A5101933143- High-pressure geophysics and materials
- High-Velocity Impact and Material Behavior
- Rock Mechanics and Modeling
- Advanced ceramic materials synthesis
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Energetic Materials and Combustion
- Diamond and Carbon-based Materials Research
- Radiative Heat Transfer Studies
- Bone Tissue Engineering Materials
- Numerical methods in engineering
- Structural Response to Dynamic Loads
- Fiber-reinforced polymer composites
- Crystal Structures and Properties
- Mechanical Behavior of Composites
- Thermochemical Biomass Conversion Processes
- Metal and Thin Film Mechanics
- Regional Development and Environment
- Granular flow and fluidized beds
- Boron and Carbon Nanomaterials Research
- Coal Properties and Utilization
- Calcium Carbonate Crystallization and Inhibition
- Mineral Processing and Grinding
- Acoustic Wave Phenomena Research
- Geochemistry and Elemental Analysis
Sichuan University
2010-2024
China Academy of Engineering Physics
2014-2024
Institute of Fluid Physics
2014-2023
Institute of High Energy Physics
2017-2021
Northeastern University
2016-2021
Shanghai Jiao Tong University
2018-2021
Chinese Academy of Engineering
2018
Center for High Pressure Science and Technology Advanced Research
2017
Sichuan Normal University
2017
Kunming University of Science and Technology
2016
Abstract Understanding the melting behavior and thermal equation of state Fe‐Ni alloyed with candidate light elements at conditions Earth's core is critical for our knowledge region's structure chemical composition heat flow across liquid outer into lowermost mantle. Here we studied shock curve an Fe‐8 wt% Ni‐10 Si alloy up to ~250 GPa by hypervelocity impacts direct velocity reliable temperature measurements. Our results show that addition 10 Ni slightly depresses iron ~200–300 (±200) K...
Abstract A detailed investigation of planetary ball‐milling for coarsened AlON powder was carried out. Our results showed that the weight ratios milling ball‐to‐powder, revolution rate and time have significant impacts on microscopic morphology, particle size distribution average powder. The process mechanism were analyzed, outcome our study can be used to optimize complicated method by controlling or adjusting at final stage ball‐milling. Sequentially, using fine uniform optimized with an...
Abstract Earth’s outer core is liquid and dominantly composed of iron nickel (~5–10 wt%). Its density, however, ~8% lower than that iron, requires the presence a significant amount light element(s). A good way to specify element(s) direct comparison density sound velocity measurements between seismological data those possible candidate compositions at conditions. We report model composition in Fe-Ni-Si system conditions by shock-wave experiments. Combining with previous studies, we found...
The influence of the evolution numerous voids on macroscopic properties materials is a multiscale problem that challenges computational research. A shock-wave compression model for brittle material, which can obtain both microscopic and shock properties, was developed using discrete element methods (lattice model). Using interaction-parameter-mapping procedure, qualitative features, as well trends in calculated profiles, are shown to agree with experimental results. wave splits into an...
Abstract The shock Hugoniot of an Fe‐9 wt %Ni‐10 %Si system as a model the Earth's core has been measured up to ~280 GPa using two‐stage light‐gas gun. samples had average density 6.853 (±0.036) g/cm 3 . relationship between velocity ( U s ) and particle u p can be described by (km/s) = 3.95 (±0.15) + 1.53 (±0.05) (km/s). calculated temperatures melting curve indicate that composition melts above pressure ~168 GPa, which is significantly lower than shock‐melting iron (~225 GPa). A comparison...
Optical transparency is of paramount importance for visual armor and certain optical devices when subjected to severe impact conditions. Shock wave loading not only generates high pressure during hypervelocity impacts but also diminishes transmittance. To investigate transparent polycrystalline ceramic under harsh shock compression, this study performed experimental measurements considering the grain size effect. The findings, which pertain magnesium aluminate spinel (PMAS), indicate that...
