Patents by Inventor Eul Son Kang

Eul Son Kang 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).

  • Titanium diboride sintered body with silicon nitride as a sintering aid
    Patent number: 6534428
    Abstract: The present invention relates to a titanium diboride sintered body and a method for manufacturing thereof wherein silicon nitride is added to a titanium diboride as a sintering aid. The sintered body according to the present invention has a fine structure and excellent physical characteristics such as a strength, hardness, etc. Therefore, the sintered body according to the present invention may be applicable to certain materials which requires high strength and hardness.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: March 18, 2003
    Assignee: Agency For Defense Development
    Inventors: Yong Kee Baek, Hyoun-Ee Kim, June Ho Park, Eul Son Kang
  • Titanium diboride sintered body with silicon nitride as a sintering aid and a method for manufacture thereof
    Publication number: 20020128143
    Abstract: The present invention relates to a titanium diboride sintered body and a method for manufacturing thereof wherein silicon nitride is added to a titanium diboride as a sintering aid. The sintered body according to the present invention has a fine structure and excellent physical characteristics such as a strength, hardness, etc. Therefore, the sintered body according to the present invention may be applicable to certain materials which requires high strength and hardness.
    Type: Application
    Filed: May 10, 2002
    Publication date: September 12, 2002
    Applicant: Agency for Defense Development
    Inventors: Yong Kee Baek, Hyoun-Ee Kim, June Ho Park, Eul Son Kang
  • Titanium diboride sintered body with silicon nitride as a sintering aid and a method for manufacture thereof
    Patent number: 6420294
    Abstract: The present invention relates to a titanium diboride sintered body and a method for manufacturing thereof wherein silicon nitride is added to a titanium diboride as a sintering aid. The sintered body according to the present invention has a fine structure and excellent physical characteristics such as a strength, hardness, etc. Therefore, the sintered body according to the present invention may be applicable to certain materials which requires high strength and hardness.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: July 16, 2002
    Assignee: Agency for Defense Development
    Inventors: Yong Kee Baek, Hyoun-Ee Kim, June Ho Park, Eul Son Kang
  • Silicon nitride sintered body with region varying microstructure and method for manufacture thereof
    Patent number: 6136738
    Abstract: A silicon nitride sintered body is obtained by mixing 2.about.16 wt % of Yb.sub.2 O.sub.3 as a sintering additive with Si.sub.3 N.sub.4 powders including unavoidable impuirities, pressing the mixed powder into a desired form, and gas-pressure sintering the thusly pressed form, whereby an inner region of the sintered body has a fine microstructure, and an outer region thereof has a mixed microstructure in which elongated grains and fine grains co-exist and a method for manufacturing a silicon nitride sintered body, includes the steps of: adding and mixing 2.about.16 wt % of Yb.sub.2 O.sub.3 powder as a sintering additive into a silicon nitride (Si.sub.3 N.sub.4) powder; ball-milling the mixed powder to obtain a slurry; drying and classifying the slurry; press-forming the resultant powder in a die uniaxially and isostatically; and gas-pressure sintering the resultant compact body at a temperature in the range of 1800.about.2000.degree. C.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: October 24, 2000
    Assignee: Agency for Defense Development
    Inventors: Yong Kee Baek, Hyoun-Ee Kim, Won Ho Lee, Ki Min Lee, Seung Su Baek, Eul Son Kang
  • Method for strengthening and aging-prevention of TZP by formation of silica/zircon layer on the surface thereof
    Patent number: 6033727
    Abstract: A method for strengthening and aging-prevention of a TZP ceramics includes the steps of: introducing TZP ceramic and Si-based ceramic powders into a furnace in which a water vapor pressure is controlled; and exposing the TZP ceramic next to Si-based ceramic in a flowing H.sub.2 atmosphere containing H.sub.2 O of no more than 0.1%, to form a silica/zircon layer on the surface of the TZP ceramic.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: March 7, 2000
    Assignee: Agency for Defense Development
    Inventors: Yong Kee Baek, Hyoun-Ee Kim, Young Hak Ko, Eul-Son Kang