An attempt to improve the fracture toughness of ZrB2-based ultra high temperature ceramics (Abstract/Poster in convegno)

Type

• Abstract/Poster in convegno (Classe)
• Prodotto della ricerca (Classe)

Label

• An attempt to improve the fracture toughness of ZrB2-based ultra high temperature ceramics (Abstract/Poster in convegno) (literal)

Anno

• 2009-01-01T00:00:00+01:00 (literal)

Alternative label

• Sciti D.; Silvestroni L.; Melandri C.; Bellosi A.; Nygren M. (2009)
  An attempt to improve the fracture toughness of ZrB2-based ultra high temperature ceramics
  in 33rd International Conference and Exposition on Advanced Ceramics and Composites, Daytona Beach, Florida
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Sciti D.; Silvestroni L.; Melandri C.; Bellosi A.; Nygren M. (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

• In: ICACC 2009 - 33rd International Conference and Exposition on Advanced Ceramics and Composites (Daytona Beach, Florida, 18-23 gennaio 2009). (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto

• Zirconium diboride-based materials are currently considered a class of promising materials for several applications, the most appealing ones being in the aerospace sector. In the last decade, much effort has been devoted to improve densification and mechanical properties of these compounds. Although high values of flexural strength (800 MPa) have been reached, the fracture toughness still remains matter of concern. Recently, the possibility to reinforce the boride matrix through addition of whiskers has been considered. In this work, composite materials containing SiC whiskers were produced by pressureless sintering at 1950°C, hot pressing at 1870°C and spark plasma sintering at 1600-1700°C. SEM analysis of the microstructure revealed that the sintering temperature strongly affects the final microstructure, as SiC whiskers tend to react with the boride matrix. During sintering at 1950°C, the whiskers transform into large SiC platelets or particles, loosing their reinforcing action as deflecting agents. An increase of toughness was measured for the composite densified by spark plasma sintering at 1600°C, as at this temperature the whiskers retained their original morphology (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• CNR-ISTEC, Faenza, Arrhenius Lab, University of Stockolm, Sweden (literal)

Titolo

• An attempt to improve the fracture toughness of ZrB2-based ultra high temperature ceramics (literal)

Prodotto di

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Produzione e caratterizzazione di materiali ceramici compositi funzionali elettroconduttivi e ad alta lavorabilità. (SP.P01.033.002) (Modulo)

Autore CNR

• CESARE MELANDRI (Unità di personale interno)
• LAURA SILVESTRONI (Persona)
• DILETTA SCITI (Unità di personale interno)
• ALIDA BELLOSI (Persona)

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Prodotto

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Produzione e caratterizzazione di materiali ceramici compositi funzionali elettroconduttivi e ad alta lavorabilità. (SP.P01.033.002) (Modulo)

Autore CNR di

• DILETTA SCITI (Unità di personale interno)
• ALIDA BELLOSI (Persona)
• CESARE MELANDRI (Unità di personale interno)
• LAURA SILVESTRONI (Persona)

Insieme di parole chiave di

• Parole chiave di "An attempt to improve the fracture toughness of ZrB2-based ultra high temperature ceramics" (Insieme di parole chiave)