Method for enhancing the toughness of CVD diamond

Details Method for enhancing the toughness of CVD diamond Method for enhancing the toughness of CVD diamond

1994-05-05

1995-09-19

King, Roy V.

Coating processes

With post-treatment of coating or coating material

Heating or drying

427249, 427122, 423446, 428408, B05D 302

Patent

active

054514304

ABSTRACT:
A stress relieved CVD diamond is produced by annealing said CVD diamond at a temperature above about 1100 to about 2200 degrees Centigrade in a non-oxidizing atmosphere at a low pressure or vacuum and for a suitable short period of time which decreases with increasing annealing temperature so as to prevent graphitization of said diamond.

REFERENCES:
patent: 4124690 (1978-11-01), Strong et al.
patent: 4174380 (1979-11-01), Strong et al.
patent: 5110579 (1992-05-01), Anthony et al.
"Graphitization of diamond at zero pressure and at a high pressure". By G. Davies and T. Evans, Proc. R. Soc. Lond. A. 328 (1972) pp. 413-427.
"Plastic Deformation and Work-Hardening of Diamond". by R. C. DeVries, Mat. Res. Bull. vol. 10, (1975), pp. 1193-1200.
Mori et al, "Surface Characteristics of synthesized diamond and the effect of surface treatment on surface transformations" Appl. Surf. Sci., 56-58) 1992, pp. 89-93.
Lewis et al, "High temperature graphitization of diamond", Proc. Electrochem. Soc., 91-8, 1991 pp. 455-462.

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