Patents by Inventor Michael A. Kmetz

Michael A. Kmetz 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).

  • Boron nitride coated fibers and composite articles containing same
    Patent number: 7867554
    Abstract: Boron nitride coated fibers, and composite articles comprising such fibers, are described herein. These fibers can be desized and coated in one continuous process, without requiring purging in between processing steps. The fibers may be heated up in an ammonia atmosphere, and then be contacted with a reaction mixture, which comprises a boron source and a nitrogen source. Once coated, the fibers may be utilized in a ceramic matrix composite.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: January 11, 2011
    Assignee: United Technologies Corporation
    Inventor: Michael A. Kmetz
  • Preceramic silazane polymer for ceramic materials
    Patent number: 7842774
    Abstract: A method of forming a preceramic polymer includes treating a silane precursor having a vinyl moiety of ammonia to produce the preceramic polymer. For example, the silane precursor is trichlorovinylsilane. The preceramic polymer may then be cross-linked at a relatively low temperature by using a cross-linking agent.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: November 30, 2010
    Assignee: United Technologies Corporation
    Inventor: Michael A. Kmetz
  • COATINGS AND COATING PROCESSES FOR MOLYBDENUM SUBSTRATES
    Publication number: 20090197075
    Abstract: In a method for coating a molybdenum-based substrate, a molybdenum disilicide layer is formed on the substrate. Aluminum is reacted with hydrochloric gas to produce aluminum chloride. The aluminum chloride is reacted with hydrogen and carbon dioxide to produce alumina. A layer of the alumina is deposited atop the molybdenum disilicide layer.
    Type: Application
    Filed: February 1, 2008
    Publication date: August 6, 2009
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventors: Kirk C. Newton, Michael A. Kmetz
  • MULTILAYERED BORON NITRIDE/SILICON NITRIDE FIBER COATINGS
    Publication number: 20090178618
    Abstract: A composite is described which has particular utility in the formation of components for gas turbine engines. The composite broadly comprises a substrate having a surface and at least one layer of a BN/Si3N4 coating on the substrate surface. The coating preferably is formed by alternative layers of a BN material and a Si3N4 material. The substrate may be a cloth material with fibers, such as SiC fibers, woven therein.
    Type: Application
    Filed: March 26, 2009
    Publication date: July 16, 2009
    Applicant: United Technologies Corporation
    Inventor: Michael Kmetz
  • MULTILAYERED BORON NITRIDE/SILICON NITRIDE FIBER COATINGS
    Publication number: 20090088038
    Abstract: A composite is described which has particular utility in the formation of components for gas turbine engines. The composite broadly comprises a substrate having a surface and at least one layer of a BN/Si3N4 coating on the substrate surface. The coating preferably is formed by alternative layers of a BN material and a Si3N4 material. The substrate may be a cloth material with fibers, such as SiC fibers, woven therein.
    Type: Application
    Filed: December 5, 2008
    Publication date: April 2, 2009
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventor: Michael Kmetz
  • Multilayered boron nitride/silicon nitride fiber coatings
    Patent number: 7510742
    Abstract: A composite is described which has particular utility in the formation of components for gas turbine engines. The composite broadly comprises a substrate having a surface and at least one layer of a BN/Si3N4 coating on the substrate surface. The coating preferably is formed by alternative layers of a BN material and a Si3N4 material. The substrate may be a cloth material with fibers, such as SiC fibers, woven therein.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: March 31, 2009
    Assignee: United Technologies Corporation
    Inventor: Michael Kmetz
  • PRECERAMIC SILAZANE POLYMER FOR CERAMIC MATERIALS
    Publication number: 20090030142
    Abstract: A method of forming a preceramic polymer includes treating a silane precursor having a vinyl moiety of ammonia to produce the preceramic polymer. For example, the silane precursor is trichlorovinylsilane. The preceramic polymer may then be cross-linked at a relatively low temperature by using a cross-linking agent.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 29, 2009
    Inventor: Michael A. Kmetz
  • Ceramic matrix laminates
    Publication number: 20070172639
    Abstract: The invention provides systems and methods for forming low density ceramic felt material cores which are sandwiched between ceramic matrix composites to form a ceramic matrix laminate possessing a high strength-to-density ratio while maintaining a stiffness required for mechanical applications. The core and face plates are coupled together using a chemical vapor process.
    Type: Application
    Filed: January 17, 2007
    Publication date: July 26, 2007
    Inventor: Michael A. Kmetz
  • Multilayered boron nitride/silicon nitride fiber coatings
    Publication number: 20070117484
    Abstract: A composite is described which has particular utility in the formation of components for gas turbine engines. The composite broadly comprises a substrate having a surface and at least one layer of a BN/Si3N4 coating on the substrate surface. The coating preferably is formed by alternative layers of a BN material and a Si3N4 material. The substrate may be a cloth material with fibers, such as SiC fibers, woven therein.
    Type: Application
    Filed: November 18, 2005
    Publication date: May 24, 2007
    Inventor: Michael Kmetz
  • Boron nitride coated fibers and composite articles containing same
    Publication number: 20060147692
    Abstract: Boron nitride coated fibers, and composite articles comprising such fibers, are described herein. These fibers can be desized and coated in one continuous process, without requiring purging in between processing steps. The fibers may be heated up in an ammonia atmosphere, and then be contacted with a reaction mixture, which comprises a boron source and a nitrogen source. Once coated, the fibers may be utilized in a ceramic matrix composite.
    Type: Application
    Filed: January 6, 2005
    Publication date: July 6, 2006
    Inventor: Michael Kmetz
  • Boron carbide coated refractory fibers
    Patent number: 5429870
    Abstract: A fiber is coated with boron carbide by contacting the fiber with a reaction mixture of a boron source and a carbon source at a temperature of at least about 1050.degree. C. such that the boron source and carbon source react with each other to produce a boron carbide coating on the fiber. The fiber comprises aluminum oxide, SiC, or Si.sub.3 N.sub.4 and the boron carbide coating comprises up to about 40 atomic percent boron.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: July 4, 1995
    Assignee: United Technologies Corporation
    Inventors: Michael A. Kmetz, John M. Laliberte, Steven L. Suib, Francis S. Galasso