Results 71 to 80 of about 390,595 (315)

Thermionic Energy Conversion in the Twenty-first Century: Advances and Opportunities for Space and Terrestrial Applications

Frontiers in Mechanical Engineering, 2017
Thermionic energy conversion (TEC) is the direct conversion of heat into electricity by the mechanism of thermionic emission, the spontaneous ejection of hot electrons from a surface.
David B. Go, David B. Go, John R. Haase, John R. Haase, Jeffrey George, Jochen Mannhart, Robin Wanke, Alireza Nojeh, Robert Nemanich   +8 more
doaj   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

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, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Photon and electron induced electron emission from solid surfaces

, 2007
The emission of electrons from solid surfaces under photon and electron impact is discussed. The focus of this contribution is on the transport of electrons from their point of generation inside the solid to the surface.
Werner, Wolfgang S.M.
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RECENT RESULTS ON THE DISCREPANCY BETWEEN ELECTRON TEMPERATURE MEASUREMENTS IN HIGH TEMPERATURE PLASMAS IN JET

, 2009
The long standing disagreement between the central electron temperature measured by Thomson scattering and electron cyclotron emission (2nd harmonic, X-mode) in high performance plasmas observed in JET and TFTR is reexamined.
Ford, O.,, Figini, L.,, Johnson, Tomas,, Beurskens, M.,, Farina, D.,, Grossetti, G.,, Nowak, S.,, Sozzi, C.,, de la Luna, E.,   +8 more
core   +1 more source

Work Function Characterization of Potassium-Intercalated, Boron Nitride Doped Graphitic Petals

Frontiers in Mechanical Engineering, 2017
This paper reports on characterization techniques for electron emission from potassium-intercalated boron nitride-modified graphitic petals (GPs). Carbon-based materials offer potentially good performance in electron emission applications owing to high ...
Patrick T. McCarthy, Patrick T. McCarthy, Rajib Paul, Dmitry Zemlyanov, Ronald G. Reifenberger, Ronald G. Reifenberger, Timothy S. Fisher, Timothy S. Fisher   +7 more
doaj   +1 more source

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

The Target Material Influence on the Current Pulse during High Power Pulsed Magnetron Sputtering

Frontiers in Physics, 2017
The current-time characteristic during high power pulsed magnetron sputtering is measured under identical conditions for seventeen different target materials.
Filip Moens, Stéphanos Konstantinidis, Diederik Depla   +2 more
doaj   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

Advanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu, Xun Zhang, Jack M. Donoghue, Albert D. Smith, Rahul Unnikrishnan, Rhys Thomas, Vahid Nekouie, Jie Luo, Dongchen Hu, Michael Preuss, Philip J. Withers   +10 more
wiley   +1 more source

Incorporation of Selenium into Sol–Gel‐Derived Bioactive Glass: Influence on Glass Structure, Bioactivity, and its Selective Cytotoxicity

Advanced Engineering Materials, EarlyView.
Selenium was incorporated into a sol–gel‐derived bioactive glass to enable sustained therapeutic ion release. The selenium‐containing glass preserved bioactivity while selectively inducing cytotoxicity in osteosarcoma cells and maintaining osteoblastic viability.
Breno Rocha Barrioni, Thalita Marcolan Valverde, Talita Martins, Guilherme Mattos Jardim Costa, Alfredo Miranda de Goes, Marcello Rosa Dumont, Eduardo Henrique Martins Nunes, Marivalda de Magalhães Pereira   +7 more
wiley   +1 more source

Proceedings of eighth joint workshop on electron cyclotron emission and electron cyclotron resonance heating. Vol. 2

, 1993
The theory of electron cyclotron resonance phenomena is highly developed. The main theoretical tools are well established, generally accepted and able to give a satisfactory description of the main results obtained in electron cyclotron emission ...
Max-Planck-Institut fuer Plasmaphysik, Garching (Germany)
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