Patents by Inventor Deug J. Kim

Deug J. Kim 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 of surface strengthening alumina-zirconia composites using MoO.sub.2
    Patent number: 5336646
    Abstract: MoO.sub.2 is used as an accelerant for transformation of zirconia (ZrO.sub.2) from a tetragonal to a monoclinic crystal phase. A ZrO.sub.2 -MoO.sub.2 alloy having an increased content of monoclinic ZrO.sub.2 is prepared by mixing MoO.sub.2 with ZrO.sub.2 followed by heat treatment. In another aspect of the invention, the surface of an alumina-zirconia composite is strengthened by heating the composite in the presence of MoO.sub.2 -ZrO.sub.2 mixed powder.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: August 9, 1994
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Suk-Joong L. Kang, Yu S. Shin, Nong M. Whang, Duk Y. Yoon, Deug J. Kim