Diffusion Of Aluminum Patents (Class 148/DIG33)
  • Patent number: 5384161
    Abstract: An aluminum object is manufactured by a process including chromate conversion coating of the aluminum object; sequentially applying a primer coat to the outer surface and thereafter applying a dielectric substrate basecoat; vacuum metallizing a corrosion prone metal, namely indium, on the dielectric substrate basecoat to form "islands" of the indium that are top coated with a clear resinous layer to encapsulate and insulate the islands, one from another. The indium islands are less than one thousand angstroms thick and have an average diameter of less than three thousand angstroms. The island structure is etched following the growth of the metal as it is deposited between the nucleation stage and the stage of channelization of formation of an electrically conductive film. The etchant is selected to clear channels between island structures to improve adhesion of a dielectric resinous top coat to the dielectric substrate by order of magnitude to adhesion to the islands.
    Type: Grant
    Filed: January 3, 1994
    Date of Patent: January 24, 1995
    Assignee: Davidson Textron Inc.
    Inventors: Richard C. Eisfeller, John Clark
  • Patent number: 4936927
    Abstract: Aluminum diffusion coatings are applied to structural components of titanium alloys by two separate heat treatment steps applied to the component embedded in an aluminum powder. The first heat treatment step is performed at relatively very low temperatures for avoiding an oxygen embrittlement of the structural component by any remainder oxygen. The subsequent diffusion heat treatment is performed at higher temperatures. If desired, a getter material having a high oxygen affinity, is added to the powder mixture in which the structural components are embedded for the first treatment. The getter material binds any remainder oxygen.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: June 26, 1990
    Assignee: MTU Motoren- und Turbinen-Union Muenchen GmbH
    Inventors: Richard Grunke, Lothar Piechl
  • Patent number: 4935193
    Abstract: The quality or durability of an oxidation protective coating produced by alitizing or aluminizing on the surface of a structural component made of titanium or titanium alloy, is improved by adding niobium to the surface of the structural component. The addition may be accomplished prior to the aluminizing or during the aluminizing. Prior application may involve, for example, vapor deposition of the niobium. Simultaneous application involves including a niobium donator powder in the aluminizing powder mixture.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: June 19, 1990
    Assignee: MTU Motoren-und Turbinen-Union Muenchen GmbH
    Inventors: Richard Grunke, Lothar Peichl, Heinrich Walter