.O.B. 49, Hungary

autor

Varga L.K.

• Research Institute for Solid State Physics and Optics, 1525 Budapest, P.O.B. 49, Hungary

• Research Institute for Solid State Physics and Optics, 1525 Budapest, P.O.B. 49, Hungary

Bibliografia

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