To prevent functional failure, the macroscopic shock response of ceramics needs to be understood. We explored mesoscopic deformation features porous ceramics, which are responsible for measured “plastic” wave profiles, using polycrystalline modeling and experiments. A model is established that considers influence two major microstructures (multi-voids grain boundaries) in ceramics. Shock experiments with recovery shocked lead zirconate titanate were conducted. The computational results show...
Under shock pressures up to 210 GPa, we measured the refractive index of sapphire at a wavelength 1550 nm by performing plate impact experiments in order investigate its refractive-index change behaviors and phase transitions along Hugoniot state. There were two discontinuities ∼65 92 GPa ∼144 163 respectively. Moreover, above elastic limit, pressure dependence was divided into three segments, there large differences their pressure-change trends: decreased evidently with first segment (∼20...
The rapid propagation and coalescence of cracks catastrophic fractures, which occur often under shock compression, compromise a brittle material's design function restrict its scope practical application. plasticity materials can be improved significantly by introducing designing microstructure, help reduce or delay failure. We used lattice-spring model, describe elastic deformation fracture modeled material accurately, to study the influence void distributions (random, square, hexagonal,...
Abstract The porosity and corresponding microstructural features ultimately determine the properties of macroporous materials. In this work, porous PZT 95/5 ferroelectric ceramics having a common bulk density but with disperse agglomerated pore distribution were prepared to study their influence on physical properties. It is experimentally demonstrated that exhibits significant shock compression response behaviors. Porous pores exhibit enhanced resistance thus higher breakdown strengths than...
Abstract Particle crushing is commonly encountered during the storage, transportation, and handling of granular assemblies. This work aimed at ascertaining applicability four particle breakage criteria frequently mentioned in literature. Discrete element method (DEM) simulations were conducted to investigate spherical aggregates under multicontact loadings. Mean major principal stress criteria, octahedral shear criterion, maximal contact force (MCF) criterion then evaluated based on obtained...
We have synthesized the well-performance bulk diamond–SiC composite by high-temperature and high-pressure method employed light gas gun launched flyer plates to investigate shock compression response of composite. The plots velocity vs particle demonstrate presence double elastic waves in under compression. first wave travels at 13.1∼13.6km/s leads yielding ∼12.75GPa. second propagates 12.8∼13.0km/s does not display up ∼110GPa. Such a Hugoniot limit is apparently higher than that single...
Transparent ceramics are promising materials in the fields of high pressure and temperature. Based on a lattice-spring simulation method, novel polycrystalline model for shock-wave compression is established to explore dynamic response damage evolution yttrium aluminum garnet (YAG) under shock loading. The macro-response micro-fracture process impact loading can be obtained simultaneously, correlation between macroscopic mesoscale shown. crack propagation along grain boundary through...
Solids usually become harder and tougher under compression turn softer at elevated temperature. Recently, the compression-induced softening heating-induced hardening dual anomaly was predicted in group VB elements such as vanadium. Here, evidence for this counterintuitive phenomenon is reported. By using accurate high-temperature, high-pressure (HP) sound velocities measured Hugoniot states generated by shockwaves, together with first-principles calculations, we observe not only prominent...
The second-order elastic constants and stress-strain coefficients are defined, respectively, as the second derivatives of total energy first derivative stress with respect to strain. Since Lagrangian infinitesimal strain commonly used in two definitions above, separated into categories, respectively. In general, any four physical quantities is employed characterize properties materials without differentiation. Nevertheless, differences may exist among them at non-zero pressures, especially...
Abstract Due to superior mechanical and optical properties, yttrium–aluminum–garnet (YAG) is emerging as a potential transparent armor material. Its dynamic behavior, however, remains largely unexplored. In this work, both impact experiments mesoscopic simulations have been performed better understand the response of YAG polycrystalline single‐crystal ceramics. Experimental results demonstrate that two samples remarkably different behaviors with increasing shock pressure, in which Hugoniot...