Rina Consulting—centro Sviluppo Materiali S.p.a.

Enea Ente Per Le Nuove Technologie, L'energia E L'ambiente

Selex Galileo S.p.a.

Stefano Martelli

Aldo Donato

Amedeo Masci

Carlo Alberto Nannetti

Sergio Casadio

Alberto Ortona

Gianni D'Alessandro

Sabina Botti

Antonio Alessandro Licciulli

Daniela Olevano

Elisabetta Borsella

Massimo Maffini

Aldo Riccobono

The present invention relates to refractories with a composition gradient for lining the interior surface of combustion chambers. The invention envisages the use of refractories characterized by the presence of a number of layers with a different chemical composition to form a gradient along the cross section of the material. The presence of the composition gradient serves to combine the corrosion resistance of the surface layer, facing towards the inside of the combustion chamber, with the shock resistance of the bulk material.

Refractories for applications in combustion chambers intended for producing energy and/or waste disposal

Ceramic matrix composites (CMC) of high density, preferably of the type SiC/SiC, are provided by a production process based on the infiltration of ceramic fiber cloths with a polymeric precursor solution containing, as fillers, inert powders having size much lower than the mean distance among the ceramic fibers which are used as basic material for the manufacturing of CMC, typically a nanometric granulometry. Such step is followed by the steps of hardening the cloths, pyrolysis of the polymer and repeated thickenings until the desired density is reached. A possible alternative process comprises a brief (&lt;24 hours) treatment of infiltration of SiC from the vapor phase (CVI) with precursors and typical operative parameters for the deposition of silicon carbide followed by the repeated thickenings.

Process for producing ceramic matrix composites by liquid infiltration

Growing community of inventors

Rome, Italy

Stefano Martelli