NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenZeitschriftenartikel
H. Zhang, J. Sun, Y. Wang, Thomas Stirner, A. Hamid, C. Sang
Study of lattice thermal conductivity of tungsten containing bubbles by molecular dynamics simulation
Fusion Engineering and Design, vol. 161, no. December
2020
DOI: 10.1016/j.fusengdes.2020.112004
Abstract anzeigen
Exposed to high fluxes of helium/hydrogen isotope particles and heat, tungsten divertor plates will suffer damage thus degrading its performance such as its thermal conductivity. This paper presents a study on the effect of bubbles on the lattice thermal conductivity of tungsten at the atomic level using molecular dynamics simulations. The present study finds that empty bubbles in tungsten lead to a decrease in the lattice thermal conductivity of tungsten. Furthermore, He/D filled bubbles aggravate this decrease. The physical origin of this behavior is discussed. It is also found that the decrease in lattice thermal conductivity depends strongly on both the impurity density in the bubbles and the bubble size.
NachhaltigF: Elektrotechnik und MedientechnikI: IQMAZeitschriftenartikel
Q. Yang, Y.-W. You, L. Liu, H. Fan, W. Ni, D. Liu, C. Liu, Günther Benstetter, Y. Wang
Nanostructured fuzz growth on tungsten under low-energy and high-flux He irradiation
Scientific Reports (Nature Publishing Group), vol. 5, no. Article number: 10959, pp. 1-9
2015
DOI: 10.1038/srep10959
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
P. Arendt, S. Foltyn, L. Civale, R. DePaula, P. Dowden, J. Groves, T. Holesinger, Jia, Q. X., Sascha Kreiskott, L. Stan, I. Usov, H. Wang, J. Coulter
High critical current YBCO coated conductors based on IBAD MgO
Physica C: Superconductivity, vol. 412-414, no. October, pp. 795-800
2004
DOI: 10.1016/j.physc.2003.12.074
Abstract anzeigen
This report describes recent developments of second-generation Y1Ba2Cu3O7−δ (YBCO) coated conductors deposited on biaxially textured MgO templates. The materials system architecture implemented to achieve high critical currents in YBCO films is described. The average full-width at half maximum (FWHM) in-plane texture obtained for MgO films processed on meter-length tapes is 7°, while that for the YBCO films is 3°. The best YBCO in-plane values approach 2° and the out-of-plane values approach 1°. Critical currents (1 cm wide tapes, 75 K, self field) have attained 423 A for 7 cm length and 233 A for 50 cm length tapes.
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
S. Foltyn, P. Arendt, Jia, Q. X., H. Wang, MacManus-Driscoll, J. L., Sascha Kreiskott, R. DePaula, L. Stan, J. Groves, P. Dowden
Strongly coupled critical current density values achieved in Y1Ba2Cu3O7−δ coated conductors with near-single-crystal texture
Applied Physics Letters, vol. 82, no. 25, pp. 4519-4521
2003
DOI: 10.1063/1.1584783
Abstract anzeigen
One of the most intensely researched subjects in the development of YBa2Cu3O7−δ (YBCO)-based coated conductors is the methodology for achieving ever-sharper film texture on flexible metal substrates. This is a critical issue due to the intrinsic weak-link behavior that results in depressed critical current density (Jc) in polycrystalline YBCO. Using ion-beam-assisted deposition of magnesium oxide, we have achieved YBCO texture on superalloy substrates approaching that on single-crystal oxide substrates. This advance has allowed us to fabricate coated conductor samples with Jcs that are as high as for films on oxide crystals; for example, >2 MA/cm2 (75 K, self-field) at a YBCO thickness of ∼1.5 μm.
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