Pressure-induced elastic anomaly in a polyamorphous metallic glass
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (People's Republic of China)
- Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab., HPCAT
- Hefei Univ. of Technology (China)
- Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES)
The pressure-induced transitions discovered in metallic glasses (MGs) have attracted considerable research interest offering an exciting opportunity to study polyamorphism in densely packed systems. Despite the large body of work on these systems, the elastic properties of the MGs during polyamorphic transitions remain unclear. Here, using an in situ high-pressure ultrasonic sound velocity technique integrated with x-ray radiography and x-ray diffraction in a Paris-Edinburgh cell, we accurately determined both the compressional and shear wave velocities of a polyamorphous Ce68Al10Cu20Co2 MG up to 5.8 GPa. We observed elastic anomalies of a MG with minima (at ~1.5 GPa) in the sound velocities, bulk modulus, and Poisson’s ratio during its polyamorphic transition. Finally, this behavior was discussed in comparison to the elastic anomalies of silica glass and crystalline Ce.
- Research Organization:
- Argonne National Laboratory. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); National Thousand Youth Talents Program in China; USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-06CH11357; FG02-99ER45775; NA0001974
- OSTI ID:
- 1368293
- Alternate ID(s):
- OSTI ID: 1985542
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 110; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
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