Structural relaxation in a bulk metallic glass

Autor:	Marlene D. Houtz, James M. O’Reilly, Vincent H. Hammond
Rok vydání:	2003
Předmět:	Materials science Amorphous metal Enthalpy Mineralogy Thermodynamics Condensed Matter Physics Electronic Optical and Magnetic Materials Relaxation behavior Fragility Differential scanning calorimetry Materials Chemistry Ceramics and Composites Relaxation (physics) Glass transition
Zdroj:	Journal of Non-Crystalline Solids. 325:179-186
ISSN:	0022-3093
DOI:	10.1016/s0022-3093(03)00311-9
Popis:	Differential scanning calorimetry has been used to investigate the structural relaxation in a bulk metallic glass designated Vit 4. Results indicate that Vit 4 has a broad glass transition region with a glass transition temperature of approximately 621 K and an activation enthalpy of 834 kJ/mol. Despite the broad transition region, Wunderlich’s model suggests that structural relaxation in Vit 4 involves the cooperative motion of a single bead. The relaxation behavior was well described by the Tool–Narayanaswamy equation, with x and β values not significantly different from other glass formers. The dynamic and thermodynamic fragility of Vit 4 is compared with other glasses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cfeebaf8a19aaf134b31282bb1f58bbe https://doi.org/10.1016/s0022-3093(03)00311-9 Zobrazit plný text záznamu Full Text from ScienceDirect