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:
Aug. 06, 1985
Filed:
May. 08, 1983
Hirohisa Miura, Aichi, JP;
Hiroshi Sato, Aichi, JP;
Toshio Natsume, Aichi, JP;
Hidenori Katagiri, Aichi, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
Fine powder of an alloy of two or more metals is made by vaporizing each of these metals in its own vaporization chamber, mixing each of the metallic vapors with an inert carrier gas, and then adiabatically expanding each of the mixture gases through its own nozzle, which preferably is a convergent-divergent nozzle. Jet flows from the nozzles are collided together, after having been very rapidly cooled by this adiabatic expansion, and thereby the metal vapors in the jet flows are quickly condensed into very fine alloy particles. Optionally the combined flows from the jets are directed against an alloy powder collecting means, which may be a collection plate, but preferably is a bath of oil which entrains the alloy particles and keeps them from agglomerating together by partially neutralizing their surface activity. Thus fine alloy powder with particle diameters of the order of a few hundreds of angstroms can be economically produced.