A5103194178- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Nuclear materials and radiation effects
- Advanced Condensed Matter Physics
- Advanced Surface Polishing Techniques
- Diamond and Carbon-based Materials Research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystal Structures and Properties
- Electronic and Structural Properties of Oxides
- Advanced machining processes and optimization
- Crystallography and molecular interactions
- Thin-Film Transistor Technologies
- Solar Thermal and Photovoltaic Systems
- MXene and MAX Phase Materials
- Silicon and Solar Cell Technologies
- Planetary Science and Exploration
- earthquake and tectonic studies
- Metal and Thin Film Mechanics
- Copper-based nanomaterials and applications
- Rock Mechanics and Modeling
- Ferroelectric and Piezoelectric Materials
- Ion-surface interactions and analysis
- Advanced materials and composites
- Mitochondrial Function and Pathology
Institute of Tibetan Plateau Research
2019-2024
Chinese Academy of Sciences
2019-2024
Center for Excellence in Tibetan Plateau Earth Sciences
2019-2024
Anhui Medical University
2024
Henan Polytechnic University
2023-2024
Peking University
2015-2019
China Academy of Engineering Physics
2018-2019
In situ high-pressure experiments on La2Zr2O7 and La0.5Gd1.5Zr2O7 have been carried out at up to approximately 40 GPa using synchrotron X-ray diffraction Raman spectroscopy combined with a diamond anvil cell technique. Both undergo phase transition from pyrochlore (Fd3̄m) into cotunnite-like (Pnma) 22.7 23.3 GPa, respectively. This type of is mainly controlled through the order-disorder occupancy cations, Gd3+ substitution La3+ reduces stability zirconate pyrochlore. However, abnormal...
This study utilizes both experimental and computational approaches to investigate the performance of Lu
Abstract Greigite (Fe 3 S 4 ), isostructural with Fe O has recently attracted great scientific interests from material science to geology due its complicated structure and electronic magnetic configurations. Here, an investigation into the structural, properties of under high pressure been conducted by first-principle calculations based on density functional theory. The results show that a first-order phase transition would occur inverse spinel (SP) Cr -type (CS) at 3.4 GPa, accompanied...
CrO<sub>2</sub> can undergo the pressure-induced phase transition sequence of rutile-type → CaCl<sub>2</sub>-type pyrite-type <italic>Pnma</italic> (Fe<sub>2</sub>P-type→) <italic>I</italic>4/<italic>mmm</italic>.
Abstract The high‐pressure behavior of hafnon has been systematically investigated by combining in situ synchrotron X‐ray diffraction, Raman, high‐resolution transmission electron microscopy (HRTEM) techniques, and theoretical simulations. Hafnon starts phase transition at 26.6 GPa completes the to an irreversible scheelite (, Z = 4, a 0 4.712 Å, c 10.378 Å) ∼45 GPa. HRTEM observation interface between phases allows atomic scale understanding process with relationship (200) h ‖(112) s , //,...
Abstract Fe-bearing phase E coexisting with ringwoodite and wadsleyite has been synthesized at near-geotherm temperatures in hydrous KLB-1 peridotite compositions held 18 19 GPa, 1400 °C for 27 h. The long heating duration time of syntheses implies that can be a stable component the mantle under conditions. Single-crystal X-ray diffraction analyses show M1 octahedral site is 72.1–75.2 at% occupied, whereas M2 tetrahedral Si sites are 2.4–2.9 18.9–19.8 respectively. occupancies positive...
The newly carbide α-Mo2Ga2C with P63/mmc space group presents a unique top-packed Ga double layer structure. Pressure-induced phase transition of Mo2Ga2C has been investigated by in-situ high-pressure synchrotron radiation X-ray diffraction, Raman spectroscopy combined diamond anvil cell technique, and first-principle calculations. Both experimental theoretical results show that first-order from to P3¯m1 occurs at ∼22 GPa, where the named β-Mo2Ga2C close-packed zig-zag isothermal...
An experimental study on ordered pyrochlore structured Gd 1.5 Ce 0.5 Ti 2 O 7 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo stretchy="false">(</mml:mo> <mml:mi>F</mml:mi> <mml:mi>d</mml:mi> <mml:mrow> <mml:mover> <mml:mn>3</mml:mn> stretchy="false">¯</mml:mo> </mml:mover> </mml:mrow> <mml:mi>m</mml:mi> stretchy="false">)</mml:mo> </mml:math> was carried out up to 45 GPa by synchrotron radiation X-ray diffraction and Raman spectroscopy. Experimental...
Abstract The effect of defects on the high‐pressure behavior materials is fundamental to understanding and designing for extreme environments. Previous work has demonstrated that radiation damage can enhance phase stability or alter transformation pathway. Here, we report CeO 2 irradiated by swift heavy ions. particular interest because it be used as a non‐radioactive surrogate UO PuO . High‐pressure Raman spectroscopy shows low‐fluence ion exhibits nearly same unirradiated ; whereas, after...
Austenitic heat‐resistant cast steel is widely used in the manufacture of automotive exhaust manifolds and other occasions for its superior performance. Longitudinal‐torsional ultrasonic vibration‐assisted milling (LTUM) technology can effectively slow down tool wear improve surface quality. In presented work, a longitudinal‐torsion method ceramic cutter proposed, effects cutting performance mechanisms ordinary (OM) longitudinal‐torsional austenitic with tools are investigated. The...
PbAl3(PO4)2(OH,H2O)6, an important environmental mineral, is in-situ studied by synchrotron x-ray diffraction (XRD) and Raman scattering combined with diamond anvil cells (DACs) at pressures up to ∼11.0 GPa room temperature. The XRD results indicate that plumbogummite does not undergo a phase transition between 0 10.9 GPa. Moreover, the c axis more compressible than axis, revealing its anisotropic behavior. pressure-volume data are fitted third-order Birch-Murnaghan equation of state yield...
The common material of bearing rings is GCr15 steel which a typical difficult-to-machine material. As an important working surface the bearing, inner raceway plays vital role in performance bearing. means to solve high-performance manufacturing materials, longitudinal-torsional ultrasonic processing widely used various types processing. In presented work, basic size horn obtained from wave equation forced vibration, and modal analysis amplitude test are carried out verify rationality LUTG...
In the present study, we extensively explored high-pressure behaviors and vibrational properties of amblygonite LiAlPO4F with elevated pressures up to 34.3 GPa based on single-crystal X-ray diffraction measurements, Raman spectroscopy, DFT calculations. The compressibility elastic were determined first. Specifically, obtained isothermal bulk modulus is 128(4) triclinic phase exhibited anisotropic compression axial βc > βa βb a ratio 1.11:1.00:1.20. spectra showed no indication...