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: In this article, the electrochemical stability of Pt supported on tungsten carbide has been evaluated on a carbon-based gas diffusion layer (GDL) at 80°C and compared to that of HiSpec 4000™ Pt/Vulcan XC-72R in 0.5 M H2SO4.
95 citations
TL;DR: In this article, the authors reported that lanthanum tungstate, earlier believed to be La6WO12, is in fact La28−xW4+xO54+δ, where tungsten dissolves in lanthanium sites to form a stable solid-state electrolyte, exhibiting proton conduction by hydration at intermediate temperatures.
Abstract: This is the first paper reporting that lanthanum tungstate, earlier believed to be La6WO12, is in fact La28−xW4+xO54+δ , where tungsten dissolves in lanthanum sites to form a stable solid-state electrolyte, exhibiting proton conduction by hydration at intermediate temperatures.
95 citations
TL;DR: In this paper, a new process is used to deposit nano-micro-crystalline composite diamond coatings by a two-step hot filament chemical vapor deposition (HFCVD) procedure.
95 citations
TL;DR: In this article, a vanadium precursor was fabricated by the dissolution reaction of V2O5 in H2O2 and the composite film was obtained by pre-reduction and hydrothermal treatment.
95 citations
TL;DR: In this paper, the authors determined the partitioning behavior of tungsten and molybdenum between liquid metal and silicate melt at high pressure and temperature, and found that partition coefficients vary by two orders of magnitude depending on whether metal segregated from a basaltic or peridotitic melt.
Abstract: The “excess” of siderophile elements in Earth9s mantle is a long-standing problem in understanding the evolution of Earth. Determination of the partitioning behavior of tungsten and molybdenum between liquid metal and silicate melt at high pressure and temperature shows that partition coefficients (Dmetal/silicate) vary by two orders of magnitude depending on whether metal segregated from a basaltic or peridotitic melt. This compositional dependence is likely a response to changes in the degree of polymerization of the silicate melt caused by compositional variations of the network-modifying cations Mg2+and Fe2+. Silicate melt compositional effects on partition coefficients for siderophile elements are potentially more important than the effects of high pressure and temperature.
95 citations