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Nano-measuring Instruments and Nano-machining Technology

Yao Junen

Strategic Study of CAE 2003, Volume 5, Issue 1,   Pages 33-37

Abstract: Conventional electron microscope is a major nano-measuring instrument.Newly developed scanning probe microscope and focused ion beam-electron beam (dual beam) equipment areBeijing Scientific Instrument R & D Center (KYKY) developed the first domestic scanning electronAccording to a survey in 1996-1997 there were 1 921 electron microscopes including 756 transmission electronmicroscopes (TEM) and 1 165 scanning electron microscopes (SEM) in China at that time.

Keywords： nanotechnology     nano-measurement     nano-machining     electron microscope     scanning probe microscope     focusedion beam-electron beam (dual beam) equipment     instrumentation    

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disrupting chemicals from water through urethane functionalization of microfiltration membranes via electronbeam irradiation

Frontiers of Environmental Science & Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11783-024-1805-6

Abstract:

● Urethane functionalities created on PES membranes via electron beam

Keywords： Surface functionalization     Electron beam irradiation     Microfiltration     Endocrine disrupting chemicals    

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Dual-Material Electron Beam Selective Melting: Hardware Development and Validation Studies Article

Chao Guo, Wenjun Ge, Feng Lin

Engineering 2015, Volume 1, Issue 1,   Pages 124-130 doi: 10.15302/J-ENG-2015013

Abstract:

Electron beam selective melting (EBSM) is an additive manufacturing technique that directly fabricatesthree-dimensional parts in a layerwise fashion by using an electron beam to scan and melt metal powderIn this study, a novel EBSM process capable of building a gradient structure with dual metal materialsmicrostructures and chemical compositions were characterized by optical microscopy, scanning microscopy, and electron

Keywords： additive manufacturing     electron beam     selective melting     gradient materials     titanium alloy     TiAl alloy    

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Effects on mechanical properties in electron beam welding of TC4 alloy by laser shock processing

LU Jinzhong, ZHANG Yongkang, KONG Dejun, REN Xudong, GE Tao, ZOU Shikun

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 478-482 doi: 10.1007/s11465-007-0083-x

Abstract: The surface of TC4 titanium alloy welding line by electron beam welding (EBW) was processed by high powerWhen power density is bigger than 1.8×10 W/cm, residual stresses of electron beam welding line occurresidual stress distribution; while laser power is bigger than 1.2×10 W/cm, the surface micro-hardness of electronbeam welding line occurs change by LSP, which improve obviously micro-hardness distribution.
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Scaling up of cluster beam deposition technology for catalysis application

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1360-1379 doi: 10.1007/s11705-021-2101-7

Abstract: Many research works have demonstrated that the combination of atomically precise cluster deposition and theoretical calculations is able to address fundamental aspects of size-effects, cluster-support interactions, and reaction mechanisms of cluster materials. Although the wet chemistry method has been widely used to synthesize nanoparticles, the gas-phase synthesis and size-selected strategy was the only method to prepare supported metal clusters with precise numbers of atoms for a long time. However, the low throughput of the physical synthesis method has severely constrained its wider adoption for catalysis applications. In this review, we introduce the latest progress on three types of cluster source which have the most promising potential for scale-up, including sputtering gas aggregation source, pulsed microplasma cluster source, and matrix assembly cluster source. While the sputtering gas aggregation source is leading ahead with a production rate of ~20 mg·h–1, the pulsed microplasma source has the smallest physical dimensions which makes it possible to compact multiple such devices into a small volume for multiplied production rate. The matrix assembly source has the shortest development history, but already show an impressive deposition rate of ~10 mg·h–1. At the end of the review, the possible routes for further throughput scale-up are envisaged.

