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• W4293081872 abstract "Achieving effective tuning of glass structures between distinct states is intriguing for fundamental studies and applications, but has previously turned out to be challenging in practice. High-entropy metallic glasses (HEMGs), as an emerging type of metallic glasses (MGs) based on the high-entropy effect, are expected to have more disordered and frustrated chemical short-range structure compared with conventional MGs. Therefore, HEMGs may offer possibilities for structure and properties tuning in glasses. In this work, we employ pressure as a tuning parameter and monitor the atomic structural evolution of a senary HEMG, ${mathrm{Ti}}_{16.7}{mathrm{Zr}}_{16.7}{mathrm{Hf}}_{16.7}{mathrm{Cu}}_{16.7}{mathrm{Ni}}_{16.7}{mathrm{Be}}_{16.7}$, up to ensuremath{sim}40 GPa using in situ synchrotron x-ray diffraction. Analysis of its structure factor in reciprocal space and reduced pair distribution function in real space both reveal a pressure-induced structural crossover at ensuremath{sim}20 GPa with a dramatic change in short-range order (SRO), while no similar phenomenon is observed in a conventional MG, ${mathrm{Cu}}_{36}{mathrm{Zr}}_{64}$, as a control sample, suggesting the pressure-induced highly tunable SRO in HEMGs originates from the local chemical complexity, namely, the high-entropy effect. These results confirm that enhanced flexibility and tunability of atomic structures could be achieved by introducing the high-entropy effect into MGs. Therefore, configurational entropy could be another dimension for exploring MGs with highly tunable structures and properties for various potential applications." @default.
• W4293081872 created "2022-08-26" @default.
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• W4293081872 date "2022-06-09" @default.
• W4293081872 modified "2023-10-15" @default.
• W4293081872 title "Pressure-induced local structural crossover in a high-entropy metallic glass" @default.
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• W4293081872 doi "https://doi.org/10.1103/physrevb.105.224201" @default.
• W4293081872 hasPublicationYear "2022" @default.
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