Results 21 to 30 of about 270 (258)

The symmetry of the boron buckyball and a related boron nanotube [PDF]

Chemical Physics Letters, 2010
We investigate the symmetry of the boron buckyball and a related boron nanotube. Using large-scale ab-initio calculations up to second-order Møller Plesset perturbation theory, we have determined unambiguously the equilibrium geometry/symmetry of two structurally related boron clusters: the B80 fullerene and the finite-length (5,0) boron nanotube.
Szwacki, N. Gonzalez, Tymczak, C. J.
openaire   +2 more sources

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

First result of boronization assisted by the ICWC on EAST with full metal wall

Nuclear Fusion
Boron (B), a low- Z (atomic number) material, has been widely utilized in wall conditioning to improve plasma performance in fusion devices (Winter et al 1989 J. Nucl. Mater. 162 713–23). In 2023, boronization was successfully conducted on EAST featuring
Y.H. Guan, G.Z. Zuo, W. Xu, Y.W. Yu, Z. Sun, Z. Wang, R. Ding, L. Zhang, T. Zhang, Z.W. Wu, S.T. Mao, H.L. Zhao, T.Q. Jia, S.A. Puyang, L. Wang, T. Wauters, X.Z. Gong, J.S. Hu   +17 more
doaj   +1 more source

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +1 more source

Resistance Rapid Heating of Aluminum Coatings in an Extreme High Vacuum–Adequate Atmosphere for Hot Stamping

Advanced Engineering Materials, EarlyView.
The subject of this work is the development of a corrosion‐protective coating on steel sheets for form hardening. Rapid heating in an extreme high vacuum (XHV)‐adequate atmosphere is a useful method to prevent oxidation during alloying of 22MnB5 and aluminum to obtain a metallurgical bonding.
Lorenz Albracht, Alexander Schnettger, Ulrich Holländer, Sven Hübner, Bernd‐Arno Behrens, Hans Jürgen Maier   +5 more
wiley   +1 more source

Evolution of hydrogen isotopes retention behavior of in-situ boronization films in EAST

Nuclear Fusion
Effective management of hydrogen isotopes retention in plasma-facing materials (PFMs) is crucial, particularly when utilizing tritium (T) as fuel, for the success of burning plasma operations.
S.A. Puyang, Y.P. Xu, Y.H. Guan, Z.S. Yang, F. Ding, H.S. Zhou, G.Z. Zuo, J.S Hu, G.-N. Luo, the EAST Team   +9 more
doaj   +1 more source

Integrated modeling of boron powder injection for real-time plasma-facing component conditioning

Nuclear Materials and Energy
An integrated modeling framework for investigating the application of solid boron (B) powder injection for real-time surface conditioning of plasma-facing components (PFCs) in tokamak environments is presented.
F. Effenberg, K. Schmid, F. Nespoli, A. Bortolon, Y. Feng, B.A. Grierson, J.D. Lore, R. Maingi, D.L. Rudakov   +8 more
doaj   +1 more source

Boron transport simulation using the ERO2.0 code for real-time wall conditioning in the large helical device

Nuclear Materials and Energy, 2020
The three-dimensional Monte-Carlo impurity transport and plasma surface interaction code ERO2.0 is applied to a full-torus model for the Large Helical Device (LHD).
M. Shoji, G. Kawamura, J. Romazanov, A. Kirschner, A. Eksaeva, D. Borodin, S. Masuzaki, S. Brezinsek   +7 more
doaj   +1 more source

Interpretive modelling of boron transport in the boundary plasma of WEST experiments with the impurity powder dropper

Nuclear Fusion, 2023
Boron (B) powder injection is a potential alternative to glow discharge boronization as a wall conditioning method for tokamaks. This technique is currently being studied in WEST experiments, during which B powder is injected by an Impurity Powder ...
K. Afonin, A. Gallo, Y. Marandet, Ph. Moreau, G. Bodner, H. Bufferand, G. Ciraolo, C. Desgranges, P. Devynck, A. Diallo, J. Gaspar, C. Guillemaut, R. Guirlet, J.-P. Gunn, N. Fedorczak, T. Loarer, R. Lunsford, P. Manas, F. Nespoli, N. Rivals, P. Tamain, E.A. Unterberg, the WEST Team   +22 more
doaj   +1 more source

Characterization of the impurity features deposited on the boronization tungsten tiles exposed in KSTAR tokamak using laser-induced breakdown spectroscopy

Nuclear Materials and Energy, 2022
Boronization is an important wall conditioning procedure for realizing the steady-state high performance operation of tokamaks such as KSTAR and ITER. The measurement of boron and its distribution on the first wall and divertor has a significant impact ...
Liying Sun, Ding Wu, Cong Li, Jing Wu, Suk-Ho Hong, Eunnam Bang, Zhenhua Hu, Fang Ding, Guangnan Luo, Hongbin Ding   +9 more
doaj   +1 more source