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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: In this paper, the authors showed that most metal carbides or slicides can be synthesized at room temperature, by ball milling mixtures of elemental powders for some tens of hours with a vibratory mill.
Abstract: Most metal carbides or slicides may be synthesized at room temperature, by ball milling mixtures of elemental powders for some tens of hours with a vibratory mill. Both stable and metastable compounds containing a high density of defects can be obtained. In general, phases stable at low temperatures are synthesized. This observation allows us to confirm recent estimations for the maximum temperature (∼600 K) attained in these powders during mechanical alloying. Exceptions are found for some MSi2 suicides with M = titanium, iron or molybdenum for which both low- and high-temperature phases are formed.
106 citations
Book•
25 Apr 2019
TL;DR: In this paper, a thorough treatment of ultra-high temperature materials with melting points around or over 2500 °C is presented, which can be applied in various engineering devices and environmental conditions in the wide range from cryogenic to ultra high temperatures, on the basis of the latest updates in the field of physics, chemistry, nanotechnology, materials science and engineering.
Abstract: The work represents a thorough treatment of ultra-high temperature materials with melting points around or over 2500 °C. The second volume included physical (structural, thermal, electromagnetic, optical, mechanical and nuclear) and chemical (binary, ternary and multicomponent systems, solid-state diffusion, wettability, interaction with chemicals, gases and aqueous solutions) properties of refractory carbide materials: tantalum carbides (monocarbide TaC1–x and semicarbide a/b-Ta2±xC), hafnium monocarbide HfC1–x, niobium carbides (monocarbide NbC1–x and semicarbide a/b/c-Nb2±xC) and zirconium monocarbide ZrC1–x. It will be of interest to researchers, engineers, postgraduate, graduate and undergraduate students alike. The reader/user is provided with the full qualitative and quantitative assessment for the materials, which could be applied in various engineering devices and environmental conditions in the wide range from cryogenic to ultra-high temperatures, on the basis of the latest updates in the field of physics, chemistry, nanotechnology, materials science and engineering.
106 citations
TL;DR: In this article, the authors reported that the Pitting resistance for tempered condition was lower than the austenitized condition with least resistance at 550 °C. The observation was attributed to the presence of a Fe-rich surface film and massive carbide precipitation with a Cr depletion zone of 7-9 nm at carbide interface.
105 citations
TL;DR: In this paper, metal-doped molybdenum carbides were investigated as alternative catalysts for the steam reforming of methanol, and it was found that Pt doped carbide had the highest catalytic activity and selectivity among the prepared catalysts and reached 100% even at a temperature as low as 200°C.
105 citations
TL;DR: In this paper, the evolution of catalytic function of interstitial transition metal formulations as a result of bulk and surface structure modifications via alteration of synthesis and reaction conditions, specifically in the context of deoxygenation reactions, is discussed.
105 citations