Patents Examined by Heinrich Sam
  • Diffusion bonding process for aluminum and aluminum alloys
    Patent number: 4978054
    Abstract: A method of forming diffusion bonds between aluminum and aluminum alloy saces by coating the surfaces with molten AgNO.sub.3 and then decomposing the AgNO.sub.3 to form a thin uniform layer of silver on the surfaces before forming the diffusion bond. The AgNO.sub.3 coating and decomposition in treatment permanently breaks up the Al.sub.2 O.sub.3 coatings on the aluminum or aluminum alloy surfaces, making diffusion bonding possible.
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: December 18, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: William A. Ferrando, Amarnath P. Divecha, Subhash D. Karmarkar