Efficacy of HfN as sintering aid in the manufacture of ultrahigh-temperature metal diborides-matrix ceramics (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Efficacy of HfN as sintering aid in the manufacture of ultrahigh-temperature metal diborides-matrix ceramics (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

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

• 10.1557/JMR.2004.0460 (literal)

Alternative label

• Frederic Monteverde; Alida Bellosi (2004)
  Efficacy of HfN as sintering aid in the manufacture of ultrahigh-temperature metal diborides-matrix ceramics
  in Journal of materials research
  (literal)

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

• Frederic Monteverde; Alida Bellosi (literal)

Pagina inizio

• 3576 (literal)

Pagina fine

• 3585 (literal)

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

• http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8108029 (literal)

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

• 19 (literal)

Rivista

• Journal of materials research (Rivista)

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

• 10 (literal)

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

• 12 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• National Research Council - Institute of Science and Technology for Ceramics, 48018 Faenza, Italy (literal)

Titolo

• Efficacy of HfN as sintering aid in the manufacture of ultrahigh-temperature metal diborides-matrix ceramics (literal)

Abstract

• HfB(2) and (ZrB(2) + HfB(2))-based ceramics containing 19.5 vol% SiC particulate were developed from commercially available powders by hot-pressing. With the assistance of 3 vol% HfN as sintering aid, after hot-pressing at 1900 degrees C and 50 MPa of applied pressure, full density in both the composites was successfully achieved. The materials revealed a homogeneous microstructure, characterized by faceted diboride grains (2 mum average size) and SiC particles regularly dispersed. Limited levels of secondary phases were found. The thermomechanical properties of the composites were promising: about 22 GPa microhardness and 500 GPa Young's modulus for both. The HfB(2)-SiC composite showed values of strength of 650 +/- 50 and 465 +/- 40 MPa at 25 and 1500 degreesC, respectively. Likewise, the (ZrB(2)-HfB(2))-SiC composite exhibited values of strength of 765 +/- 20 and 250 +/- 45 MPa at 25 and 1500 degreesC, respectively. The excellent response at high temperature in air was attributed to the refractoriness of the phases constituting the composites and to the resistance to oxidation enhanced by the presence of the SiC particulate (literal)

Prodotto di

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Produzione, lavorazione e caratterizzazione di ceramici e compositi strutturali a progettazione funzionale (SP.P01.008.001) (Modulo)

Autore CNR

• ALIDA BELLOSI (Persona)
• FREDERIC TULLIO MONTEVERDE (Unità di personale interno)

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• Parole chiave di "Efficacy of HfN as sintering aid in the manufacture of ultrahigh-temperature metal diborides-matrix ceramics" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Produzione, lavorazione e caratterizzazione di ceramici e compositi strutturali a progettazione funzionale (SP.P01.008.001) (Modulo)

Autore CNR di

• ALIDA BELLOSI (Persona)
• FREDERIC TULLIO MONTEVERDE (Unità di personale interno)

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

• Journal of materials research (Rivista)

Insieme di parole chiave di

• Parole chiave di "Efficacy of HfN as sintering aid in the manufacture of ultrahigh-temperature metal diborides-matrix ceramics" (Insieme di parole chiave)