Ceramiques Et Composites

Societe Nationale Industrielle Aerospatiale

Ceraver

Claudette Drouet

Louis Minjolle

Bernard Lengronne

Alain Hordonneau

Bernard Capdepuy

Yves Laurent

Patrick Verdier

Paul Goursat

Christophe Seraudie

Erik Mennessier

Laurence Poquillon

Glass compositions containing oxygen and nitrogen prepared by melting admixture of magnesia and/or a magnesium silicate, silica and an aluminum nitride produced by reacting ammonia with aluminum oxide, have the formula:

Glass compositions containing oxygen and nitrogen and production of

Composite shaped articles, well adapted for aerospace applications, include a glass-ceramic and an effective amount of a reinforcing agent therefor, preferably a fibrous and ceramic reinforcing agent, such glass-ceramic matrix being based on silica, alumina, an alkaline earth metal oxide and a rare earth oxide, in the following proportions by weight relative to the total weight of the matrix:

Composite shaped articles comprising reinforced glass-ceramic matrices

An improved method of manufacturing a composite structure of ceramic material reinforced by refractory fibers is disclosed, whereby the fibers are first embedded in a slip of the ceramic material containing a synthetic resin with good ceramic and fiber wetting properties and a solvent of said resin, the liquid phase is thereafter eliminated from the slip by drying, the synthetic resin is driven from the formed structure by heating, and the fiber-reinforced ceramic material is sintered. The improvement consists in avoiding the use of costly aluminum-nitride powder by initially incorporating an aluminum powder in the slip along with the resin solvent and nitriding the powder in the structure, after drying and firing, but before sintering.

Method of manufacturing a reinforced composite structure of ceramic

The present invention relates to a ceramicized refractory composite and to a process for manufacturing same, wherein a multidirectional woven network is impregnated with a suspension of a ceramic powder and a fluid composition of a substance producing, under the action of heat treatment, a body of the same nature as the ceramic powder of said suspension.

Refractory composite reinforced with refractory fibers and process for

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Juillan, France

Claudette Drouet