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Graphene Aerogel Composites with Self‑Organized Nanowires‑Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 533-547页

作者： Xiao You Huiying Ouyang Ruixiang Deng.Qiuqi Zhang Zhenzhong Xing Xiaowu Chen Qingliang Shan Jinshan Yang Shaoming Dong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory of Inorganic Coating materials CAS Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Structural Ceramics and Composites eng.neering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of materials sci.nce and Optoelectronics eng.neering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China school of Physical sci.nce and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China school of materials sci.nce and eng.neering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China university of Chinese Academy of sci.nces Beijing 100039People’s Republic of China

With vigorous developments in nanotechnology,the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave ***,a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss *** macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires(SiC_(nws))grown in situ,while boron nitride(BN)interfacial structure is introduced on graphene *** unique composite structure forces multiple scattering of incident EMWs,ensuring the combined effects of interfacial polarization,conduction networks,and magnetic-dielectric ***,the as-prepared composites present a minimum reflection loss value of−37.8 dB and a wide effective absorption bandwidth(EAB)of 9.2 GHz(from 8.8 to 18.0 GHz)at 2.5 ***,relying on the intrinsic high-temperature resistance of SiC_(nws) and BN,the EAB also remains above 5.0 GHz after annealing in air environment at 600℃ for 10 h.

关键词： Hierarchical porous structure Interface High-temperature resistance Graphene aerogel composites Electromagnetic wave absorption

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Recent Advances in Fibrous materials for Hydroelectricity Generation

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Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge Duo Xu Xiao Feng.Xing Yang Zheheng.Song Yuhang Song Jingyu Chen Yingcun Liu Chong Gao Yong Du Zhe Sun Weilin Xu Jian Fang College of Textile and Clothing eng.neering Soochow UniversitySuzhou 215123People’s Republic of China National eng.neering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer eng.neering University of MassachusettsAmherstMA 01003USA Department of materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile sci.nce and eng.neering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China school of materials sci.nce and eng.neering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challeng.s are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

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Surface Modification of Hydroxyapatite by Using γ-aminopropyl Silane

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Journal of Wuhan university of Technology(materials sci.nce) 2001年第3期16卷 37-38页

作者：张胜民 school of materials sci. and eng. Wuhan University of Technology Wuhan 430070 China

Surface modification of hydroxyapatite(HA)powder was performedwith r-aminopropyl silane in toluent solvent. The modificationeffects were characterized by using XPS and FT-IR methods. Theresults indi- cated that the P2p electron binding energy of themodified HA decrease 0.4 eV compared to that of HA. Further- more, anew peak, 998 cm^-1 absorption appeared in IR differential spectra ofmodified HA and HA, which is due to a stretching vibration ofstructure P-O-Si, meaning that a direct covalent bonding betweenhydroxyl group on HA surface and the organic silane molecule wasrealized after modification, and the chemical bonding type was P-O-Si.

关键词： Biomaterial hydroxyapatite surface modification

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EXPERIMENTS AND SIMULATIONS OF A NEW DEVELOPED FORMING TECHNOLOGY-SHEAR-EXTRUSION PROCESS OF COMPONENTS WITH BRANCHES

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Acta Metallurgica Sinica(eng.ish Letters) 2001年第3期14卷 212-218页

作者： H.L. Yang, D.C. Kang, Z.L. Zhang, X.H. Piao and Z.D. Shi (National Die and Mold CAD eng.neering Research Center, shanghai Jiaotong university, shanghai 200030, China) (school of materials sci. & eng., Harbin Institute of Technology, Harbin 150001, China) National Die and Mold CAD eng.neering Research Center Shanghai Jiaotong University school of materials sci. & eng. Harbin Institute of Technology

Shear-extrusion process and its forming parameters are proposed, whilst its laborsaving characteristic is utilized to forge large-size shutoff valve bodies on the middle-due press. This new process is intended for the manufacture of large-size forged tubular components with branches on the middle-due press. Experiments are carried out and processing parameters are obtained regarding the shear- extrusion process of a large-size shutoff valve body. Deformation and metal flow in the shear- extrusion process are investigated. In order to verify the laborsaving characteristic of this new process, some contrast experiments of extrusion force are performed between shear-extrusion and upsetting-extrusion for forming tubular components with branches. Based on rigid-plastic FEM, a plane-strain model is established to analyze shear-extrusion process of tubular components with branches. The analysis results by 2-dimensions FEM are comparatively well consistent with experimental results. Both simulated and experimental results show that this new forming process is feasible for forging large-size tubular components with branches on the middle-due press.

