Study of Amorphous-Crystalline Phase Transformations by DSC and Dilatometer in the Case of Al-Based Amorphous Alloys | Zendy

Éva Fazakas | Zendy; Béla Varga | Zendy; L.K. Varga | Zendy

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Study of Amorphous-Crystalline Phase Transformations by DSC and Dilatometer in the Case of Al-Based Amorphous Alloys

Author(s) -

Éva Fazakas,

Béla Varga,

L.K. Varga

Publication year - 2012

Publication title -

isrn metallurgy

Language(s) - English

Resource type - Journals

ISSN - 2090-8717

DOI - 10.5402/2012/602108

Subject(s) - dilatometer , amorphous solid , materials science , ribbon , phase (matter) , differential scanning calorimetry , atmospheric temperature range , transformation (genetics) , thermodynamics , analytical chemistry (journal) , mineralogy , composite material , thermal expansion , crystallography , chemistry , organic chemistry , physics , biochemistry , gene

The amorphous-crystalline transformation is studied by DSC and dilatometer. From the DSC signal the characteristic temperatures and the heat evolved during each transformation step can be determined. The dilatometer depicts the thermal contractions accompanying the changes in topological short range order. Although the characteristics temperatures determined by DSC and dilatometer, two methods are slightly different their dependences on the heating rate are very similar, where from the activation energies of each transformation steps can be determined using the Kissinger plots. As an example, two aluminum-based amorphous ribbon samples (Al88Mm5Ni5Co2 and Al85Y8Ni5Co2) will be measured and compared.

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