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Mobility of tungsten clusters on tungsten surfaces
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2019Abstract We report on an accelerated molecular dynamics investigation of surface transport mechanisms on W surfaces. These mechanisms likely influence the formation of nano-fuzz in fusion plasma-facing conditions. The simulations use an embedded-atom potential to investigate the diffusion mechanisms of W clusters (Wn, n = 2–9) on W(1 1 0) and W(1 0 0)
L. Yang +3 more
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Conversion of tungsten nitride to pure tungsten
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1998The properties of W2N thin films deposited on Si, SiO2, and Ta2O5 by plasma-enhanced chemical vapor deposition, with and without an electron cyclotron resonance plasma formed SiO2 (ECR-SiO2) top layer are comparatively investigated. The ECR-SiO2 top layer can effectively promote the conversion of W2N to pure W while samples are annealed at high ...
Jun Lin +3 more
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Measurements of the Polarizability of Tungsten Adatoms on Tungsten (110) Planes
Physica Status Solidi (a), 1972It is shown that high quality room temperature field ion images can be obtained. Image contrast can be enhanced by using a Ne-Ar mixture. The enhancement is due to field adsorption of argon at room temperature. Using the room temperature FIM, one can observe the movements of individual adatoms on surface planes.
T. T. Tsong, R. J. Walko
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Reduction of tungsten oxide to tungsten metal
Metallurgical Transactions B, 1976Tungsten oxide, WO2.96, was reduced toα-W in hydrogen for various time periods over the temperature range 500°C to 900°C. Intermediate oxides were determined using X-ray diffraction analysis of the semireduced powders. Several dopant conditions were used, to find the effect on oxide structures and reaction kinetics of the usual dopants K, Si and Al ...
Theodore R. Wilken +3 more
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Relaxation of tungsten adatoms on tungsten surfaces
Physics Letters A, 1974Abstract The relaxation energy of a tungsten atom on tungsten surfaces is estimated to be about 1 eV. It seems difficult to neglect the variation of that energy in the interaction between adatoms.
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`β-Tungsten' as a tungsten oxide
Acta Crystallographica, 1954G. Hägg, N. Schönberg
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Tungsten distribution and vertical migration in soils near a typical abandoned tungsten smelter
Journal of Hazardous Materials, 2022Jing Sun, Dan Wan, Huihui Du
exaly