Results 211 to 220 of about 83,965 (264)

Enhanced thermoelectric performance in Fe₂V_0.8W_0.2Al thin films: synergistic effects of chemical ordering and tungsten substitution.

J Mater Chem A Mater
Domínguez-Vázquez JM, Tenaguillo MÁ, Lohani K, Caballero-Calero O, Manzano CV, Plata JJ, Marquez AM, Cebollada A, Conca A, Martín-González M.   +9 more
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Tungsten Oxide Nanowires on Tungsten Substrates

Nano Letters, 2002
A simple method was discovered to prepare tungsten oxide nanowires directly from tungsten metal. The structure and composition of the nanowires were characterized by high resolution tunneling electron microscopy (HRTEM) and energy dispersive X-ray scattering (EDX), respectively.
Jie Liu, Gang Gu
exaly   +3 more sources

Effect of tungsten-resistant bacteria on uptake of tungsten by lettuce and tungsten speciation in plants

Journal of Hazardous Materials, 2019
Tungsten is an emerging contaminant because of its potential toxicity to humans. However, tungsten-plant-microbe interactions remains unknown. The objective of the study was to evaluate the effect of tungsten-resistant bacteria on tungsten species in plants and microbial community structure in soil. Although bacterial inoculation did not affect lettuce
Hyeop-Jo Han, Jin Hee Park
exaly   +3 more sources

Tungsten toxicity

Chemico-Biological Interactions, 2012
There is emerging evidence that tungsten has toxic health effects. We summarize the recent tungsten toxicity research in this short review. Tungsten is widely used in many commercial and military applications because it has the second highest melting temperature of any element.
Mark L Witten
exaly   +3 more sources

Tungsten and Tungsten Alloy Products

1999
Besides tungsten metal, only those alloys which were described in Chapter 6 are treated in this chapter. Alloys produced by melting metallurgy as well as the cemented carbides hardmetals) and their application are treated in Chapters 8 and 9, respectively.
Erik Lassner, Wolf-Dieter Schubert
openaire   +1 more source

Electrochemical preparation of tungsten, tungsten carbide and cemented tungsten carbide

Mineral Processing and Extractive Metallurgy, 2013
Tungsten is conventionally made by the reduction of tungsten oxide with hydrogen, tungsten carbide by the reaction of tungsten with carbon and cemented tungsten carbide by the sintering together of tungsten carbide with a metal, usually cobalt. This paper reports the electrochemical preparation of tungsten, tungsten carbide and cemented tungsten ...
D.-H. Tran-Nguyen, D. Jewell, D. J. Fray
openaire   +1 more source

Tungsten(VI) and Tungsten(V) Fluoride Complexes

Chemistry – A European Journal, 2009
AbstractWF6 reacts with phosphines R3P forming 1:1 compounds. With R=P(CH3)3 the coordination around the tungsten atom is capped trigonal prismatic, with R=P(CH3)2C6H5 the coordination is capped octahedral, as established by single‐crystal structure determinations: [(CH3)3PWF6]: a=752.5(21), b=945.7(24), c=629.8(18) pm.
Said, El-Kurdi, Abdal-Azim, Al-Terkawi, Bernd M, Schmidt, Anton, Dimitrov, Konrad, Seppelt   +4 more
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Fabrication of Tungsten and Tungsten-25%-Rhenium Tubing

Nuclear Applications, 1965
Techniques were developed for the fabrication of seamless tungsten and tungsten-25%rhenium tubing. Appropriate procedures were established for primary extrusion, re-extrusion, and warm drawing.
S. ISSEROW, J. G. HUNT, R. G. JENKINS, G. I. FRIEDMAN   +3 more
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Production of Tungsten and Tungsten Carbide Powders

Powder Metallurgy and Metal Ceramics, 2019
A method has been developed to process waste of tungsten–cobalt solid solutions by potentiostatic dissolution in phosphoric acid solutions. A dissolution mechanism depending on the electrode potential has been proposed. A technique for extracting tungsten from tungsten concentrates in chloride–metasilicate melts has been developed.
V. V. Malyshev, N. F. Kushchevska
openaire   +1 more source