Keywords： nanoparticle     cluster     cluster beam deposition     magnetron sputtering     heterogeneous catalysis    

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Data Mining for Mesoscopic Simulation of Electron Beam Selective Melting Article

Ya Qian, Wentao Yan, Feng Lin

Engineering 2019, Volume 5, Issue 4,   Pages 746-754 doi: 10.1016/j.eng.2019.06.006

Abstract:

In the electron beam selective melting (EBSM) process, the quality of each deposited melt track hasThe mesoscopic modeling technique was recently introduced as a means of simulating the electron beam

Keywords： Electron beam selective melting     Mesoscopic modeling     Data mining    

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Modeling and Experimental Validation of the Electron Beam Selective Melting Process

Wentao Yan, Ya Qian, Weixin Ma, Bin Zhou, Yongxing Shen, Feng Lin

Engineering 2017, Volume 3, Issue 5,   Pages 701-707 doi: 10.1016/J.ENG.2017.05.021

Abstract:

Electron beam selective melting (EBSM) is a promising additive manufacturing (AM) technology.

Keywords： Modeling     Electron beam     Additive manufacturing     Powder scale    

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Complete set technologies and equipment for 900 t simple-supported box beam construction in high-speed

Wang Qingming,Liu Linsheng

Strategic Study of CAE 2011, Volume 13, Issue 4,   Pages 75-80

Abstract:

Complete set technologies and equipment for 900 t simple supported boxbeam construction in high speed railways are introduced in this paper, including the pre fabricationtechnologies and equipment of the 900 t simple supported box beams, transport technologies and equipment, laying and erection technologies and equipment, construction technologies and equipment of the 900

Keywords： high speed railway     simple supported box beam     construction technology    

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Effects on Residual Stress of Electron Beam Welding of TC4 Al loy by Laser Phase Transformation Treatment

Lu Jinzhong,Zhang Yongkang,Kong Dejun,Ren Xudong,Zou Shikun,Wang Xichang

Strategic Study of CAE 2007, Volume 9, Issue 5,   Pages 72-76

Abstract:

  In this study,  an effective control method and strategy based on fuzzy neural network has been developed for gas injection pressure accurate control in gas-assisted injection. A fuzzy neural network controller with five layers and its control algorithm are established.  The learning ability of neural network is used to optimize the rules of the fuzzy logic so as to improve the adaptability of system.  The simulation of the system capability and three segmental injected pressure control are carried out under the environment of MATLAB and the results show that this theoretic model is feasible, and the control system has good characteristics and control action.

Keywords： laser phase transformation treatment     TC4titanium alloy     electron beam welding(EBW)     residual stress    

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Erratum to ‘‘Modeling and Experimental Validation of the Electron Beam Selective Melting Erratum

Wentao Yan, Ya Qian, Weixin Ma, Bin Zhou, Yongxing Shen, Feng Lin

Engineering 2018, Volume 4, Issue 1,   Pages 164-164 doi: 10.1016/j.eng.2017.12.012

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Processing parameter optimization of fiber laser beam welding using an ensemble of metamodels and MOABC

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0703-5

Abstract: In fiber laser beam welding (LBW), the selection of optimal processing parameters is challenging and

Keywords： laser beam welding     parameter optimization     metamodel     multi-objective    

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Application of consistent geometric decomposition theorem to dynamic finite element of 3D composite beam

Iman FATTAHI, Hamid Reza MIRDAMADI, Hamid ABDOLLAHI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 675-689 doi: 10.1007/s11709-020-0625-4

Abstract: equivalent single layer approach is utilized for dynamic finite element procedures of 3D composite beam

Keywords： composite beam     dynamic finite element     degrees of freedom coupling     experimental validation     numerical validation    

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Kinetics and mechanisms of reactions for hydrated electron with chlorinated benzenes in aqueous solution

Haixia YUAN,Huxiang PAN,Jin SHI,Hongjing LI,Wenbo DONG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 583-590 doi: 10.1007/s11783-014-0691-8

Abstract: The reactions between chlorinated benzenes (CBzs) and hydrated electron ( ) were investigated by theelectron beam (EB) and laser flash photolysis (LFP) experiments.

