Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Tantalum carbides (TaC) form a family of binary chemical compounds of tantalum and carbon with the empirical formula TaCx, where x usually varies between 0.4 and 1. They are extremely hard, brittle, refractory ceramic materials with metallic electrical conductivity. They appear as brown-gray powders, which are usually processed by sintering.
Being important cermet materials, tantalum carbides are commercially used in tool bits for cutting applications and are sometimes added to tungsten carbide alloys.[5]
The melting points of tantalum carbides was previously estimated to be about 3,880 °C (4,150 K; 7,020 °F) depending on the purity and measurement conditions; this value is among the highest for binary compounds.[6][7] And only tantalum hafnium carbide was estimated to have a higher melting point of 3,942 °C (4,215 K; 7,128 °F).[8] However new tests have conclusively proven that TaC actually has a melting point of 3,768 °C and both tantalum hafnium carbide and hafnium carbide have higher melting points.[9]
^ abcdLide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
^ abUS 5196273, Tsantrizos, Peter; Mavropoulos, Lakis T. & Shanker, Kartik et al., "Tantalum carbide composite materials", published 1993-03-23, assigned to Noranda Inc.
^Cedillos-Barraza, Omar; Manara, Dario; Boboridis, K.; Watkins, Tyson; Grasso, Salvatore; Jayaseelan, Daniel D.; Konings, Rudy J. M.; Reece, Michael J.; Lee, William E. (2016). "Investigating the highest melting temperature materials: A laser melting study of the TaC-HFC system". Scientific Reports. 6: 37962. Bibcode:2016NatSR...637962C. doi:10.1038/srep37962. PMC 5131352. PMID 27905481.
^Tantalum carbide in Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD) (retrieved 2014-07-02)
^Emsley, John (11 August 2003). Nature's building blocks: an A-Z guide to the elements. Oxford University Press. pp. 421–. ISBN 978-0-19-850340-8. Retrieved 2 May 2011.
^The claim of melting point of 4,000 °C (4,270 K; 7,230 °F) in TaC0.89 is based not on actual measurement but on an extrapolation of the phase diagram, using an analogy with NbC, see Emeléus
^Emeléus, Harry (1968). Advances in Inorganic Chemistry and Radiochemistry. Academic Press. pp. 174–176. ISBN 978-0-12-023611-4. Retrieved 3 May 2011.
^Agte, C.; Alterthum, H. (1930). "Researches on Systems with Carbides at High Melting Point and Contributions to the Problem of Carbon Fusion". Zeitschrift für technische Physik. 11: 182–191. ISSN 0373-0093.
^"New record set for world's most heat resistant material".
Tantalumcarbides (TaC) form a family of binary chemical compounds of tantalum and carbon with the empirical formula TaCx, where x usually varies between...
Tantalum hafnium carbide is a refractory chemical compound with a general formula TaxHfyCx+y, which can be considered as a solid solution of tantalum...
higher melting point of 3,958 °C exceeding those of tantalumcarbide and tantalum hafnium carbide which were both previously estimated to be higher. However...
structures of the metals and their carbides. (N.B. the body centered cubic structure adopted by vanadium, niobium, tantalum, chromium, molybdenum and tungsten...
hardest known compounds of tantalum are nitrides and carbides. Tantalumcarbide, TaC, like the more commonly used tungsten carbide, is a hard ceramic that...
of carbide cemented into a composite by a binder metal. Cemented carbides commonly use tungsten carbide (WC), titanium carbide (TiC), or tantalum carbide...
zirconium carbide and tantalumcarbide is an important cermet material.[citation needed] Hafnium-free zirconium carbide and niobium carbide can be used...
a rare mineral of tantalumcarbide with formula TaC. With a molecular weight of 192.96 g/mol, its primary constituents are tantalum (93.78%) and carbon...
Molybdenum carbide is an extremely hard, refractory, ceramic material, commercially used in tool bits for cutting tools. There are at least three reported...
titanium, niobium, or tantalum, which form titanium carbide, niobium carbide and tantalumcarbide preferentially to chromium carbide, by lowering the content...
alloy tool steels, ceramics or cemented carbides (such as tungsten carbide or tantalumcarbide). Often the carbide has a hardness of 1500 Vickers hardness...
used can be e.g. tantalum diboride, titanium diboride, zirconium diboride, niobium diboride, tantalumcarbide, zirconium carbide, tantalum nitride, and zirconium...
elements (including tungsten and carbon) and a few compounds (including tantalumcarbide) have higher melting points. All thorium compounds, including the dioxide...
Niobium carbide (NbC and Nb2C) is an extremely hard refractory ceramic material, commercially used in tool bits for cutting tools. It is usually processed...
element similar to tantalum in 1801 and named it columbium. In 1809, English chemist William Hyde Wollaston wrongly concluded that tantalum and columbium were...
as in fishing weights, dart tips and golf club heads. Like tantalumcarbide, tungsten carbide possesses hardness and wear resistance properties and is frequently...
sometimes given as a soothing gel to children TaC, chemical formula for Tantalumcarbide tac, a Linux command that concatenates lines in reverse, named by analogy...
Bayarjargal, Lkhamsuren (2011). "Synthesis of Binary Transition Metal Nitrides, Carbides and Borides from the Elements in the Laser-Heated Diamond Anvil Cell and...
on the thermal decomposition of tantalumcarbide. In the developed source, carbon is loaded into a thin-walled tantalum tube. After being sealed, it is...
than other direct heating designs by using a retained seed (tantalumcarbide or hafnium carbide) approach. The propellant flows through the porous walls...
2327), manufactures a broad selection of capacitor technologies such as tantalum, aluminum, multilayer ceramic, film, paper, polymer electrolytic, and supercapacitors...
2013 Nissen, Nils F.; Reinhold, Julia (2021). "Recyclability of Tungsten, Tantalum and Neodymium from Smartphones". In Inoue, M.; Fukushige, S. (eds.). EcoDesign...
the fifth period (niobium and molybdenum) and three of the sixth period (tantalum, tungsten, and rhenium). They all share some properties, including a melting...
compound known, with a melting point of 3890 °C. The ternary compound tantalum hafnium carbide has one of the highest melting points of all known compounds (4215 °C)...
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