Gong Wang's research while affiliated with Chinese Academy of Sciences and other places

Publications (54)

Article
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Additive manufacturing (AM) technology uses the layer-by-layer stacking method to print parts, which simplifies the process of complex parts. The requirements for batch printing in AM are continuously growing now. In order to improve the economic and time efficiency of AM, the printing layout needs to be optimized. However, considering the diversit...
Article
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Graphene-based flexible electronics, particularly those with self-powered ability and stretchability, are greatly promising candidates in the applications of portable and wearable devices. However, complicated deformation of human body and harsh environment inevitably leads to the degradation of conductivity of wearable electronics due to the intri...
Article
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The selection of the building orientations is the key to the pretreatment stage of models for additive manufacturing (AM) technology, which plays a significant role in product accuracy, material consumption, printing layout, etc., affecting the economy and time efficiency of printing. In this paper, an automatic selection system of the building ori...
Article
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The high topological silicon carbide (SiC) ceramics can be prepared by stereolithography (SLA) combined with liquid silicon infiltration (LSI) techniques. This paper aims to enhance the performance of SiC ceramics prepared by SLA and LSI techniques via the cyclic impregnation/carbonization of the precursor of carbon source solution before LSI. The...
Article
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Triangular meshes play critical roles in many applications, such as numerical simulation and additive manufacturing. However, the triangular meshes transformed from computer-aided design models using common algorithms may have many undesirable narrow triangles, which tends to affect the downstream applications. In this paper, we proposed two algori...
Article
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3D printing has exhibited significant potential in outer space and medical implants. To use this technology in the specific high-value scenarios, 3D-printed parts need to satisfy quality-related requirements. In this article, the influence of the filament feeder operating states of 3D printer on the compressive properties of 3D-printed parts is stu...
Article
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Additive manufacturing has now entered a wide range of areas and plays an important role. There are many factors affecting the application of additive manufacturing, such as the amount of printing supplies, print product strength, print speed and so on. These factors potentially hinder the application of additive manufacturing in some typical areas...
Article
Electromagnetic absorption materials that possess efficient absorption performance and broad absorption bandwidth are needed to combat the electromagnetic interference (EMI). SiBCN ceramic-based metamaterials modified with defect-rich carbon nanofibers (CNFs) were developed by combining the additive manufacturing technique and polymer derived ceram...
Article
Stereolithography(SLA) combined with reactive melt infiltration (RMI) is an effective way to fabricate silicon carbide(SiC) ceramic components with complex shapes and high precision. The purpose of this paper is to increase the content of SiC in the sintered body and improve the properties of SiC ceramics prepared by SLA/RMI technologies by the imp...
Article
Wave-transmitting materials are a kind of multi-functional materials that protect the normal operation of communication and guidance systems of spacecraft in harsh environments. In this paper, we fabricate a broadband microwave transparent Si3N4-SiO2 composite ceramic with excellent performance through digital light processing (DLP) 3D printing tec...
Article
This paper proposed a kind of aluminum alloy powder additive manufacturing technology through surface modification of AlSi10Mg particles and digital light processing (DLP) printing. Firstly, AlSi10Mg particles were coated by styrene through suspension polymerization. The TEM results showed that the coating thickness is approximately 200 nm to 400 n...
Article
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With the development of the manufacturing industry, 3D printing has gradually become a focus of attention due to its unique advantages such as fast speed and low threshold. As an important part of the printing process, scanning path planning directly affects the quality of the molded part. Based on the existing path research, this paper proposes a...
Article
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A novel strategy to improve the interfa-cial bonding strength of 3D-printed polyether-ether-ketone components via pyrolysis reaction was developed. • Almost isotropy mechanical properties in X-Y plane and 59.8 MPa Z-direction bonding strength were reported. • Higher top layer's temperatures showed a positive influence on interlayer bonding strength...
Article
3D Printing has become a powerful technology for future advanced manufacturing, however the choice of materials with good performance is still limited. In this research, a type of hybrid photopolymer resin based on silicone epoxy with high UV curing rate and low viscosity was applied in stereolithography (SLA) technology. First, aliphatic silicone...
