Mechanical behaviors and phase transition of Ho 2 O 3 nanocrystals under high pressure
Journal Article
·
· Journal of Applied Physics
- Sichuan Univ., Chengdu (China). Inst. of Atomic & Molecular Physics; Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
- Sichuan Univ., Chengdu (China). Inst. of Atomic & Molecular Physics
- Sichuan Univ., Chengdu (China). Inst. of Atomic & Molecular Physics; China Academy of Engineering Physics, Mianyang (China). Inst. of Fluid Physics and National Key Lab. of Shockwave and Detonation Physic
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Carnegie Inst. of Science Argonne, IL (United States). High Pressure Synergetic Consortium (HPSync)
Mechanical properties and phase transition often show quite large crystal size dependent behavior, especially at nanoscale under high pressure. Here, we have investigated Ho2O3 nanocrystals with in-situ x-ray diffraction and Raman spectroscopy under high pressure up to 33.5 GPa. When compared to the structural transition routine cubic $->$ monoclinic $->$ hexagonal phase in bulk Ho2O3 under high pressure, the nano-sized Ho2O3 shows a much higher onset transition pressure from cubic to monoclinic structure and followed by a pressure-induced-amorphization under compression. The detailed analysis on the Q (Q = 2$$π$$/d) dependent bulk moduli reveals the nanosized Ho2O3 particles consist of a clear higher compressible shell and a less compressible core. Insight into these phenomena shed lights on micro-mechanism studies of the mechanical behavior and phase evolution for nanomaterials under high pressure, in general.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0001057
- OSTI ID:
- 1385864
- Alternate ID(s):
- OSTI ID: 1210833
OSTI ID: 22308911
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 116; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
catalysis (heterogeneous)
charge transport
energy storage (including batteries and capacitors)
hydrogen and fuel cells
materials and chemistry by design
mesostructured materials
phonons
solar (photovoltaic)
superconductivity
synthesis (novel materials)
thermoelectric
catalysis (heterogeneous)
charge transport
energy storage (including batteries and capacitors)
hydrogen and fuel cells
materials and chemistry by design
mesostructured materials
phonons
solar (photovoltaic)
superconductivity
synthesis (novel materials)
thermoelectric