A5114858697- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Plasma Diagnostics and Applications
- Semiconductor materials and devices
- Heat Transfer Mechanisms
- Turbomachinery Performance and Optimization
- Heat Transfer and Optimization
- Copper Interconnects and Reliability
- Advanced Radiotherapy Techniques
- Electrostatic Discharge in Electronics
- Silicon and Solar Cell Technologies
- Solar Thermal and Photovoltaic Systems
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Optical Coatings and Gratings
- Vacuum and Plasma Arcs
- Advanced materials and composites
- Fossil Insects in Amber
- Fluid Dynamics and Turbulent Flows
- Metallic Glasses and Amorphous Alloys
- Dust and Plasma Wave Phenomena
- Spider Taxonomy and Behavior Studies
- Electronic Packaging and Soldering Technologies
- Thermal properties of materials
- Advanced Surface Polishing Techniques
Jilin University
2024
Harbin Medical University
2024
Max-Planck-Institut für Nachhaltige Materialien
2024
Harbin Engineering University
2019-2022
First Institute of Oceanography
2022
Ministry of Natural Resources
2022
China State Shipbuilding (China)
2021
Chinese Academy of Forestry
2018
Wuhan University of Science and Technology
2010-2016
The University of Sydney
1996-2010
Abstract Aluminum alloys play an important role in circular metallurgy due to their good recyclability and 95% energy gain when made from scrap. Their low density high strength translate linearly lower greenhouse gas emissions transportation, excellent corrosion resistance enhances product longevity. The durability of Al stems the dense barrier oxide film strongly bonded surface, preventing further degradation. However, despite decades research, individual elemental reactions influence on...
Plastic scintillators have many advantages for dosimetry in external beam radiotherapy. The current method of transmitting the scintillation light to a remote detector is through solid core optical fibre. When exposed high energy therapeutic radiotherapy this fibre subject an unwanted background signal from Cerenkov which can exceed at characteristic angles. We constructed plastic dosimeter that uses air guide transport scintillator detector. show there sufficient propagation allow be...
We have deposited boronated highly tetrahedral amorphous carbon (ta-C:B) films with low stress using a filtered cathodic vacuum arc. The sp3 fraction, hardness, and resistivity were measured as function of the ion energy found to reach maximum above 50 eV for B concentrations 2% 4%. most significant result we was that a-C:B film (sp3≊80%) (1–3 GPa) up 4% could be obtained. in predominantly (≊75%) sp2 bonded. Additionally, did not vary or fraction unlike regular ta-C films.
Abstract Amorphous carbon films prepared by filtered cathodic arc deposition have been studied electron-energy-loss spectroscopy. It is shown nitrogen concentrations in the film of up to 30at.% can be controllably introduced. For 2–3 at.% are primarily sp3 bonded, whilst with higher sp2 bonded. that substitutionally incorporated into both and networks. The presence a high fraction leads sensitivity conversion sp2−rich form 300 keV electron beam.
Elastic strain energy under some conditions provides the major contribution to total of a film growing on substrate from condensing vapour. Polycrystalline films grown with intrinsic stress induced by energetic bombardment are expected show orientations which minimize energy. Even for cubic crystal in non-hydrostatic field is function relative orientation and crystallographic axes. The Gibbs free minimized constant temperature at thermal equilibrium. In this paper we derive expressions...
Purpose: In pelvic brachytherapy treatments, the rectum is an organ at risk. The authors have developed array of scintillation dosimeters suitable for in vivo use that enables quality assurance treatment delivery and provides alert to potential radiation accidents. Ultimately, this will provide evidence direct planning dose escalation correlate with rectal response. Methods: An 16 insertable applicator has been developed. were calibrated simultaneously a custom designed circular jig before...
Carbon nitride materials have been the focus of research efforts worldwide. Most studied amorphous, with only a few groups claiming to found crystalline material. We investigate structure amorphous carbon solids produced by two different techniques: cathodic arc deposition and high dose nitrogen implantation glassy carbon. Transmission electron microscopy, energy loss spectroscopy, filtered diffraction, Rutherford backscattering, infrared, Raman spectroscopy are all used derive structural...
Stoichiometric titanium nitride (TiN) films were deposited at less than 130 °C in a new configuration of the helicon activated reactive evaporation system. An situ ellipsometer was used to monitor optical properties during growth. The film stress, lattice parameter, surface roughness, crystallite size, and preferred orientation investigated as function substrate bias hence ion energy incident species. intrinsic stress dependence on shows expected result also shown by variety materials is...
Both continuous and multilayer profiles of solar selective surfaces have been analyzed optimized. The structure having the highest photothermal efficiency has two uniform absorbing layers with antireflection different refractive index materials. Interference effects were in terms optical path length sublayers their combination. phase cancellation positions for optimized are well distributed radiation range but do not occur at wavelengths above about 2.5 μm. A study electric-field...
Micro-arcing and breakdown of the wall plasma sheath in radio frequency (RF) plasmas is studied a hollow cathode system, using Langmuir probe to measure floating potential. was induced reproducibly by controlling By dc grounding cathode, negative current can flow ground resulting higher voltage between earthed vacuum vessel. The arcing threshold potential this system vicinity 50 V. In present charging process rebuild potential, which about few tens milliseconds, much slower than microsecond...
We present a three-dimensional geometry model for tortuosity of streamlines in porous media with randomly placed cylindrical particles. The proposed is expressed as functions porosity and geometrical parameters no empirical constant. This might be helpful understanding the physical mechanism media. predictions are found to good agreement experimental data available.
We report experimental and analytical results on asymmetrical micro arcing in a RF (radio frequency) plasma. Micro arcing, resulting from high plasma potential, was found to occur only the grounded electrode for variety of surface configurations. The analytic derivation based simple time-dependent Child–Langmuir sheath model electric current continuity. that minimum potential difference one period across depends area ratio powered electrode. As increases, increases but not showed discharge...