Superhard carbon metal

Details Superhard carbon metal Superhard carbon metal

C - Chemistry, Metallurgy

01

B

23/302, 148/2.1,

C01B 31/02 (2006.01) C01B 31/00 (2006.01) C04B 35/52 (2006.01) C23C 16/26 (2006.01) C30B 25/00 (2006.01) C30B 25/02 (2006.01) C30B 29/02 (2006.01) H01B 1/04 (2006.01)

Patent

CA 2033138

-14- Abstract of the Disclosure A superhard carbon composition, having a crystal structure cell consisting of (i) a unit cell of six carbon atoms with crystallographic hexagonal symmetry, (ii) all carbon atoms in flat three-fold coordinated configurations (sp2 bonding), and (iii) carbon atoms in layers of chains which zig-zag in a direction normal to the layers with each layer being rotated 60° with respect to its adjacent layer. The composition has a density of about 3.2 g/cm3, a bulk modulus and a hardness exceeding diamond (bulk modulus is 6.9 Mbar), and a bonding length of 1.45-1.47 angstroms. 4583L

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