Results 11 to 20 of about 1,962 (183)
Analysis of Impact of Conic Aperture in Differentially Pumped Chamber
Advances in Military Technology, 2019 The paper focuses on the simulation of medium dynamics in the environmental scanning electron microscope. In particular, the paper examines the conical aperture location effect in the differentially pumped chamber and the width of the pumping channel in this chamber.
J. Maxa, P. Hlavatá, P. Vyroubal
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Differentially pumped molecular beam extraction system to probe catalytic chemistry at ambient pressure conditions: A CFD-aided design [PDF]
AIP AdvancesWe report a design and finite element fluid-dynamics modeling of a differentially pumped molecular beam extraction system. The system relies on two stages of pumping and consists of three sections: a catalytic reactor, a differential chamber, and an ...
Satya P. Joshi +5 more
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Comparisons Using Methods of Continuum Mechanics and Monte Carlo at Differentially Pumped Chamber
Advances in Military Technology, 2016 The article deals with the analysis of gas flows in pumped canals in differential pumped chamber of the Environmental Scanning Electron Microscope (ESEM). The article compares and verifies existing results of differentially pumped chamber flow simulation from ANSYS Fluent system, which uses the mechanics of continuum, with the ones published by D ...
Maxa, Jiří +4 more
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Advanced Engineering Materials, EarlyView.This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira +4 more
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Advanced Engineering Materials, EarlyView.This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat +7 more
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Advanced Engineering Materials, EarlyView.The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee +7 more
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Results in PhysicsAn optimized, validated methodology for windowless differentially pumped gas targets is presented, combining analytical multi-regime conductance modeling, constrained Sequential least-square quadratic programming (SLSQP) optimization, Stopping and Range ...
H.R. Mirzaei +2 more
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Advanced Functional Materials, EarlyView.A novel thermos‐responsive hydroxypropyl cellulose/graphene oxide (HPC/GO) composite membrane is fabricated for reversible temperature‐gated ion transport in aqueous zinc‐ion batteries. Enabled by LCST‐driven structural transition, unimpeded ion diffusion at room temperature delivers high capacity, while elevated temperature suppresses transport; full ...
Xueli Bi +9 more
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TechnologiesThe ongoing research in Environmental Scanning Electron Microscopy (ESEM) is contributed to in this paper. Specifically, this study investigates supersonic flow in a nozzle aperture under low-pressure conditions at the continuum mechanics boundary.
Pavla Šabacká +7 more
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Advanced Functional Materials, EarlyView.Magnetic‐field‐assisted CVD of heterometallic single‐source precursors modulates thin‐film surface electronic structure and interfacial charge transfer. Field‐grown (Cobalt ferrite‐1T)CF‐1T films exhibit stabilized electronic states, lower kinetic barriers, and markedly enhanced nitrate‐to‐ammonia electrocatalysis versus (Cobalt ferrite‐0T) CF‐0T ...
Touraj Karimpour +11 more
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