Processing and properties of toughened ultrahigh temperature ceramics (Comunicazione a convegno)

Type

• Prodotto della ricerca (Classe)
• Comunicazione a convegno (Classe)

Label

• Processing and properties of toughened ultrahigh temperature ceramics (Comunicazione a convegno) (literal)

Anno

• 2010-01-01T00:00:00+01:00 (literal)

Alternative label

• Sciti D.; Silvestroni L.; Bellosi A.; Guicciardi S.; Nygren M. (2010)
  Processing and properties of toughened ultrahigh temperature ceramics
  in 34th International Conference and Exposition on Advanced Ceramics and Composites, Daytona Beach, Fl, US
  (literal)

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

• Sciti D.; Silvestroni L.; Bellosi A.; Guicciardi S.; Nygren M. (literal)

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

• In: ICACC - 34th International Conference and Exposition on Advanced Ceramics and Composites (Daytona Beach, Fl, US, 24-29/01 2010). (literal)

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

• Ultrahigh temperature materials are considered a class of promising materials for several applications, the most appealing ones being in the aerospace sector. Although much effort has been devoted to improve densification and mechanical properties, UHTCs still have poor fracture toughness. In this work, several methods for improving the fracture toughness are explored, including the addition of SiC whiskers and chopped fibers, the addition of partially stabilized t-ZrO2, or in-situ growth of elongated grains. Different processing methods are employed, as the thermal treatment can severely damage the reinforcement. Spark plasma sintering is employed for sintering whiskers-reinforced materials. Pressureless sintering is instead used for the in-situ development of elongated SiC grains. Flexural strength and toughness are compared to those of reference unreinforced materials. Toughening mechanisms are explored through analysis of crack propagation. Crack deflection, bridging, bowing and residual stresses are the most important toughening mechanisms considered. Experimental increases of toughness are compared to those predicted by theoretical models. Quite often, the increase in fracture toughness is accompanied by a decrease of strength, due to a change of the defects population. The addition of whiskers to ZrB2 -based materials allows both strengthening and toughening compared to the reference material (literal)

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

• CNR-ISTEC, Faenza, Stockholm Univ, Arrhenius Lab, Dept Inorgan Chem, Stockholm, Sweden (literal)

Titolo

• Processing and properties of toughened ultrahigh temperature ceramics (literal)

Prodotto di

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

Autore CNR

• STEFANO GUICCIARDI O GUIZZARDI (Persona)
• ALIDA BELLOSI (Persona)
• LAURA SILVESTRONI (Unità di personale interno)
• DILETTA SCITI (Unità di personale interno)

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• Parole chiave di "Processing and properties of toughened ultrahigh temperature ceramics" (Insieme di parole chiave)

Incoming links:

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)
• STEFANO GUICCIARDI O GUIZZARDI (Persona)
• LAURA SILVESTRONI (Unità di personale interno)

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• Parole chiave di "Processing and properties of toughened ultrahigh temperature ceramics" (Insieme di parole chiave)