Results 21 to 30 of about 24,276 (294)
Crystals, 2023 The effect of tungsten, aluminum, and cobalt on the mechanical properties of iron-based composites prepared by powder technology was studied. Five samples with different contents of tungsten, aluminum, and cobalt were established.
Moustafa M. Mohammed +5 more
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Condensed Matter, 2019 Tungsten oxides play a pivotal role in a variety of modern technologies, e.g., switchable glasses, wastewater treatment, and modern gas sensors. Metallic tungsten is used as armor material, for example in gas turbines as well as future fusion power ...
Martin Köppen
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Synthesis and Properties of Vanadium Substituted Bismuth Tungstates with Fluorite-like Structure
Chimica Techno Acta, 2019 The samples of vanadium substituted bismuth tungstates with a cubic structure were obtained by solid state method. The unit cell volume of the compounds slightly contracts with increasing tungsten content and in case of vanadium doping. Thermal expansion
Olga S. Kaimieva +3 more
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Preparation and Characterization of Supported Molybdenum and Tungsten Schiff Base Complexes on MCM-41 as Nanocatalysts for the Epoxidation of Olefins [PDF]
Journal of Nanostructures, 2011 Two new heterogenized epoxidation nanocatalysts based on molybdenum and tungsten compounds were prepared withcovalent grafting of MCM-41 with 3-aminoropropyl trimethoxysilane and subsequent reaction with diphenylphosphinobenzaldehyde and complexation ...
M. Masteri-Farahani +4 more
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Materials Research Express, 2021 Joining of CuW70 composite and 0Cr18Ni9 stainless steel was successfully achieved at temperatures 1150 °C with durations from 15 to 90 min after adding a pure copper intermediate layer.
Youting Huang +7 more
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The chemistry of [h]-cycloheptatrienyl derivatives of molybdenum and tungsten
, 1993 This thesis describes the synthetic, structural and reactivity studies of η- cycloheptatrienyl-molybdenum and -tungsten chemistry. Chapter 1 presents an overview of the chemistry of η-cycloheptatrienyl derivatives of transition metals, in particular ...
Ng, Kee-Pui Dennis., Ng, Kee-Pui Dennis
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The Integrated Preparation of Porous Tungsten Gradient Materials with a Wide Porosity Range
MetalsPorous tungsten gradient materials with ordered gradient variations in pore size have significant application value in the field of vacuum electronic devices. This work combines tape casting and dealloying methods to achieve the integrated preparation of
Ke Zhu, Hao Jia, Jin Huang, Jian Zhang
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Diffusion of tungsten in chromium: Experiments and atomistic modeling [PDF]
, 2014 The solute diffusion of tungsten at low concentrations in chromium has been investigated both by experiments and computational methods. From finite-source diffusion experiments measured with an Electron Probe Micro Analyzer at temperatures from 1526 to ...
Park, Mansoo +2 more
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Advanced Engineering Materials, EarlyView.The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi +3 more
wiley +1 more source
W-Cr-C-N Nanocomposite Thin-Film Coatings via Reactive Magnetron Sputtering [PDF]
, 2011 While binary tungsten carbide can form smooth, hard films, these suffer from low fracture toughness. Tungsten nitride films are frequently harder, but are more brittle.
WALOCK, Michael J. +5 more
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