Production of ultra-hard particles

Details Production of ultra-hard particles Production of ultra-hard particles

1979-11-08

1981-06-23

McCarthy, Helen M.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

51307, 423446, 423466, 423496, C01B 3100

Patent

active

042750504

ABSTRACT:
The production of an ultra-hard particle composed substantially of carbon as the dominant element is taught. The ultra-hard particle is the product of the reaction of a metal carbide selected from the group consisting of Al.sub.4 C.sub.3 and Be.sub.2 C with a member selected from the group consisting of CH.sub.n X.sub.A Y.sub.(4-n)-A' C.sub.2 H.sub.n' X.sub.A' Y.sub.(6-n')-A', C.sub.2 H.sub.n" X.sub.A" Y.sub.(4-n")-A" and X.sub.2 wherein X and Y are different halogens selected from the group consisting of chlorine, bromine, iodine and fluorine, and wherein A is an integer from 0 to 4, A' is an integer from 0 to 6 and A" is an integer from 0 to 4, and wherein n is an integer from 0 to 4, n' is an integer from 0 to 6 and n" is an integer from 0 to 4, wherein A, A', A", n, n' or n" is the same integer in any particular member selected and wherein n+A=4, n'+A'= 6 and n"+A"=4.

REFERENCES:
patent: 2525830 (1950-10-01), Sailors et al.
patent: 3268457 (1966-08-01), Giardini et al.
patent: 3362788 (1968-01-01), Lauer
patent: 3630679 (1971-12-01), Angus

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