Results 61 to 70 of about 675,095 (343)
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
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Analysis of emissions from prebunched electron beams
Physical Review Accelerators and Beams, 2017 The emissions of the prebunched electron beam, including the coherent spontaneous emission and the self-amplified stimulated emission, are analyzed by using one-dimensional FEL theory.
Jia Qika
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Effect of dielectrics on the field emission characteristics in the diode system modeling
Results in Physics, 2021 In this article diode emission system with dielectrics on the field emitter basis is simulated. The diode system is a rotationally symmetrical electron gun with a field emission cathode on a flat substrate and a flat anode parallel to the substrate.
E.M. Vinogradova, N.V. Egorov
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Coherent field emission image of graphene predicted with a microscopic theory
, 2011 Electrons in the mono-layer atomic sheet of graphene have a long coherence length of the order of micrometers. We will show that this coherence is transmitted into the vacuum via electric field assisted electron emission from the graphene edge.
Kreuzer, H. J. +2 more
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Advanced Engineering Materials, EarlyView.This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani +2 more
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Advanced Engineering Materials, EarlyView.Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller +6 more
wiley +1 more source
Parametrically Optimized Carbon Nanotube-Coated Cold Cathode Spindt Arrays
Nanomaterials, 2017 Here, we investigate, through parametrically optimized macroscale simulations, the field electron emission from arrays of carbon nanotube (CNT)-coated Spindts towards the development of an emerging class of novel vacuum electron devices.
Xuesong Yuan +5 more
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AIP Advances, 2020 In this paper, we report synthesis of nano-crystalline diamond (n-C diamond) films using DC-plasma assisted hot filament chemical vapor deposition.
S. K. Kolekar +3 more
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Advanced Engineering Materials, EarlyView.High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin +4 more
wiley +1 more source
Near field emission scanning electron microscopy [PDF]
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena, 2009 The authors report on the development of a “near field emission scanning electron microscope.” In this instrument electrons are excited from the sample surface after undergoing interactions with a primary beam of electrons field emitted from a polycrystalline tungsten tip.
T. L. Kirk, U. Ramsperger, D. Pescia
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