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Tantalum carbides (TaC) form a family of binary chemical compounds of tantalum and carbon with the empirical formula TaC x, where x usually varies between 0.4 and 1. They are extremely hard , brittle, refractory ceramic materials with metallic electrical conductivity .
6 C carbon (graphite) use: WEL ... tp 4489 °C (at 10.3 MPa) LNG: subl. (3915–4020) °C: 6 C carbon (diamond) use: WEL ... The bcc phase and the P-T and VT phase ...
6 C carbon (graphite) use: ... (at r.t.) 2.267 g/cm 3: CRC (near r.t.) 2.2 g/cm 3: 6 C carbon (diamond) use: ... The bcc phase and the P-T and VT phase diagrams below ...
Carbon phase diagram, based on calculations from 1980s. Newer work indicates that the melting point doesn't go above about 9000 K. Source: J.M. Zazula (1997). "On Graphite Transformations at High Temperature and Pressure Induced by Absorption of the LHC Beam". CERN. Retrieved 2010-07. Author: Trackler (talk) 13:05, 18 July 2010 (UTC) Other ...
Theoretically predicted phase diagram of carbon. The equilibrium pressure and temperature conditions for a transition between graphite and diamond is well established theoretically and experimentally. The pressure changes linearly between 1.7 GPa at 0 K and 12 GPa at 5000 K (the diamond/graphite/liquid triple point).
Diagram at J.M. Zazula, On Graphite Transformations at High Temperature and Pressure Induced by Absorption of the LHC Beam, 1997 as based on: F.P. Bundy, Pressure-Temperature Phase Diagram of Elemental Carbons, Physica A 156, 169 (1989). J. Steinback et al., A Model for Pulsed Laser Melting of Graphite, J. Appl. Phys. 58 (11), 4374 (1985). Author
The long-held view is that the carbon atoms fit into octahedral interstices in a close-packed metal lattice when the metal atom radius is greater than approximately 135 pm: [2] When the metal atoms are cubic close-packed, (ccp), then filling all of the octahedral interstices with carbon achieves 1:1 stoichiometry with the rock salt structure. [4]
Pobedit (Russian: победи́т) is a sintered carbide alloy of about 90% tungsten carbide as a hard phase, and about 10% cobalt (Co) as a binder phase, with a small amount of additional carbon. Developed in the Soviet Union in 1929, it is described as a material from which cutting tools are made.