关键词： Metal extrusion Shearing Simulation Tubular steel structures

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Predication of Plastic Flow Characteristics in Ferrite/Pearlite Steel Using a Fern Unit Cell Method

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上海交通大学学报 2004年第z2期38卷 61-66页

作者： Hong Li Jingtao Han Jing Liu Lv Zhang school of Material sci. & eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China

The flow stress of ferrite/pearlite steel under uni-axial tension was simulated with finite element method (FEM) by applying commercial software MARC/MENTAT. Flow stress curves of ferrite/pearlite steels were calculated based on unit cell model. The effects of volume fraction, distribution and the aspect ratio of pearlite on tensile properties have been investigated.

关键词： ferrite/pearlite steel unit cell flow curve finite element method simulation

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Aligned Solidification Structure of the MnBi Phase in Semisolidified Bi-Mn Alloy with a Static Magnetic Field

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Journal of materials sci.nce & Technology 2004年第3期20卷 311-314页

作者： Zhongming REN Hui WANG Kang Deng.Kuangdi XU Department of materials sci.nce and eng.neerng,shanghai university,shanghai 200072, China Dept. of Mat. sci. and eng. Shanghai Univ. Shanghai 200072 China

The solidification structure of Bi-3 wt pct Mn alloy grown up in the semisolid zone under the influence of a staticmagnetic field (up to 1.0 T) and the relation of the magnetic property with the solidification structure have beeninvestigated experimentally. It was shown that the primary phase MnBi crystals in the alloy aligned and oriented alongthe direction of the applied magnetic field. The orientating tendency and the average leng.h of the elongated MnBicrystals increased with the increase of the applied field and the solidification time. Moreover, the remanence of thealloy along the aligned direction of the MnBi phase in the case of solidification with a magnetic field was apparentlyanisotropic and nearly double of that without the magnetic field. This indicated that the MnBi crystals orientedand aligned along their easy magnetization axis. A model was proposed to explain the alignment and orientationgrowth of the MnBi crystals in a magnetic field in terms of the magnetic anisotropy of the crystals and the magneticinteraction between them.

关键词： Magnetic field Bi-Mn alloy MnBi Solidification

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Multi-strategies in Case Based Design Knowledge Management on Web

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Journal of Donghua university(eng.ish Edition) 2003年第1期20卷 94-99页

作者：刘溪涓王英林蒋寿伟 school of Mechanical eng.neering Shanghai Jiaotong University Shanghai 200030 Depart of Comput. sci. and eng. Shanghai Jiaotong University Shanghai 200030

Design knowledge management is very important toimprove the design process performance. The casebased design (CBD) is a methodology to followmankind's problem solving strategy, one of its aims isto realize the design knowledge reuse. This methodhas been used in many fields, but there are still somedifficulties that hindered its application. The first isabout the difficulty in the formalization of a designcase, especially representation of some experiencesthat was the weakness in former researches. The second is about the bottleneck of knowledge-acqulsition that results in lacking enough knowledge in the modification *** may lead to unreliable results when automatic inference is *** proposed that modification should be done not by machines but by designers while the inference results can be used as a suggestion to *** this manner we integrated both *** and rule-based methodologies *** third difficulty relates to case evolution and *** CBD systems suffered from this *** proposed an agile case-template technique that overcomes the problem *** make users be able to define their own similarity rules we allow users to choose different parameter weights and fuzzy subjection functions of numeric *** approach of this paper has been applied to an enterprise and the system is built on the Web.

