Results 31 to 40 of about 344,011 (306)

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

open access: yesJournal 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   +2 more
doaj   +1 more source

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

open access: yesFenmo 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   +4 more
doaj   +1 more source

Thermodynamic Properties and Equation of State for Tungsten

open access: yesCrystals, 2023
A high-temperature equation of state for tungsten was constructed in this study using experimental data on its thermodynamic properties, thermal expansion, compressibility, and bulk compression modulus. The totality of experimental data were optimized by
Nikolay V. Kozyrev, Vladimir V. Gordeev
doaj   +1 more source

Analysis of Shielding Performance of Radiation-Shielding Materials According to Particle Size and Clustering Effects

open access: yesApplied Sciences, 2021
In the field of medical radiation shielding, there is an extensive body of research on process technologies for ecofriendly shielding materials that could replace lead.
Seon-Chil Kim
doaj   +1 more source

Tungsten thermal neutron dosimeter [PDF]

open access: yes, 1969
Tungsten-185 activity, which is produced by neutron activation of tungsten-184, determines thermal neutron flux. Radiochemical separation methods and counting techniques for irradiated tungsten provide accurate determination of the radiation ...
Ball, L. L.   +2 more
core   +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]

open access: yes, 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   +3 more
core   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira   +4 more
wiley   +1 more source

Elinvar Materials: Recent Progress and Challenges

open access: yesAdvanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

Influence of microstructure and applied force on the crack initiation and propagation of tungsten electrodes for spot welding

open access: yesNihon Kikai Gakkai ronbunshu, 2018
In recent years, the electrical wiring works of automobiles and home electronics have become highly complicated, and a spot welding is being used as the interconnecting joining method.
Akira KURUMADA   +3 more
doaj   +1 more source

Accurate pointing of tungsten welding electrodes [PDF]

open access: yes, 1971
Thoriated-tungsten is pointed accurately and quickly by using sodium nitrite. Point produced is smooth and no effort is necessary to hold the tungsten rod concentric. The chemically produced point can be used several times longer than ground points. This
Ziegelmeier, P.
core   +1 more source

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