Le carbure de tantalehafnium est un composé chimique réfractaire de formule brute Ta x Hf 1x C y, que l'on peut considérer comme une solution solide de carbure de tantale et de carbure d', ces deux carbures ont des températures de fusion parmi les plus élevées des composés binaires, 3 983 °C et 3 928 °C respectivement , , et leur "alliage", de ...
Specifications Material Type Hafnium Carbide Symbol HfC Melting Point (°C) ~3,890 Theoretical Density (g/cc) Z Ratio ** Sputter RF Type of Bond Indium, Elastomer Export Control (ECCN) 1C231
Rediscovered ceramic Hafnium Carbide can withstand temperatures three times hotter than lava at 4050 celsius and could help enable hypersonic planes. Rediscovered ceramic Hafnium Carbide can withstand temperatures three times hotter than lava at .
Physical Properties. Sintered pieces, targets, powder and fiber. HfC AVAILABILITY NEWS: Flowable HAFNIUM CARBIDE POWDER (% min. and 45 microns x down) is regularly available as a byproduct from our ongoing 200 X 325 mesh HfC production in Reno, Nevada.
Spectral emittance is a key topic in the study of new compositions, depositions, and mechanical machining of materials for solar absorption and for renewable energies in general. The present work reports on the realization and testing of a new experimental facility for the measurement of directional spectral emittance in the range of –20#xA0;#x3BC;m.
Oxidation Kinetics of Hafnium Carbide in the Temperature Range of 480° to 600°C Shiro Shimada Department of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060, Japan
Hafnium carbide is the most refractory binary compound known, with a melting point over 3890 °C, and hafnium nitride is the most refractory of all known metal nitrides, with a melting point of 3310 °C.  This has led to proposals that hafnium or its carbides might be useful as construction materials that are subjected to very high temperatures.
A process for the manufacture of optically active compounds comprising: reacting a mesoepoxide with azidotrimethylsilane and a compound of the formula R'X, where R' is an optionally substituted hydrocarbyl and X is selected from the group consisting of Cl, Br and I; to produce a compound of the formula (1) wherein: R is optionally substituted hydrocarbyl, or both together can form a ring; in ...
Apr 29, 2014· Department of Commerce Export Controls. Metals in particle sizes of less than 60µm (in most shapes) made from 99% or more zirconium, magnesium, and alloys of these metals, whether or not encapsulated, are controlled by 1C011, along with certain boron .
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A carbothermal method was used to produce hafnium carbide from HfCl 4 and citric acid. Hafnium carbide formation started at 1000 °C. The comparatively low reaction temperature is attributed to an intimate, atomic level, mixing of Hf and carbon which is achieved by gelation of water solution of the precursors. Increase in temperature resulted in an increase in volume fraction of formed hafnium carbide.