Patents by Inventor Gerard Bourgeois

Gerard Bourgeois 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).

  • Composition and process for the reactive brazing of ceramic materials containing alumina
    Patent number: 6247565
    Abstract: The invention relates to a composition and a process for the reactive brazing of ceramic materials containing alumina. This composition comprises at least one precious metal chosen from among Pd, Pt and Au, as well as magnesium, preferably at the most 5 wt. % magnesium. Brazing takes place at a temperature of 1300 to 1600° C., in the absence of hydrogen.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: June 19, 2001
    Assignee: Commissariat a l'Energie Atomique
    Inventors: François Saint-Antonin, Gérard Bourgeois
  • Method using a thick joint for joining parts in SiC-based materials by refractory brazing and refractory thick joint thus obtained
    Patent number: 6221499
    Abstract: The present invention relates to a method of joining at least two parts of silicon carbide based material by refractory brazing in which these parts are brought into contact with an intermetallic braze alloy and said parts and braze alloy are heated to a braze temperature equivalent to the melting temperature of the braze alloy in order to form a refractory joint characterized in that the intermetallic braze alloy comprises 1 to 18% by weight of cobalt and from 82 to 99% by weight of silicon, and in that the joint obtained is a thick joint, that is to say with a thickness of generally from 0.1 to 0.5 mm. The invention also relates to a thick, refractory joint obtained by this method. Bonds of silicon carbide parts with thick joints prepared using the method of the invention allow the production with great precision of structures, apparatus and components with complex shapes having high temperatures of use reaching as high as 1000° C. and even higher.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: April 24, 2001
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Adrien Gasse, Gisèle Coing-Boyat, Gérard Bourgeois
  • Composition and process for the reactive brazing of ceramic materials containing alumina
    Patent number: 6050478
    Abstract: The invention relates to a composition and a process for the reactive brazing of ceramic materials containing alumina.This composition comprises at least one precious metal chosen from among Pd, Pt and Au, as well as magnesium, preferably at the most 5 wt. % magnesium. Brazing takes place at a temperature of 1300 to 1600.degree. C., in the absence of hydrogen.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: April 18, 2000
    Assignee: Commissariat A l'Energie Atomique
    Inventors: Fran.cedilla.ois Saint-Antonin, Gerard Bourgeois
  • Method using a thick joint for joining parts in SiC-based materials by refractory brazing and refractory thick joint thus obtained
    Patent number: 5975407
    Abstract: A method of joining at least two parts in silicon carbide based material by refractory brazing in which these parts are brought into contact with an intermetallic braze alloy and said parts and braze alloy are heated to a braze temperature equivalent to the melting temperature of the braze alloy in order to form a refractory joint characterized in that the intermetallic braze alloy comprises 1 to 18% by weight of cobalt and from 82 to 99% by weight of silicon, and in that the joint obtained is a thick joint, that is to say with a thickness of generally from 0.1 to 0.5 mm, and a thick refractory joint obtained by this method, wherein bonds of silicon carbide parts with thick joints prepared using the method of the invention allow the production with great precision of structures, apparatus and components with complex shapes having high temperatures of use reaching as high as 1000.degree. C. and even higher.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: November 2, 1999
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Adrien Gasse, Gisele Coing-Boyat, Gerard Bourgeois