In order to investigate the mechanical relaxation behaviors of a Zr 28Y28Al22Co22 phase separating metallic glass, dynamic mechanical measurements of the tensile storage and loss moduli were performed for broad temperature and frequency ranges. The glass transition of each separated phase in the as-spun ribbon was manifested by the double decreasing of the storage modulus and two loss modulus peaks. The master curves for tanδ of the as-spun and heat-treated specimens were constructed according to the time-temperature superposition principle. From the temperature dependence of the shift factor, the activation energies for the primary and secondary relaxation of both specimens were calculated and the effects of the interconnected structure of the dual-phase as-spun ribbon and partially crystallized ribbon on the mechanical relaxation behaviors were studied.
Bibliographical noteFunding Information:
This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology and by the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program of the Korea Ministry of Knowledge Economy. H. T. Jeong, W. Yook and B. J. Kim acknowledge the support of the Brain Korea 21 Project in the Division of Humantronics Information Materials.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry