A5080611131- Metal and Thin Film Mechanics
- Advanced materials and composites
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- High-pressure geophysics and materials
- Advanced ceramic materials synthesis
- Electronic and Structural Properties of Oxides
- MXene and MAX Phase Materials
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Semiconductor materials and devices
- Pancreatic and Hepatic Oncology Research
- Nutritional Studies and Diet
- High-Temperature Coating Behaviors
- Force Microscopy Techniques and Applications
- Tribology and Wear Analysis
- Photonic and Optical Devices
- Intermetallics and Advanced Alloy Properties
- GaN-based semiconductor devices and materials
- High Entropy Alloys Studies
- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Geological and Geochemical Analysis
- Telomeres, Telomerase, and Senescence
- Nutrition and Health in Aging
Zhejiang Energy Research Institute
2021-2024
Zhejiang University
2020-2024
Sun Yat-sen Memorial Hospital
2023-2024
Sun Yat-sen University
2023-2024
Peking Union Medical College Hospital
2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Henan University of Technology
2015-2020
Capital Medical University
2018
Beijing Tian Tan Hospital
2018
Beijing University of Technology
2016
Abstract Conventional material processing approaches often achieve strengthening of materials at the cost reduced ductility. Here, we show that high-pressure and high-temperature (HPHT) treatment can help overcome strength-ductility trade-off in structural materials. We report an initially strong-yet-brittle eutectic high entropy alloy simultaneously doubling its strength to 1150 MPa tensile ductility 36% after HPHT treatment. Such synergy is attributed HPHT-induced formation a...
Objective: The objective of this study is to evaluate and compare the survival benefit safety surgery following conversion therapy versus alone in patients diagnosed with surgically resectable hepatocellular carcinoma (HCC) at China Liver Cancer Staging (CNLC) IIb/IIIa stage. Methods: A total 95 CNLC HCC were retrospectively enrolled our from November 2018 December 2022. Among them, 30 underwent followed by hepatectomy, while remaining 65 received alone. primary endpoint was recurrence-free...
Quantitative measurements of pressure gradients have been made in the pyrophyllite and magnesium oxide (MgO) pressure-transmitting mediums using large-volume cubic apparatus. The relationships along axis symmetry MgO cubes versus corresponding cell pressures established at room temperature. Our experimental results indicated that increase as increases gradient medium is about twice high same pressure. When reaches 5.5 GPa, cube 50 MPa/mm. 7.7 140 data obtained present work not only adapt to...
An anvil-preformed gasket system has been developed to extend the pressure range for widely used large volume cubic press without sacrificing sample volume. The relationship of chamber versus load this was calibrated at room temperature using transitions in Bi, Tl, and Ba. With similar volumes (8-11 mm diameter 8 length), can generate pressures up about 8.5 GPa, significantly higher than 6 which generally maximum conventional anvil-gasket system. details on optimized design are given note.
High pressure and high temperature synthesized MoB2 WB2 compacts were investigated using X-ray diffraction, energy dispersive spectroscope, scanning electron microscope, Vickers indentation test ultrasonic measurements. Experiments showed that both are phase pure with a grain size of 100–200 nm. under large loading force 49 N the hardness about 21 22 GPa, respectively. The bulk modulus shear 296 190 GPa for 349 200 through Our results indicate hard materials similar to tungsten carbide,...
The incipient plasticity of diamond is probed, and shown to result from the propagation dislocations structural phase transitions.
Generally speaking, for a semiconductor, the temperature dependence of excitonic emission corresponds to that its band gap. However, an anomalous behavior is exhibited by luminescence diamond where as increases (from 10 300 K), indirect exciton peak displays spectral-distinguishable blue shift, whereas band-gap absorption shows weak red shift. According experimental high-resolution deep-ultraviolet spectra and theoretical analysis, shift gap ascribed large Debye (ΘD ≈ 2220 which makes...
利用自行设计与集成的二级6—8型大腔体静高压装置,研究了影响八面体压腔高压发生效率的主要因素及机理,并提出了一种八面体压腔密封的简化力学模型.针对于10/4(八面体传压介质边长为10 mm,二级WC立方体增压块截角边长为4 mm)组装的实验结果发现:预密封边尺寸会显著影响八面体压腔的压力产生效率;在腔体压力为12 GPa左右时,高压发生效率随八面体MgO传压介质初始密度的增加而提高;在15 GPa以上时,影响压力产生效率的主要因素是WC增压立方块本身的强度以及加压过程中所形成密封边的尺寸及材料.
The compression behavior and stress state of nanocrystalline tungsten boride (WB) were investigated using radial x-ray diffraction (RXRD) in a diamond-anvil cell under non-hydrostatic up to 60.4 GPa. properties are analyzed lattice strain theory. Experiments conducted at beamline X17C the National Synchrotron Light Source. data yield bulk modulus that is qualitatively consistent with density functional theory calculations demonstrate WB highly incompressible material. A maximum differential...
Plastic deformation of alumina (Al2O3) under high pressure was investigated by observing the shape changes spherical particles, and near fully dense transparent bulks were prepared at around 5.5 GPa 900 °C. Through analyzing features, densities, residual micro-strain Al2O3 compacts pressures temperatures (2.0–5.5 600–1200 °C), effects plastic on sintering behavior have been demonstrated. Under compression, microscopic deviatoric stress caused grain-to-grain contact could initiate individual...
Abstract A hybrid pressure cell of pyrophyllite and magnesium oxide (HPCPM) used in large volume cubic presses is presented. In the HPCPM, a frame which made with face-centered square holes works as gaskets, heteromorphosis pressure-transmitting medium. Our experimental results indicated that pressure-generation efficiency using HPCPM was improved by about 40% than traditional without decreasing anvil truncation size (without sacrificing sample volume). The could pressurize samples 1000 mm3...
Abstract The sintering behavior and mechanical properties of cubic boron nitride (cBN) composites, using the mixture cBN–Ti3Al cBN–Ti3Al-Al as starting material respectively, were investigated under high pressure temperature (HPHT) conditions. results show that samples system have more homogeneous microstructures. Young's modulus, shear bulk modulus measured by ultrasonic measurements can reach to 782±3 GPa, 344±1 348±2 respectively. hardness increases remarkably with rising, reaches highest...