Results 31 to 40 of about 402,533 (341)

Transition from tunneling to direct contact in tungsten nanojunctions [PDF]

, 2003
We apply the mechanically controllable break junctions technique to investigate the transition from tunneling to direct contact in tungsten. This transition is quite different from that of other metals and is determined by the local electronic properties
A. Correia, A. Halbritter, A.P. Sutton, B. Ludoph, C.J. Chen, E. Jurdik, G. Cross, G. Mihály, G. Rubio, H. van Kempen, J. Riedle, J.A. Torres, J.C. Cuevas, J.M. Krans, J.M. Pitarke, M. Posternak, O. I. Shklyarevskii, O. Yu. Kolesnychenko, O.Yu. Kolesnychenko, O.Yu. Kolesnychenko, P.A. Taylor, R.J.P. Keijsers, S. Ohnishi, S. Speller, S.B. Legoas, Sz. Csonka, U. Landman   +26 more
core   +2 more sources

The promotion effect of uniaxial strain on hydrogen aggregation in tungsten

Frontiers in Materials, 2023
The aggregation behavior of hydrogen (H) isotopes after low-energy plasma irradiation is particularly important for tungsten (W) in future fusion devices. Here, using the first-principles calculation, we demonstrated an interesting strain effect that may
Fang-Fei Ma, Fang-Fei Ma, Yu-Hao Li, Yu-Hao Li, Qing-Yuan Ren, Qing-Yuan Ren, Hong-Bo Zhou, Hong-Bo Zhou, Guang-Hong Lu, Guang-Hong Lu   +9 more
doaj   +1 more source

Solvent-Free Synthesis of Ultrafine Tungsten Carbide Nanoparticles-Decorated Carbon Nanosheets for Microwave Absorption

Nano-Micro Letters, 2020
Ultrafine tungsten carbide nanoparticles-decorated carbon nanosheets were successfully fabricated via a simple solvent-free strategy. The chemical composition of tungsten carbide/carbon composites can be easily manipulated by the weight ratio of ...
Y. Lian, Binhua Han, Dawei Liu, Yahui Wang, Honghong Zhao, Ping Xu, Xijiang Han, Yunchen Du   +7 more
semanticscholar   +1 more source

CCVD synthesis of carbon nanotubes with W/Co–MgO catalysts. [PDF]

, 2008
Carbon nanotubes (CNT) were synthesized from a H2–CH4 mixture with W/Co–MgO catalyst by a catalytic chemical vapour deposition (CCVD) method. Different W/Co ratios were investigated.
Datas, Lucien, Flahaut, Emmanuel, Frin, L., Landois, Périne, Laurent, Christophe, Peigney, Alain   +5 more
core   +2 more sources

Recent DIII-D progress toward validating models of tungsten erosion, re-deposition, and migration for application to next-step fusion devices

Materials Research Express, 2023
Fundamental mechanisms governing the erosion and prompt re-deposition of tungsten impurities in tokamak divertors are identified and analyzed to inform the lifetime of tungsten plasma-facing components in ITER and other future devices.
T Abrams, J G Guterl, S Abe, D C Donovan, I Bykov, C A Johnson, J H Nichols, J D Elder, D A Ennis, S D Loch, D L Rudakov, G Sinclair, C H Skinner, P C Stangeby, D M Thomas, E A Unterberg, W R Wampler   +16 more
doaj   +1 more source

Molecular dynamics analysis of primary radiation damage evolution in nickel, iron, and tungsten

He jishu, 2023
BackgroundNickel-, iron- and tungsten-based alloys are commonly used as structural materials of reactors. During their operational life, these alloys undergo intense neutron irradiation.PurposeThis study aims to analyze the post-irradiation defect ...
YING Hong, WEN Ali, ZHOU Suiru, HAI Xue, ZHANG Wenfeng, REN Cuilan, SHI Haining, HUANG Hefei   +7 more
doaj   +1 more source

Intrazeolite phototopotaxy. EXAFS analysis of precursor 8{W(CO)6}-Na56Y and photooxidation products 16(WO3)-Na56Y and 28(WO3)-Na56Y [PDF]

, 1991
The intrazeolite photooxidation chemistry of alpha-cage encapsulated hexacarbonyltungsten(0) in Na56Y with O2, denoted n{W(CO)6}-Na56Y/O2/hv, which has previously been shown to provide a novel synthetic pathway to alpha-cage located tungsten(VI) oxide ...
Bein, Thomas, Möller, Karin, Ozin, Geoffrey A., Ozkar, Saim   +3 more
core   +1 more source

Effect of trace Y2O3 on microstructure and properties of WC−6Co cemented carbides with inhomogeneous structure

Fenmo yejin jishu
Inhomogeneous structure WC−6Co cemented carbides with the different Y2O3 additions (mass fraction) were prepared by low pressure sintering. The microstructure and properties of the cemented carbides were investigated by scanning electron microscope (SEM),
TANG Yanyuan, YANG Qiumin, XU Guozuan, WANG Hongyun, ZHONG Zhiqiang   +4 more
doaj   +1 more source

Feasibility Study on Production of High-Purity Rhenium-185 by Nuclear Transmutation of Natural Tantalum

Journal of Nuclear Engineering, 2023
Rhenium-186 (Re-186) has attracted attention as a medical isotope. The feasibility of producing Re-185, the raw material for Re-186, using a fast reactor was evaluated using a continuous energy Monte Carlo code.
Yuki Tanoue, Tsugio Yokoyama, Masaki Ozawa   +2 more
doaj   +1 more source

Tungsten wire and tubing joined by nickel brazing [PDF]

, 1965
Thin tungsten wire and tungsten tubing are brazed together using a contacting coil of nickel wire heated to its melting point in an inert-gas atmosphere.

core   +1 more source