Ultrasharp diamond edges and points and methods of making same b

Details Ultrasharp diamond edges and points and methods of making same b Ultrasharp diamond edges and points and methods of making same b

1980-02-13

1982-03-16

Czaja, Donald E.

Abrasive tool making process, material, or composition

With inorganic material

51293, 51309, 83171, B24D 302, B24D 304

Patent

active

043198899

ABSTRACT:
An ultrasharp diamond edge or point, which may be a monocrystalline diamond cut and ground to provide an ultrasharp edge or point or a polycrystalline diamond molded from ultrafine diamond or graphite powder to form an ultrasharp edge or point is irradiated with an electron microbeam and preferably simultaneously is subjected to a controlled jet of highly purified gas in an enclosure at low temperature and low pressure to smooth out any minute irregularities and to obtain an atomic smoothness, glazing and annealing. By selectively masking the surface of the diamond edge or point or facet planes, the effect of the irradiation or jet can be confined to well defined areas.

REFERENCES:
patent: 3060781 (1962-10-01), Villalobos
patent: 3091144 (1963-05-01), Villalobos
patent: 3447366 (1969-06-01), Villalobos
patent: 3646841 (1972-03-01), Villalobos
patent: 3751780 (1973-08-01), Villalobos
patent: 3803958 (1974-04-01), Moran
patent: 4084942 (1978-04-01), Villalobos
patent: 4124690 (1978-11-01), Strong et al.
patent: 4164680 (1979-08-01), Villalobos
patent: 4174380 (1979-11-01), Strong et al.
patent: 4181505 (1980-01-01), DeVries et al.

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