Results 21 to 30 of about 271 (258)

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

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +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

External and Internal Cracking Caused by Heat Treatment in Laser Powder Bed Fusion‐Fabricated Inconel 738LC Components

Advanced Engineering Materials, EarlyView.
Manufacturing problems such as heat treatment‐induced cracking hinder the widespread application of the laser powder bed fusion (LPBF) process to superalloys. In this study, cracks in the LPBF components of Inconel 738LC superalloy are characterized after heat treatment at various temperature ranges, revealing two distinct cracking behaviors.
Kosuke Kuwabara, Masahiro Kusano, Ayako Ikeda, Toshio Osada, Makoto Watanabe   +4 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

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

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

Advanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti, Andreas Stark, Roja Rani Korrayi, Florian Pyczak, Georg Hasemann   +4 more
wiley   +1 more source