Scheda di dettaglio
 

Materiali compositi a base di fibre C/SiC con matrice ultrarefrattaria ad alta tenacità e resistenza all’ablazione

An object of this invention is the fabrication of a composite material composed of a ultrarefractory ceramic matrix (based on ZrB2, or HfB2 and containing low amounts of SiC- WC particles, and sintering agents) and high modulus C fibres (continuous or chopped) with high fracture toughness and resistance to ablation. These composites can be prepared using various infiltration or mixing techniques to introduce fibres into a refractory matrix or for infiltrating a fibre preform with a refractory ceramic slurry. The composite is subsequently sintered, with or without addition of sintering aids, with or without the application of mechanical or gas pressure. The composites exhibit a damage tolerant behaviour, an outstanding resistance to erosion/ablation at high temperature and self-healing capability.

 
 


Inventori

  • Sciti Diletta (ISTEC)
  • MEDRI VALENTINA
  • ZOLI LUCA
 
 


TitolaritÀ

  • Consiglio Nazionale delle Ricerche
 
 


Classificazioni

  • calce, magnesia, scorie, cemento e loro composizione: malta, calcestruzzo e simili materiali da costruzione; pietre artificiali, materiali ceramici, refrattari, trattamento delle pietre naturali
  • impianti a reazione
 
 


Settore Tecnologico

  • materiali ceramici
  • tecnologie aeronautiche e avionica
 
 


Keyword

  • Ceramic matric composites, Ultra high temperature ceramics, resistance to ablation, ZrB2, UHTC, UHTCMCs
 
 


Vantaggi

In summary, advantages are: A reinforced ceramic, being ultrarefractory, damage tolerant and resistant to ablation/erosion, endowed with self healing capability. Fast processing compared to conventional methods using CVI techniques. The sintered matrix offers a higher degree of protection against oxidation of the carbon fibres.

 
 


Applicazioni
 
fonte dati: "Gestione Trovati" | brevetti.cnr.it | www.cnr.it | Consiglio Nazionale delle Ricerche | P.le Aldo Moro, 7 | 00185 Roma