Article
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The in situ resource utilization of lunar regolith is of great significance for the development of planetary materials science and space manufacturing. The material extrusion deposition approach provides an advanced method for fabricating polylactide/lunar regolith simulant (PLA/CLRS-1) components. This work aims to fabricate 3D printed PLA–lunar r...
Article
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The mechanical properties of fused deposition modeling (FDM) are restricted by natural anisotropy, which hinders its wide application in fields such as aerospace engineering, where there are high strength/stiffness-to-weight ratio demands. Once the internal structure has been determined, the layer thickness and the filling mode would determine the...
Article
AlN ceramics were successfully fabricated through a joint process of digital light processing (DLP) 3D printing technology and heat treatment at 1780 °C∼1845 °C. DLP is an addictive manufacturing process, enabling the near net shape fabrication. The AlN grains in this work developed well and there were small amounts of grain-boundary phases at the...
Chapter
Nowadays, flexible manipulators have a wide range of applications, and many control methods are studied to enhance control performance for the flexible manipulators. Variable structure control (VSC) is widely used because of its high-speed regulation capability. In this paper, a simple dynamic soft variable structure control is presented. This adva...
Article
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The application of advanced ceramic materials is limited by their brittleness and complicated manufacturing methods. Three-dimensional (3D) printing has emerged as a new method for the fabrication of complex-shaped ceramics. Herein, a type of printable slurry composed of SiBCN preceramic polymers and high-volume fractions of Si3N4 whiskers (up to 6...
Article
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Smart 3D printed structural components with self-monitoring ability show potential applications in some extreme environments, such as deep-water and space. Fused deposition modeling (FDM) supplies a feasible solution, however, it is still a big challenge to print structural components with high bending and stretching mechanical properties due to th...
Article
Partially stabilized zirconia (PSZ) moulds for aluminium casting were fabricated by stereolithographic additive manufacturing via digital light processing (DLP). Green parts were fabricated on DLP equipment using curable ceramic suspension. These suspensions were studied by performing photopolymerisable and rheological characterisations. Thermograv...
Article
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Fused filament fabrication (FFF) is one of the most widely used additive manufacturing (AM) technologies and it has great potential in fabricating prototypes with complex geometry. For high quality manufacturing, monitoring the products in real time is as important as maintaining the FFF machine in the normal state. This paper introduces an approac...
Article
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Continuous fiber reinforced composites have excellent mechanical properties, but traditional processes are costly, complex to form, have a long production cycle, and are only suitable for relatively simple structures, which limits the wider application of the material. Fuse Deposition Modeling(FDM) 3D printing has the advantages of simple process,...
Article
Architectural and functional structures composed of lunar regolith-simulant CLRS-2 were fabricated via digital light processing and sintered at 1100 °C and 1150 °C under an air or argon atmosphere. This work is to investigate effects of atmosphere and temperature on mechanical properties, microstructure, and chemical composition of lunar regolith p...
Article
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Fused deposition modeling possesses great advantages in fabricating high performance composites with controllable structural designs. As such, it has attracted attention from medical, automatic, and aerospace fields. In this paper, the influence of short carbon fibers (SCFs) and the orthogonal building orientation on the flexural properties of prin...
Article
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The flame retardant modification of epoxy (EP) is of great signification for aerospace, automotive, marine, and energy industries. In this study, a series of EP composites containing different variations of phosphorus-containing polysulfone (with a phosphorus content of approximately 1.25 wt %) were obtained. The obtained EP/polysulfone composites...
Chapter
In order to meet the needs of the robot for three-dimensional (3D) reconstruction, an improved binocular vision self-calibration algorithm based on coplanar equation is presented. Binocular stereo vision model is established based on coplanar equation, and through the images of the stereo matching algorithm to find more in the image corresponding t...
Article
It is highly desirable to establish an extraterrestrial base on the moon due to its practicality and scientific significance in the future space explorations, which promotes aerospace scientists to propose many conceivable fabrication methods. Herein, we fabricated architectural and functional structures with lunar regolith simulants via digital li...
