Age hardened beryllium alloy and cermets
AssigneeThe Charles Stark Draper Laboratory, Inc.
InventorsByong-Ho Ahn, Dilip K. Das, Kaplesh Kumar
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Abstract
Process for the formation of precipitation hardened beryllium-nickel, beryllium-iron, and beryllium-cobalt alloys and cermets for structural and bearing use respectively in precision instruments and such alloys and cermets. A beryllium-nickel, -iron, or -cobalt high solute solution at elevated temperature is rapidly cooled to provide a readily machined solid solution. After machining, the alloy is reheated to an intermediate temperature under controlled conditions where precipitation hardening occurs through limited precipitate cluster formation. A cermet is formed in the process with the addition of a ceramic material to the beryllium alloy in the initial steps.
Claims2
A process for the formation of a cermet for use as a bearing in precision instruments comprising the steps of:
- consolidating powders consisting of beryllium and a non-beryllium based ceramic selected from the group consisting of titanium diboride, titanium carbide, titanium nitride, tantalum carbide, zirconium carbide, vanadium carbide, aluminum oxide, chromium oxide, tantalum oxide, silicon nitride, boron carbide and boron nitride in a ratio of 30 to 60 volume percent ceramic by cold processing;
- and
- densifying the consolidated powders by hot isostatic pressing.
Dependencies are inferred from the claim text.