Title:
【発明の名称】窒化物、炭化物、および酸化物の保護コーティング形成のためのプロセッシング
Document Type and Number:
Japanese Patent JPH11505293
Kind Code:
A
Abstract:
A substrate material to be coated with either a nitride, carbide, or oxide contains a small percent of a specific reactive element, like titanium, which forms very stable nitrides, carbides, or oxides. The material also contains larger percentages of elements, such as chromium, which form less-stable nitrides, carbides, or oxides. When the substrate material is immersed in a process medium which contains reactants, such as nitrogen, carbon, or oxygen, at a chosen elevated temperature and concentration, the less-stable nitrides, carbides, or oxides are reduced and cannot form a coating on the material surface. Thus, only a very stable nitride, carbide, or oxide can form a strong, adherent coating. As such, a stable compound forms on the surface, the surface concentration of the specific reactive element atoms (example: titanium) is depleted in relation to the atom concentration in the bulk material, and a concentration gradient results which causes more of the specific reactive element atoms to diffuse to the surface and react with the reactant in the process medium until a coating of the desired thickness is formed.
Inventors:
Alger, Donald El.
Application Number:
JP53245296A
Publication Date:
May 18, 1999
Filing Date:
April 27, 1995
Export Citation:
Assignee:
Alger, Donald El.
International Classes:
C23C8/06; C23C8/10; C23C8/16; C23C8/20; C23C8/24; C23C8/42; C23C10/22; C23C12/00; C23C14/58; C23C16/52; C23C8/02; C23C26/00; C23C28/04; (IPC1-7): C23C8/06; C23C8/02; C23C8/16; C23C8/20; C23C8/24; C23C8/42; C23C12/00; C23C14/58; C23C16/52; C23C28/04
Attorney, Agent or Firm:
Shusaku Yamamoto