Metallic glass samples with compositions Zr 65Al 7.5Cu 27.5 and Pd 77Cu 6Si 17, 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 T g, 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.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics