Abstract
The HoDyYGdTb high-entropy alloy (HEA) was synthesized and its structural phase transitions were determined under compression up to 60.1GPa at room temperature. Three transformations following the sequence hexagonal close-packed (hcp)→samarium type (Sm-type)→double hexagonal close-packed (dhcp)→distorted face-center cubic (dfcc) are observed at 4.4, 26.7, and 40.2GPa, respectively. The high pressure equation of state was determined for the HEA according to third-order Birch-Murnaghan equation of state. The results show that the bulk modulus and atomic volume of the alloy obey the “additivity law”.
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