A5080631700- Polymer Nanocomposites and Properties
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- Welding Techniques and Residual Stresses
- biodegradable polymer synthesis and properties
- NMR spectroscopy and applications
- Polymer crystallization and properties
- High-Temperature Coating Behaviors
- Advanced Welding Techniques Analysis
- Nuclear Materials and Properties
- Semiconductor materials and devices
- Integrated Circuits and Semiconductor Failure Analysis
- Titanium Alloys Microstructure and Properties
- High voltage insulation and dielectric phenomena
- Tribology and Lubrication Engineering
- Breast Cancer Treatment Studies
- Material Dynamics and Properties
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Metal Alloys Wear and Properties
- Laser Material Processing Techniques
- Silicone and Siloxane Chemistry
- Phase Equilibria and Thermodynamics
- Cancer Risks and Factors
- Force Microscopy Techniques and Applications
Guangdong Ocean University
2017-2024
West China Medical Center of Sichuan University
2024
Rensselaer Polytechnic Institute
2007-2009
Small angle neutron scattering studies on polystyrene loaded with spherical silica nanoparticles under contrast-matched conditions unequivocally show that chain conformations follow unperturbed Gaussian statistics independent of molecular weight and filler composition. Liquid state theory calculations are consistent this conclusion also predict filler-induced modification interchain polymer correlations which have a distinctive signature is in nearly quantitative agreement our observations.
Abstract The influence of cooling rates on the thermal behavior and solid‐state morphologies polyhydroxyalkanoates have been investigated. was studied by differential scanning calorimetry (DSC). crystal structures (∼ Å), lamellar (tens nanometers), fibrillar (several hundred spherulitic μm) poly (3‐hydroxybutyrate) (PHB) copolymers (3‐hydroxybutyric acid‐ co ‐3‐hydroxyvaleric acid) (PHBV) ‐3‐hydroxyhexanoic (PHBHx) crystallized under different were using simultaneous small angle X‐ray...
The effect of 60Si2Mn substrate preheating on the forming quality and mechanical properties cobalt-based tungsten carbide composite coating was investigated. Substrate divided into four classes (room temperature, 150 °C, 250 350 °C). morphology, microstructure, distribution elements were analyzed using a two-color laser handheld 3D scanner, scanning electron microscope (SEM), an energy dispersive X-ray spectrometer (EDX), respectively. hardness wear cladding layer characterized through...
A Stellite 6/WC composite coating was prepared on a 60Si2Mn substrate using the method of combing laser cladding and re-melting. The effect different re-melting powers (1400 W, 1500 W 1600 W) scanning speeds (300 mm/min, 500 mm/min 700 mm/min) geometry, microstructure, microhardness wear resistance investigated. research results show that process can improve forming quality reduce defects such as pores cracks, but any excessive power speed may result in reoccurrence defects. With increase...
The bursts of picosecond laser pulses have nanosecond-level short interval delay. These contain a variable number sub-pulses, which are used for cutting copper current collector and graphite anode material Li-ion battery anode. influences 2–10 sub-pulses on kerf edges were studied compared with that single pulse. shapes edge cut under different conditions, obtained using scanning electron microscopy (SEM), revealed burst mode would yield smaller heat-affected zone (HAZ) the delamination...
In this study, Fe/TiC composite coating was fabricated on the surface of 65Mn steel using substrate preheating combined with laser cladding technology. order to characterize impact various temperatures, four coatings were a at different temperatures (ambient temperature, 100 °C, 200 and 300 °C). The microstructures properties investigated SEM, XRD, EDS, Vickers microhardness meter, wear tester, an electrochemical workstation. research results show that angle initially increases then...
Micro welding of dissimilar metals can meet many performance requirements for modern engineering structures. In this experiment, laser micro copper-aluminum was conducted with an HWLW-300A energy negative feedback Nd:YAG pulse laser. By using the overlap method copper on aluminum, being distributed unevenly, good weld joints were obtained. paper, mechanism analyzed from aspects such as temperature and specific heat capacity solid metal. Existing defects identified, a feasible improvement...
A response surface was employed to establish a statistical model for influencing factors and targets study the influence of laser cladding process parameters on quality Co-based WC composite coating reduce defects in layer. Analysis showed that step power were most significant affecting coating’s porosity area flatness. Increasing amount significantly enhanced hardness coating. The validation experiments under optimized conditions predicted value good agreement with actual value, average...
Abstract The aim of this article is to explore the effect re-melting times on microstructure and properties Fe-based coating. In study, coating prepared 316L stainless steel by laser cladding re-melting. Meanwhile, are studied 3D scanner, Vickers microhardness tester, X-ray diffractometer, scanning electron microscope. addition, formation that analyzed numerical simulation. results show can lead decrease in height, increase width, both depth width melting pool. hardness coatings enhanced six...