Patents by Inventor Rémy Mevrel

Rémy Mevrel 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).

  • Patent number: 7374821
    Abstract: The invention relates to a ceramic thermal barrier composition of low conductivity and high high-temperature strength. In characteristic manner, the composition comprises a zirconia base, at least one trivalent oxide enabling the zirconia to be stabilized and enabling the thermal conductivity of the zirconia to be reduced in optimum manner, and at least one pentavalent oxide enabling the content of oxygen vacancies to be reduced so as to make it substantially equal to that of a partially stabilized zirconia. Preferably, said trivalent oxide is present with a molar content constituted by a first portion enabling the zirconia to be stabilized partially and a second portion which introduces point defects into the lattice said pentavalent oxide is present with a molar concentration equal to said molar concentration of said second portion of the trivalent oxide. The invention is applicable to making a superalloy machine part having a ceramic coating with said composition, and possibly also a bonding underlayer.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: May 20, 2008
    Assignees: Snecma, Snecma Services
    Inventors: Bérangère Leclercq, Rémy Mevrel, Alban Azzopardi, André Malie, Bertrand Saint-Ramond
  • Patent number: 6333118
    Abstract: A low thermal conductivity heat barrier composition, particularly for a superalloy article, is disclosed comprising a zirconia base and a dysprosium oxide having the dual function of stabilizing the zirconia and reducing the thermal conductivity thereof. Optionally, the composition also comprises a metal oxide containing a quadrivalent metallic ion selected from the group consisting of hafnium dioxide, cerium dioxide, uranium dioxide, and mixtures thereof.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: December 25, 2001
    Assignee: SNECMA Moteurs
    Inventors: Serge Alperine, Véronique Arnault, Odile Lavigne, Rémy Mevrel