Patents by Inventor Terry N. Tiegs

Terry N. Tiegs has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for preparing configured silicon carbide whisker-reinforced alumina ceramic articles
    Patent number: 4652413
    Abstract: A ceramic article of alumina reinforced with silicon carbide whiskers suitable for the fabrication into articles of complex geometry are provided by pressureless sintering and hot isostatic pressing steps. In accordance with the method of the invention a mixture of 5 to 10 vol. % silicon carbide whiskers 0.5 to 5 wt. % of a sintering aid such as yttria and the balance alumina powders is ball-milled and pressureless sintered in the desired configuration in the desired configuration an inert atmosphere at a temperature of about 1800.degree. C. to provide a self-supporting configured composite of a density of at least about 94% theoretical density.
    Type: Grant
    Filed: October 16, 1985
    Date of Patent: March 24, 1987
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Terry N. Tiegs