Process for manufacturing a ceramic composite based on silicon nitride and β-eucryptite

US8486851B2 · kind B2 · utility

Assignee

• THALES · FR

Inventors

• Laurent Blanchard · Mouans-Sartoux, FR
• Gilbert Fantozzi · Meyzieu, FR
• Aurélien Pelletant · Villeurbanne, FR
• Helen Reveron · Villeurbanne, FR
• Jerome Chevalier · Rillieux-la-Pape, FR
• Yann Vitupier · Mougins, FR

Key dates

• Filing date: Apr 28, 2011
• Grant date: Jul 16, 2013
• Expiry date: Jul 17, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/662
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for manufacturing a sintered ceramic composite, based on silicon nitride and β-eucryptite, includes a step of producing a first powder blend, consisting of a powder of silicon nitride in crystalline form and a powder of a first lithium aluminosilicate in crystalline form, the composition of which is the following: (Li2O)x(Al2O3)y(SiO2)z, the lithium aluminosilicate composition being such that the set of molar fractions (x,y,z) is different from the set (1,1,2).