关键词： Design knowledge management CBD Knowledge reuse

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Effects of Melt Thermal Treatment on A356 Alloy

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Journal of materials sci.nce & Technology 2003年第2期19卷 152-154页

作者： Jun WANG, Shuxian HE, Baode SUN and Yaohe ZHOUschool of materials sci.nce and eng.neering, shanghai Jiao Tong university, shanghai 200030, China Sch. of Mat. sci. and eng. Shanghai Jiaotong Univ. Shanghai 200030 China

To increase the casting quality of hypoeutectic Al-Si alloys, the effects of melt thermal treatment on the solidification structure of the A356 alloy were analyzed by a factorial experiment, in which the overheated melt was mixed with the low temperature melt. Experimental results show that the elongation ratio and streng.h of the treated samples increase remarkably compared with the control sample. The primary dendrite size reduces dramatically and the dendrite changes from columnar to equiaxed, with a little change of the secondary dendrite arm spacing (SDAS). Combined with the measurement of the nucleation undercooling, it is concluded that the solidification structure and refining effect are dependent primarily on the low temperature melt. The refining mechanism is believed as a result of the multiplication of the nuclei in the melt thermal treatment procedure.

关键词： A356 Melt thermal treatment Solidification structure

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Electromagnetic Filtration of Primary Fe-Rich Phases from Al-Si Alloy Melt

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Journal of materials sci.nce & Technology 2001年第3期17卷 306-310页

作者： Zhenming XU, Tianxiao LI, Da SHU and Yaohe ZHOU school of materials sci.nce and eng.neering, shanghai Jiaotong university, shanghai 200030, China E-mail: zmxu@*** Sch. of Mat. sci. and eng. Shanghai Jiaotong Univ. Shanghai 200030 China

Electromagnetic filtration of primary Fe-rich phases (complex compound of AlFeSiMn) from Al-Si alloy melt containing 1.2 wt pct Fe have been studied by theoretical analysis and on a self-designed electromagnetic filtration equipment. The principle of the electromagnetic filtration is that the EMF (electromagnetic force) scarcely acts on the primary Fe-rich phases having low electric conductivity, which are then moved in the direction opposite to that of the EMF. Experimental results show that the primary Fe-rich phases are separated from Al-Si alloy melt and are collected in the filter while the melt is in horizontal flow. The removal efficiency of the primary iron-phases (77) calculated is less as the greatest flow velocity of the melt (UM) and the height of the filter (2h) are larger, while it becomes larger as EMF, operating distance of electromagnetic force (cr) and particle size (dv) become larger. It has been confirmed that the primary iron-phases larger than 20 jim can be removed efficiently by theoretical analysis and experiments. This new technique is high efficient and available for continuously flowing melts as compared with natural settling and filtration methods, which offer a possibility for recycling high quality aluminum alloys.

关键词： Fe Al Electromagnetic Filtration of Primary Fe-Rich Phases from Al-Si Alloy Melt Si

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Superelasticity of TiPdNi Alloys with and without Rare Earth Ce Addition

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Journal of materials sci.nce & Technology 2003年第2期19卷 179-182页

作者： Qingchao TIAN, Jiansheng.WU and Yifeng.CHeng.ey Laboratory of the Ministry of Education for High Temperature materials and Tests, school of materials sci.nce and eng.neering, shanghai Jiao Tong Univ., shanghai 200030, China Sch. of Mat. sci. and eng. Shanghai Jiaotong Univ. Shanghai 200030 China

Ti50.6Pd30Ni19.4 and Ti51Pd28Ni21 (Ce) alloys have been prepared under various temperatures for long time annealing. Differential scanning calorimetery (DSC), X-ray diffraction (XRD) and tensile test were employed to investigate the phase transformation behavior and superelasticity of the alloys. It has been found that the phase transformation temperature of Ti50.6Pd30Ni19.4 is about 40C higher than that of Ti51Pd28Ni21(Ce), and do not change much with different annealed temperature. Obvious superelasticity is retained in Ti50.6Pd30Ni19.4 alloy annealed at 400C for 18 h, and annealing at higher temperature shows a deterioration of this property. The Ce addition in TisiPd28Ni2i alloy significantly delays recrystallization, increases yied streng.h and elastic modulus, but the superelasticity is poor.

关键词： TiNi-Pd Shape memory alloy Superelasticity

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