On the level of mechanical loss in metallic glasses
I. Physikalisches Institut, Universität Göttingen, 37077 Göttingen, Germany
2 Department of Chemistry and Biochemistry, Arizona State University, Tempe, 85287-1604 Arizona, USA
Corresponding author: a email@example.com
Revised: 10 February 2011
Published online: 18 March 2011
Metallic glass samples with compositions Zr65Al7.5Cu27.5 and Pd77Cu6Si17, for which loss factors of up to 10-2 have been reported, are reinvestigated with an electrostatic vibrating cantilever technique that detects dissipation factors tan δ as low as 10-4. It is found that tan δ ≈ 4×10-4 is a typical value for these alloys well below Tg, suggesting that previous results were limited by instrumental resolution. While aging the glasses increases their elastic moduli considerably, the measured loss factor is affected only marginally by thermal history.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2011