Process of depositing a carbon film having metallic properties

Details Process of depositing a carbon film having metallic properties Process of depositing a carbon film having metallic properties

1991-01-28

1992-05-05

Lewis, Michael L.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423446, 423449, 427249, 4272551, C01B 3102, C23C 1600

Patent

active

051105772

ABSTRACT:
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 (sp.sup.2 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.degree. with respect to its adjacent layer. The composition has a density of about 3.2 g/cm.sup.3, a bulk modulus and a hardness exceeding diamond (bulk modulus is 6.9 Mbar), and a bonding length of 1.45-1.47 angstroms.

REFERENCES:
patent: 4915977 (1990-04-01), Okamoto et al.
patent: 4935303 (1990-06-01), Ikoma et al.
patent: 4961958 (1990-10-01), Desphandey et al.
Carbon, vol. 23, No.1, "Layer Chain Carbons", (1985) pp. 3-7.

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