Article
Under ultra-low pressure, an electron beam is generated by the microwave electron cyclotron resonance plasma with a permanent magnet. By means of the Hall coil and Miller ampere meter, two electron current signals at the end of the extraction anode (Ia) and the sample holder (Is) were measured. The influences of discharge power, gas pressure, and a...
Article
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Solid polyphosphate(PBDP) was synthesized with respect to its use as additive flame retardant for epoxy resins. The influence of PBDP on the flame retardancy of epoxy resins was studied by UL-94 vertical burning test and pyrolysis combustion flow calorimetry (PCFC). With the addition of 20 wt% PBDP, the flame retardant epoxy resins pass a UL-94 V-0...
Article
We present a novel method to fabricate SiBCN ceramic components with complex shapes from preceramic polymers by using digital light processing (DLP) 3D printing technology in this research work. The photocurable precursor for 3D printing was prepared by blending high ceramic yield polyborosilazane with photosensitive acrylate monomers. The material...
Article
This study is conducted over a 3 × 3 time–temperature matrix on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) ceramics, and sintered bodies above 93% dense are obtained. The electron backscatter diffraction band contrast micrographs of the polished sintered samples are analysed for characterising the grain size distributions (GSDs). This study develops an algori...
Article
This study has investigated mechanical properties of perovskite-structured Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) oxygen transport membrane. The Young's modulus and fracture toughness are determined by both macroscopic-scale and microscopic-scale methods. Both three-point and ring-on-ring bending tests as macroscopic-scale methods produce broadly similar...
Article
Full-text available
This study is conducted over a 3×3 time-temperature matrix on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) ceramics, and sintered bodies above 93% dense are obtained. The electron backscatter diffraction (EBSD) band contrast micrographs of the polished sintered samples are analysed for characterising the grain size distributions. This study develops an algorith...
Article
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The sintering behaviours of undoped and 8 mol% B-site Ni-doped Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) under various conditions are systematically investigated. Ni doping increases the lattice parameter of BSCF. The grain size of the undoped BSCF increases from 1.52 to 64.8 μm with increasing sintering temperature from 900 at 1150 °C, while the grain size...
Article
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A series of polyphosphonamides (PPDA) with heteroatoms and phosphonamide structures are proposed as highly effective flame retardants in epoxy resins (EP). The PPDAs were synthesized by solution polycondensation and well characterized. The impact of the heteroatoms on the thermal properties, pyrolysis route and flammability of PPDAs and their EP co...
Conference Paper
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3D printing technology has shown more and more applicability in medication, designing and other fields for its low cost and high timeliness. PEEK (poly-ether-ether-ketone), as a typical high-performance special engineering plastic, become one of the most excellent materials to be used in 3D printing technology because of its excellent mechanical pr...
Article
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This paper herein studies subcritical crack growth (SCG) behaviour of a perovskite-structured Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) as an oxygen transport membrane material. The SCG behaviour of BSCF is evaluated by a constant load method and constant stress rate method at room temperature (RT) and 800 °C in air, respectively. The low crack velocity meas...
Article
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Turbofan engines will gradually degrade until failure occurs or life ends if without maintenance. Reliable degradation assessment and remaining useful life (RUL) estimation make sense on both aviation safety and rational maintenance decisions. This paper proposes a data-driven prognostic method on the premise of run-to-failure (RtF) data which are...
Conference Paper
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Systems in engineering field are becoming more and more complex nowadays, so how to exert maintenance support for complex systems is a critical problem. As the failure rate of most mechanical products is based on age, the replacement before the failure occurs is an effective way, by which the failure cost can be avoided, and this policy is called a...
Conference Paper
Digital safety systems used in nuclear power plants (NPPs) consist of a great number of computer-based components. The primary purpose of safety systems is to shut down the reactor when monitored variables exceed the set-points. During the operation of NPPs, the reactor must be monitored and protected at any moment; therefore it is extremely import...
Conference Paper
The thermal control system (TCS) is an important constitution of payload racks. It takes away the waste heat generated by science experiments to maintain the temperature within the accepted range. TCSs consist of components like valves, fluid pipe lines, cold plates, pumps, controllers, and interfaces with Internal Active Thermal Control System (IA...

