Patents Assigned to The United States of America Government as represented by the Administrator of the National Aeronautics and Space Administration
  • Oxidation-resistant Ti-Al-Fe alloy diffusion barrier coatings
    Patent number: 5776617
    Abstract: A diffusion barrier to help protect titanium aluminide alloys, including the coated alloys of the TiAl.gamma.+Ti.sub.3 Al (.alpha..sub.2) class, from oxidative attack and interstitial embrittlement at temperatures up to at least 1000.degree. C. is disclosed. The coating may comprise FeCrAlX alloys. The diffusion barrier comprises titanium, aluminum, and iron in the following approximate atomic percent:Ti-(50-55)Al-(9-20)Fe.This alloy is also suitable as an oxidative or structural coating for such substrates.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: July 7, 1998
    Assignee: The United States of America Government as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Michael P. Brady, James L. Smialek, William J. Brindley