Keywords： chlorinated benzenes     hydrated electron     electron beam     laser flash photolysis    

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Experimental and numerical analysis of beam to column joints in steel structures

Gholamreza ABDOLLAHZADEH, Seyed Mostafa SHABANIAN

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 642-661 doi: 10.1007/s11709-017-0457-z

Abstract: as formability under extreme loads such as earthquakes are the primary challenges in the modeling of beam-to-columnand neural network methods have been presented in order to model the complex hysteresis behavior of beam-to-columntraining of the neural network, the experiments were carried out on samples with real dimensions of beam-to-columnthat the combinational modeling is able to display the complex narrowed hysteresis behavior of the beam-to-column

Keywords： beam to column connections     experiments     component method     neural network model     combinational modeling    

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The calculation of maximum bending normal stress for sandwich beam based on revised single beam theory

Hao Jingxin,Liu Wenjin and Wu Xinfeng

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 92-95

Abstract: Maximum bending normal stress is one of the important parameters to measure flexural property of sandwich beamTherefore，new methodology to calculate the stress is proposed based on the equivalent single beam theoryThe results showed that revised single beam theory (RSBT) are equivalent to multi-layer theory (MLT).When cross section of beam and maximum loading are fixed，the maximum bending normal stress calculatedaccordingly with increasing ratio of core thickness to the whole，but the result is constant for single beam

Keywords： sandwich beam     bending normal stress     single beam theory     bending property    

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Title Author Date Type Operation

Nano-measuring Instruments and Nano-machining Technology

Yao Junen

Journal Article

disrupting chemicals from water through urethane functionalization of microfiltration membranes via electronbeam irradiation

Journal Article

Dual-Material Electron Beam Selective Melting: Hardware Development and Validation Studies

Chao Guo, Wenjun Ge, Feng Lin

Journal Article

Effects on mechanical properties in electron beam welding of TC4 alloy by laser shock processing

LU Jinzhong, ZHANG Yongkang, KONG Dejun, REN Xudong, GE Tao, ZOU Shikun

Journal Article

Scaling up of cluster beam deposition technology for catalysis application

Journal Article

Data Mining for Mesoscopic Simulation of Electron Beam Selective Melting

Ya Qian, Wentao Yan, Feng Lin

Journal Article

Modeling and Experimental Validation of the Electron Beam Selective Melting Process

Wentao Yan, Ya Qian, Weixin Ma, Bin Zhou, Yongxing Shen, Feng Lin

Journal Article

Complete set technologies and equipment for 900 t simple-supported box beam construction in high-speed

Wang Qingming,Liu Linsheng

Journal Article

Effects on Residual Stress of Electron Beam Welding of TC4 Al loy by Laser Phase Transformation Treatment

Lu Jinzhong,Zhang Yongkang,Kong Dejun,Ren Xudong,Zou Shikun,Wang Xichang

Journal Article

Erratum to ‘‘Modeling and Experimental Validation of the Electron Beam Selective Melting

Wentao Yan, Ya Qian, Weixin Ma, Bin Zhou, Yongxing Shen, Feng Lin

Journal Article

Processing parameter optimization of fiber laser beam welding using an ensemble of metamodels and MOABC

Journal Article

Application of consistent geometric decomposition theorem to dynamic finite element of 3D composite beam

Iman FATTAHI, Hamid Reza MIRDAMADI, Hamid ABDOLLAHI

Journal Article

Kinetics and mechanisms of reactions for hydrated electron with chlorinated benzenes in aqueous solution

Haixia YUAN,Huxiang PAN,Jin SHI,Hongjing LI,Wenbo DONG

Journal Article

Experimental and numerical analysis of beam to column joints in steel structures

Gholamreza ABDOLLAHZADEH, Seyed Mostafa SHABANIAN

Journal Article

The calculation of maximum bending normal stress for sandwich beam based on revised single beam theory

Hao Jingxin,Liu Wenjin and Wu Xinfeng

Journal Article