Abstract
To characterize the ageing of some metallic glasses, a correlated study of the differential scanning calorimetry method (DSC) and of the thermomechanical analysis (TMA) emphasizes the specificity of the latter. We analyzed metallic glasses which have been produced either by chemical methods or by melt spinning techniques. Using TMA and DSC, we have established that the relaxation of metallic glasses is strongly dependent on treatment applied: either thermal or mechanical history. Conversely, we do not observe large differences between DSC and TMA analysis for the crystallisation. From experimental data, we try to modelize the behaviour of this type of materials under operating conditions.
Zusammenfassung
Zur Charakterisierung des Alterns einiger metallischer Gläser wird in einer Vergleichsstudie der DSC-Methode und der thermomechanischen Analyse (TMA) die Spezifität letzterer hervorgehoben. Es wurden metallische Gläser untersucht, die entweder mittels chemischer Verfahren oder durch Schmelzverdüsen hergestellt wurden. Mittels DSC und TMA wurde festgestellt, da\ die Entspannung der metallischen Gläser stark von der Behandlungsweise abhängt, d.h. ob es sich um eine thermische oder mechanische Vorgeschichte handelt. Im Gegensatz dazu konnten bei der Kristallisation keine gro\en Unterschiede zwischen DSC und TMA gefunden werden. Anhand experimenteller Daten wurde versucht, das Verhalten derartiger Materialien unter den Betriebsbedingungen zu modellieren.
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The authors wish to thank Dr. H. Warlimont, Dr. Hilzinger and Dr. G. Herzer of Vaccumschmelze GmbH (Hanau F.R.G), Dr. E. Illekova and Dr. P. Duhaj of Institute of Physics (Bratislava, Tchecoslovaquie) for the scientific collaboration during which the melt spinned metallic glasses were supplied.
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Kuhnast, F.A. Thermomechanical analysis (TMA) correlated to differential scanning calorimetry (DSC) for ageing study of some metallic glasses. Journal of Thermal Analysis 38, 409–420 (1992). https://doi.org/10.1007/BF01915505
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DOI: https://doi.org/10.1007/BF01915505