Method for making high ductility beryllium bodies

Details Method for making high ductility beryllium bodies Method for making high ductility beryllium bodies

1974-04-08

1976-12-28

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75200, 75150, 148126, B22F 300, C22F 116

Patent

active

039999866

ABSTRACT:
A method for making high ductility beryllium bodies by controlling beryllium oxide particle growth during hot pressing of beryllium powder to a maximum median size of 150 nm. More particularly, particle size is controlled by utilizing starting beryllium powder containing a maximum total concentration of aluminum, silicon and magnesium of 200 ppm and consolidating the powder at a maximum temperature of 1400.degree. F. Ductility is also enhanced by utilizing starting beryllium powder containing a maximum beryllium oxide volume fraction of 1.6 percent and annealing the consolidated powder at temperatures of from 2000.degree. to 2250.degree. F. The anneal can be a separate operation or a continuation of the hot pressing operation.

REFERENCES:
patent: 3129497 (1964-04-01), Johnston et al.
patent: 3418112 (1968-12-01), Zoran
patent: 3724050 (1973-04-01), Velten et al.
Martin et al., "Powder Metallurgy," vol. No. 7, 1961, pp. 120-138.

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