Patents by Inventor Chang Hyun Woo

Chang Hyun Woo 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).

  • Publication number: 20100089499
    Abstract: A metal coated with ceramic and a method manufacturing the same. The metal contains chromium. A buffer layer is disposed on the metal, and a silicon carbide (SiC) coating layer is disposed on the buffer layer. The buffer layer has a thermal expansion coefficient between those of the metal and the SiC coating layer. The method includes annealing a metal containing chromium to form a chromium oxide layer on the metal, dissolving polycarbosilane (PCS) in a solvent to form a PCS coating solution, coating the chromium oxide layer with the PCS solution, and annealing the to form an SiC coating.
    Type: Application
    Filed: December 14, 2009
    Publication date: April 15, 2010
    Applicant: TOKAI CARBON KOREA CO., LTD.
    Inventors: Joung Il Kim, Chang Hyun Woo, Jong Sung Yoon, Bae Seok Kim
  • Publication number: 20090191405
    Abstract: A metal coated with ceramic and a method manufacturing the same. The metal contains chromium. A buffer layer is disposed on the metal, and a silicon carbide (SiC) coating layer is disposed on the buffer layer. The buffer layer has a thermal expansion coefficient between those of the metal and the SiC coating layer. The method includes annealing a metal containing chromium to form a chromium oxide layer on the metal, dissolving polycarbosilane (PCS) in a solvent to form a PCS coating solution, coating the chromium oxide layer with the PCS solution, and annealing the to form an SiC coating.
    Type: Application
    Filed: March 28, 2008
    Publication date: July 30, 2009
    Applicant: TOKAI CARBON KOREA CO., LTD.
    Inventors: Joung II Kim, Chang Hyun Woo, Jong Sung Yoon, Bae Seok Kim
  • Publication number: 20080118758
    Abstract: A metal coated with a ceramic material and a method of manufacturing the same are provided. The method includes a) preparing a coating solution by dissolving a SiC precursor in a solvent; b) coating a metal material with the coating solution using a non-thermal coating technique; c) forming a SiC precursor coating layer on the metal material by drying the metal material coated with the coating solution in an oxygen-free atmosphere; d) partially removing a polymer by preprocessing the SiC precursor coating layer; and e) converting the SiC precursor coating layer into a SiC coating layer using a thermal treatment process. In this method, the SiC precursor is coated on the metal material and converted into the SiC coating layer, so that a pure SiC coating layer can be formed without causing cracking or delaminating. Thus, the metal material can have higher resistance to oxidation, chemicals, and heat.
    Type: Application
    Filed: October 30, 2007
    Publication date: May 22, 2008
    Applicant: TOKAI CARBON KOREA CO., LTD.
    Inventors: Joung Il Kim, Chang Hyun Woo