Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, BSRF, Beijing 100039, Peoples R China
The compression properties of Zr41Ti14Cu12.5Ni10Be22.5, Zr44.4Nb7Cu13.5Ni10.8Be24.3 bulk metallic glasses and Ni77P23 binary amorphous alloy are investigated at room temperature up to 24 GPa, 39 GPa and 30.5 GPa,respectively, using in-situ high pressure energy dispersive x-ray diffraction with a synchrotron radiation source. The pressure-volume relationship of Ni77P23 amorphous alloy is consistent well with the second order Birch-Murnaghan (B-M) equation within the experimental pressure range. However, under higher pressure, the experimental data of Zr-based specimens deviate from the B-M equation. Compare to the binary amorphous alloy, less excess free volume existing in the bulk metallilc glass and multi- component atomic configuration results in a two-stage relationship between compressibility and pressure.