Patents by Inventor Gisèle Coing-Boyat

Gisèle Coing-Boyat 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).

  • 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
  • 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
  • Joining by brazing of ceramic materials containing silicon carbide
    Patent number: 5836505
    Abstract: The present invention relates to joining by brazing ceramic elements comprising SiC. The purpose of the invention is to provide a braze alloy which gives a brazed joint resistant to fluorine effluents and having controlled reactivity with SiC. This purpose is achieved using a braze alloy comprising Si and rhodium.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: November 17, 1998
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Gilles Chaumat, Gisele Coing-Boyat