The origin of a two-stage endothermic reaction in Zr36Ti 24Be40 metallic glass was investigated by differential scanning calorimetry (DSC), thermo-mechanical analyzer (TMA) and high resolution transmission electron microscopy (HREM). HREM image of a specimen heated to 420 °C under a constant applied tensile stress of 3 MPa showed the formation of medium-range-ordered clusters 1 nm to 2 nm in size. This phenomenon is attributed to strain-induced deformation. This suggests that the formation of clusters may be an appropriate interpretation of the additional endothermic heat in the supercooled liquid region.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory Program of Korea Ministry of Science and Technology. J. H. Na acknowledges the support from the Second Stage of Brain Korea 21 Project in 2007. Y. C. Kim thanks the Center for Nanostructured Materials Technology under the ‘21st Century Frontier R&D Programs’ for the grant (code #: 07k1501-00410). W. T. Kim acknowledges the financial support from Cheongju University through the special research grant program (2006-2008).
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry