Thermomechanical analysis (TMA) correlated to differential scanning calorimetry (DSC) for ageing study of some metallic glasses

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.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.