We discuss the effect of Sn addition on anomalous glass transition behavior in Cu-Zr bulk-forming metallic glasses. We found that an unusual endothermic reaction in Cu55Zr40Sn5 ribbon can originate from the growth reaction of quenched-in nuclei from 0.4 nm to 3.7 nm in the supercooled liquid region. This anomalous devitrification may prove useful for the synthesis of a novel composite with uniform atomic/nanometer scale heterogeneity modulated by controlling cooling rate as well as by tailoring alloy composition.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory Program of the Korean Ministry of Science . One of the authors (E.S. Park) was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea . The authors are indebted to Dr. B.S. Seong at KAERI for performing the HRND experiment, Prof. K. Hono at NIMS, Japan for the SAXS experiment, and Prof. Frans Spaepen at Harvard University for thoughtful advice.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry