The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 16, 1976
Filed:
Apr. 07, 1975
Vijay K Chandhok, Pittsburgh, PA (US);
Crucible Inc., Pittsburgh, PA (US);
Abstract
A method and assembly for producing compacted powder metallurgy articles wherein powdered metal of a composition corresponding to that desired in the article is introduced to a porous mold corresponding generally to the desired configuration of the article, the mold is placed in a container sealed against the atmosphere and having a secondary pressure media in solid, particle form therein and surrounding the mold. This assembly is heated to elevated temperature for compacting and compacted by the application of pressure to the assembly. The improvement of the invention comprises mixing with the secondary pressure media a reactive metal selected from the group consisting of titanium, zirconium, hafnium and mixtures thereof, which acts as a getter for impurities, such as oxygen and nitrogen, present in the secondary pressure media. This prevents oxide and nitride formation in the final compacted article.