Citations

... The techniques applied to generate alternative orientations mainly include shape feature recognition [51][52][53][54], convex hull generation [55], quaternion rotation [56,57], and triangular facet clustering [58,59]. The techniques used to select an optimal orientation mainly include deviation model [51], weighted sum model [53][54][55]57,58,60], deviation-similarity model [61], ordered weighted averaging operator [56], fuzzy aggregation operators [62,63], and double-layer priority aggregation multi-criterion decision-making [64]. Two-step approaches are generally efficient. ...
... Carbon-fiber-reinforced silicon-matrix (C/SiC) composites are widely used in aerospace structures due to their advantages of low density, high fracture toughness, and high specific strength [1][2][3][4]. Components made of C/SiC composites are inevitably subjected to dynamic loads, such as the impact of bird strikes or runway debris [5]. The high-speed loading may cause unexpected failure of the composite structures. ...
... Microwave absorbing materials/structures are widely used to decrease electric magnetic pollution in electronic industry or in daily life [1][2][3][4]. However, there applications are currently inhibited by lacking tuning capabilities, as well as limited working bandwidth [5][6][7]. ...
... In the domain of non-vision-based 3D-print monitoring, concepts have been developed, that utilize signals such as electrical current (Tlegenov et al., 2019), vibration (Li et al., 2019, Zhao et al., 2020, or acoustics (Becker et al., 2020b) to detect a failed print. Tlegenov et al. (2019) focused on monitoring the condition of the 3D-printer nozzle by examining the electric current of the extruding motors. ...
... Smart structures integrate structural and sensing components into one system that can respond to external stimuli such as light [1], humidity [2], mechanical force and deformation [3]. Such an integrated system possesses the ability to sense, react, and even adapt to its surrounding environment. ...
... Additive manufacturing, commonly known as 3D printing [1], has been widely used in industries for electronic devices, packaging, biomedicine, food industry, construction, and aerospace due to its advantages of design flexibility for producing materials with complex macroscopic shapes [2][3][4][5], eliminated use of molds and tools [6], improved energy and cost efficiencies [7,8], and limited waste production with potential of re-use raw materials. As one of the most well-established 3D printing technologies, stereolithography (SLA) has now been implemented in manufacturing industry [1]. ...
... Some people have explored this area through Bessel curves [13]. And a connected Fermat spiral area filling algorithm (CFS) [14] has also been proposed, but its study has not been deeply applied to laser marking technology and cannot be applied for complex graphics [15]. Our research aims to fill this gap in the laser marking path generation algorithm. ...
... Thanks to the low density, high specific strength, good thermal conductivity, and corrosion resistance, aluminum alloys have found a broad spectrum of applications in many key industries, ranging from aerospace to household appliances [1]., AlSi10Mg as a cast aluminum alloy benefits from proper weldability and enhanced mechanical properties owing to its near-eutectic composition [2]. In this alloy, high Si content has ameliorated the fluidity of the molten aluminum and reduced the contingency of the formation of voids and microcracks, which originate from meager wettability [3]. ...
... Though it can offer complex architectures, the mechanical, thermal, and electrical properties are unsuitable for functional applications [10]. Therefore, the default resins used in these 3D printers can be modified to produce nanocomposites with particle and fibrous reinforcements to enhance their mechanical and thermal properties [11,12]. Various applications, especially biomedical engineering, need cost-effective and high-performance solutions that can fabricate IOP Publishing doi:10.1088/1757-899X/1248/1/012003 2 the desired shapes at low cost with enhanced mechanical and chemical stability [13]. ...
... Patrick Consul and Nan Yi et al. [32,33] studied a PEEK filament with slower crystallization newly developed by Victrex and found that the extension of the crystallization time can effectively increase the interlayer fusion time, thereby increasing the interlayer strength and reducing the degree of mechanical anisotropy. Qiushi Li [34] et al. used the plasticizing effect of the small molecules produced by the POSS decomposition in the PEEK to promote the movement of the PEEK chain at the interface and produce higher interlayer strength. Although the above approaches have solved the problem of weak interlayer strength, there is still the challenge of high cost of material preparation on a large scale. ...