A5040724695- Additive Manufacturing and 3D Printing Technologies
- Laser Material Processing Techniques
- Additive Manufacturing Materials and Processes
- Cellular and Composite Structures
- Manufacturing Process and Optimization
- Bone Tissue Engineering Materials
- Ocular and Laser Science Research
- Laser-induced spectroscopy and plasma
- Injection Molding Process and Properties
- Orbital Angular Momentum in Optics
- Surface Roughness and Optical Measurements
- Nonlinear Optical Materials Studies
- Dental materials and restorations
- Adhesion, Friction, and Surface Interactions
- Remote Sensing and Land Use
- Diamond and Carbon-based Materials Research
- Advanced Manufacturing and Logistics Optimization
- Advanced Fiber Laser Technologies
- Advanced Surface Polishing Techniques
- Photopolymerization techniques and applications
- Titanium Alloys Microstructure and Properties
- Geotechnical Engineering and Underground Structures
- Forest, Soil, and Plant Ecology in China
- Digital Holography and Microscopy
- Advanced Scientific and Engineering Studies
China Tobacco
2023-2025
National University of Defense Technology
2023-2024
Beijing Normal University
2023
Fudan University
2023
University of Manchester
2019-2022
Huazhong University of Science and Technology
2018-2022
Shandong Normal University
2020
Tibet University
2020
Weihai Science and Technology Bureau
2017
Shandong University
2017
Abstract Tungsten (W) and stainless steel (SS) are well known for the high melting point good corrosion resistance respectively. Bimetallic W–SS structures would offer potential applications in extreme environments. In this study, a SS→W→SS sandwich structure is fabricated via special laser powder bed fusion (LPBF) method based on an ultrasonic-assisted deposition mechanism. Material characterization of SS→W interface W→SS was conducted, including microstructure, element distribution, phase...
In semiconductor and data storage device manufacturing, it is desirable to produce feature sizes less than 30 nm with a high depth-to-width aspect ratio on the target material rapidly at low cost. However, optical diffraction limits smallest focused laser beam diameter around half of wavelength (λ/2). The existing approach achieving nanoscale fabrication mainly based costly extreme ultraviolet (EUV) technology operating within limit. this paper, new method shown achieve materials processing...
In this Letter, we introduce a new class of angular dependent autofocusing ring Pearcey beams by imposing cross-phase structure. Due to structure, the beam exhibits non-uniform abrupt behavior. Unlike properties without cross phase [ Opt. Lett. 43 , 3626 ( 2018 ) OPLEDP 0146-9592 10.1364/OL.43.003626 ], can flexibly adjust focal length and its focusing ability, as well direction beams, with help only Furthermore, Poynting vectors are employed demonstrate convincingly beam-focusing mechanism....
A novel method has been developed to fabricate SiC/Al composites by the combination of laser powder bed fusion (LPBF) and vacuum-pressure infiltration. The effects SiC particle size distribution pre-oxidation on microstructure properties were investigated. new phenomenon severe lamellar cracking was observed in without treatment, which can be explained terms mechanism interlayer binding. results showed that residual porosity sample treatment s higher than 3%, with a maximum (8.16 ± 0.57) %,...
In order to improve the palletising efficiency of robotic arm, a lightweight design is carried out for connecting beam, which heavier than end actuator (flexible suction cup). The three-dimensional model beam built in SolidWorks imported into abaqus static analysis and topology optimisation using Tosca module, optimised results are fe-safe fatigue analysis, redesign parts structure with higher stresses smallest life. maximum stress minimum life final significantly improved, mass finally...
To address the challenges posed by large sorting volume of cigarettes in tobacco logistics distribution centers and significant impact cigarette specification allocation on overall processing time orders, this study aims to optimize each zone enhance efficiency. A mathematical model is developed with objective minimizing similarity coefficients specifications within zone, which then solved using an enhanced genetic particle swarm dynamic clustering (GA-PSO-K) algorithm. Initially,...
In this study, glass fiber (GF)/phenol formaldehyde resin (PF)/epoxy (EP) three-phase electrical insulating composites were fabricated by selective laser sintering (SLS) additive manufacturing technology and subsequent infiltration. the composites, fibers modified a silane coupling agent (KH-550) used as reinforcements, phenol acted binder matrix, infiltrated epoxy was filler. Mechanical properties such tensile strength, bending dielectric constant, conductivity, electric breakdown strength...
Abstract SiC ceramic lattice structures (CLSs) via additive manufacturing (AM) have been recognized as potential candidates in engineering fields owing to their various merits. Compared with traditional CLSs, triply periodic minimal surface (TPMS) CLSs could possess more outstanding properties, making them promising for wider applications. Since are hard be fabricated through stereolithography techniques because of inferior light performance, the laser powder bed fusion (LPBF) process...
Variations of the properties virgin and recycled powders are still important challenges in high-temperature laser powder bed fusion, which directly affect processing parameters ultimate quality product. The key factor is aging mechanism during layer-wise infrared radiation process fusion. Therefore, evolution physico-chemical structure under different temperatures thoroughly studied this paper, proposed for polyetheretherketone powder. On one hand, can promote spheroidization particle edges...
The optical nonlinearity in polycrystalline zinc selenide (ZnSe), excited with 775 nm, 1 kHz femtosecond laser pulses was investigated via the nonlinear transmission material thickness and Z scan technique. measured two photon absorption coefficient <em>β</em> intensity dependent, inferring that reverse saturated (RSA) is also relevant during high excitation ZnSe. At low peak <em>I</em> < 5 GW cm<sup>–2</sup>, we find = 3.5 cm GW<sup>–1</sup> at nm. spectral properties of broad blueish...
High-temperature laser bed powder fusion (HT-LPBF) technology is an ideal method for processing poly-ether-ether-ketone (PEEK) implants with personalized bionic structures, but the biological inertia of PEEK limits its medical applications. In this study, we evaluated mechanical and properties a novel akermanite (AKM)/PEEK composite HT-LPBF. The results showed that tiny AKM particles are evenly attached to surface particle. delayed peak crystallization temperature stable sintering window...
Abstract Laser micro-structuring of amorphous polyether(ether)ketone (PEEK) has been demonstrated with 180 fs/1 kHz NIR (775 nm) and NUV (387 laser pulses. Significant differences in laser-material interaction is observed between the wavelengths single pulse ablation threshold found to be 2.01 ± 0.05 J cm −2 0.23 0.02 at 775 nm 387 respectively. This connected requirement for multi-photon absorption nm, where PEEK transparent, while significant linear within material bandgap occurs,...
Laser powder bed fusion (LPBF) additive manufacturing is an effective method to prepare three-dimensional ordered network titanium dioxide (TiO2) photocatalytic materials, therefore enhancing the absorption intensity of incident light and improving efficiency. However, TiO2 difficult be directly sintered by LPBF due high melting point brittleness. In this study, we prepared a polyamide 6 (PA6)-coated composite for based on dissolution precipitation polymer coating (DPPC) evaluated its...