Refractory ceramic material having a high solidus temperature, its manufacturing process and structural part incorporating said material

US8236414B2 · kind B2 · utility

Assignees

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR
• Ecole Nationale Superieure de Ceramique Industrielle · FR

Inventors

• Pascal Piluso · Pertuis, FR
• Mélusine Ferrier · Paris, FR
• Jean-Pierre Bonnet · Carry-le-Rouet, FR

Key dates

• Filing date: Dec 21, 2007
• Grant date: Aug 7, 2012
• Expiry date: Feb 14, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249981
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A refractory ceramic material possessing a solidus temperature between 2500° C. and 2800° C., having a compactness greater than 85%, and a microstructure such that the material is composite of: (a) hafnium dioxide HfO2 grains having a monoclinic structure (1); (b) hafnium dioxide HfO2 grains having a cubic structure (2) which is stabilized by yttrium oxide Y2O3, the yttrium oxide Y2O3 representing 0.5 mol % to 8 mol % relative to the total number of moles of hafnium dioxide HfO2; (c) closed pores (3); (d) non-interconnected open pores. The process of manufacturing the material and a structural part incorporating the material are also set forth.