Topic
Carbide
About: Carbide is a research topic. Over the lifetime, 36331 publications have been published within this topic receiving 503586 citations.
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TL;DR: Tungsten carbide has been shown to be an effective catalyst for a number of reactions that are readily catalyzed by platinum, but not at all by tungsten, and it was speculated that this behavior is due to changes in the electron distribution when carbon is added to tsungsten.
Abstract: Tungsten carbide has been shown to be an effective catalyst for a number of reactions that are readily catalyzed by platinum, but not at all by tungsten, and it was speculated that this behavior is due to changes in the electron distribution when carbon is added to tungsten. A test of this hypothesis, made by measuring the valence band x-ray photoelectron spectrum of tungsten carbide and comparing it with the spectra of tungsten and platinum, shows that, near the Fermi level, the electronic density of states of tungsten carbide more nearly resembles that of platinum than that of tungsten.
179 citations
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TL;DR: In this article, the sintering behavior of boron carbide was investigated with particular attention given to microstructure development at various stages in the process, and the effects of heating rate, firing atmosphere, and composition were used to characterize the Sintering behaviour.
Abstract: This paper reports how the sintering behavior of boron carbide was investigated with particular attention given to microstructure development at various stages in the sintering process. Hot-pressing and pressureless sintering techniques were employed and the effects of heating rate, firing atmosphere, and composition were used to characterize the sintering behavior. Pressureless sintering at temperatures up to 2300{degrees} C produces only limited densification. Microstructural coarsening is responsible for this since it leads to conditions where densification is slow. Hot-pressing and carbon additions suppressed coarsening and permitted densification to {gt} 95% of theoretical density.
179 citations
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TL;DR: A thin foil electron microscopical examination has been made of the various morphologies of M23C6 precipitates formed in an austenite matrix as discussed by the authors, including precipitation on dislocations, as stringers, as laths and at non-coherent twin boundaries.
179 citations
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TL;DR: A tunable organometallic synthesis of monodisperse iron carbide and core/shell iron/iron carbide nanoparticles displaying a high magnetization and good air-stability results in unprecedented hyperthermia properties at moderate magnetic fields, in the range of medical treatments.
Abstract: We report a tunable organometallic synthesis of monodisperse iron carbide and core/shell iron/iron carbide nanoparticles displaying a high magnetization and good air-stability. This process based on the decomposition of Fe(CO)(5) on Fe(0) seeds allows the control of the amount of carbon diffused and therefore the tuning of nanoparticles magnetic anisotropy. This results in unprecedented hyperthermia properties at moderate magnetic fields, in the range of medical treatments.
178 citations
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TL;DR: In this article, the authors evaluated the intergranular corrosion behavior of 316Ti and 321 austenitic stainless steels in relation to the influence exerted by modification of Ti, C and N concentrations.
178 citations