Fabrication of boron articles

Details Fabrication of boron articles Fabrication of boron articles

1974-09-30

1976-08-24

Schafer, Richard E.

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Autogenously or by activation of dry coated particles

75226, 176 93BP, 264332, B29J 100

Patent

active

039767353

ABSTRACT:
This invention is directed to the fabrication of boron articles by a powder metallurgical method wherein the articles are of a density close to the theoretical density of boron and are essentially crackfree. The method comprises the steps of admixing 1 to 10 weight percent carbon powder with amorphous boron powder, cold pressing the mixture and then hot pressing the cold pressed compact into the desired article. The addition of the carbon to the mixture provides a pressing aid for inhibiting the cracking of the hot pressed article and is of a concentration less than that which would cause the articles to possess significant concentrations of boron carbide.

REFERENCES:
patent: 1501419 (1924-07-01), Podszus
patent: 2728128 (1965-12-01), Sheer et al.
patent: 2920025 (1960-01-01), Anderson
patent: 2990261 (1961-06-01), Griener
patent: 3314859 (1967-04-01), Anthony
patent: 3338679 (1967-08-01), Muta et al.
patent: 3440312 (1969-04-01), Allieyro
patent: 3510398 (1970-05-01), Wood
patent: 3557266 (1971-01-01), Chiba et al.
patent: 3720740 (1973-03-01), Muta et al.

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