Method for making high ductility beryllium bodies
US3999986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1974 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Apr 8, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/0408
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.