Patents by Inventor Ozer Unal

Ozer Unal 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).

  • Low temperature joining of ceramic composites
    Patent number: 6214472
    Abstract: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or cermaic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: April 10, 2001
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Iver E. Anderson, Sina Ijadi-Maghsoodi, Mohammad Nosrati, Ozer Unal
  • Low temperature joining of ceramic composites
    Patent number: 5922628
    Abstract: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or ceramic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: July 13, 1999
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Iver E. Anderson, Sina Ijadi-Maghsoodi, Mohammad Nosrati, Ozer Unal
  • Low temperature joining of ceramic composites
    Patent number: 5858144
    Abstract: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or cermaic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: January 12, 1999
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Thomas J. Barton, Iver E. Anderson, Sina Ijadi-Maghsoodi, Mohammad Nosrati, Ozer Unal