Topic
Tungsten
About: Tungsten is a research topic. Over the lifetime, 35225 publications have been published within this topic receiving 456213 citations. The topic is also known as: W & element 74.
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TL;DR: An overview of the use of tungsten-containing materials in fuel cells is presented in this paper, where the authors describe the requirements for their use as thermally stable carbon-alternative catalyst supports and Nafion ® -alternative proton conducting electrolytes.
Abstract: Tungsten-based materials can play different roles in fuel cell systems. They are the only compounds which can be used as catalysts, co-catalysts, catalyst supports and electrolytes in different types of fuels cells. In particular, tungsten-based materials fulfill the requirements for their use as thermally stable carbon-alternative catalyst supports and Nafion ® -alternative proton conducting electrolytes in fuel cells operating at intermediate temperature. In this work an overview of the use of tungsten-containing materials in fuel cells is presented.
128 citations
TL;DR: In this article, high surface area WC and β-W 2 C powders were prepared by direct isothermal carburization of WO 3 and W 2 N in CH 4 -H 2 mixtures.
127 citations
01 Mar 2006-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: In this paper, a simulation of helium implantation into single-crystalline tungsten at 0 and 300 K has been performed using non-damaging ion energies of 50, 100 and 200 eV.
Abstract: Molecular dynamics simulations of helium implantation into single-crystalline tungsten at 0 and 300 K have been performed. Non-damaging ion energies of 50, 100 and 200 eV were used. Clusters containing up to the order of 100 He atoms were formed. These clusters were nucleated athermally, via the creation of (111) crowdion interstitials and interstitial dislocation loop punching. Ruptures of He clusters were observed, but no associated ejection of W atoms.
127 citations
Patent•
07 Apr 1989TL;DR: Cobalt-bound tungsten carbide metal matrix composites having a unique microstructure are produced by consolidating partially sintered greenware under high pressures, e.g., 120,000 psi, at temperatures less than those used for conventional liquid phase sintering in a relatively short time as discussed by the authors.
Abstract: Cobalt-bound tungsten carbide metal matrix composites having a unique microstructure are produced by consolidating partially sintered greenware under high pressures, e.g., 120,000 psi, at temperatures less than those used for conventional liquid phase sintering in a relatively short time, e.g., from less than one minute to less than about one hour. The composites have a binder phase which contains less than about 80 weight percent of the tungsten found in a composite prepared from the same or similar compositions via liquid phase sintering. These composites provide cutting tools with both toughness and wear resistance which exceed that of cutting tools made from the same or similar compositions via liquid phase sintering.
127 citations
TL;DR: In this article, a modified thermal evaporation technique was used to obtain films of nanostructured WO3 with high surface roughness for gas-sensing applications.
127 citations