ACTA

Migratory Nature of the Disaccommodation Phenomenon Depending on the Relaxation Time

B. Jeż^a, P. Postawa^a, A. Kalwik^a, M. Nabiałek^b, K. Błoch^b, S. Walters^c, A.V. Sandu^{d, e, f}
^aDepartment of Technology and Automation, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, al. Armii Krajowej 19c, 42-200 Częstochowa, Poland
^bDepartment of Physics, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
^cAdvanced Engineering Centre, University of Brighton, BN2 4GJ, Brighton, United Kingdom
^dFaculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iaşi, Boulevard D. Mangeron, No. 51, 700050 Iasi, Romania
^eRomanian Inventors Forum, Str. P. Movila 3, 700089 Iasi, Romania
^fNational Institute for Research and Development for Environmental Protection INCDPM, 294 Splaiul Independentei, 060031 Bucharest, Romania

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One of the characteristics of the amorphous state is metastability, which results in structural relaxation even at low temperatures. These relaxations contribute to the magnetic properties of amorphous alloys, such as the value of the coercive field, losses from hysteresis and magnetic susceptibility. In amorphous materials, as opposed to crystalline ones, the description of relaxation phenomena is difficult due to the fact that these processes are described by the activation energy spectrum and occur in a wide temperature range. The paper presents the results of the analysis of migration processes based on the adopted H. Kronmüller model, in which the reorientation of atoms takes place in areas of a reduced volume called free volumes.

DOI:10.12693/APhysPolA.142.157
topics: bulk amorphous alloys, injection casting, disaccommodation