Influence of powder characteristics and powder processing routes on microstructure and properties of hot pressed silicon nitride materials (Articolo in rivista)

Type

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

Label

• Influence of powder characteristics and powder processing routes on microstructure and properties of hot pressed silicon nitride materials (Articolo in rivista) (literal)

Anno

• 2001-01-01T00:00:00+01:00 (literal)

Alternative label

• A. Bondanini, F. Monteverde, A. Bellosi (2001)
  Influence of powder characteristics and powder processing routes on microstructure and properties of hot pressed silicon nitride materials
  in Journal of materials science (Dordr., Online)
  (literal)

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

• A. Bondanini, F. Monteverde, A. Bellosi (literal)

Pagina inizio

• 4851 (literal)

Pagina fine

• 4862 (literal)

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

• 36 (literal)

Rivista

• Journal of materials science (Rivista)

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

• 9 (literal)

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

• 20 (literal)

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

• ISTEC-CNR (literal)

Titolo

• Influence of powder characteristics and powder processing routes on microstructure and properties of hot pressed silicon nitride materials (literal)

Abstract

• Four different commercial Si3N4 powders were hot pressed with the addition of La2O3 and Y2O3 as sintering aids. Two powder processing routes were set up: addition of sintering aid powders by ultrasonic dispersion, addition of nanodispersed amorphous additive species by chemical coprecipitation. The following aspects were analyzed: characteristics of starting powders and powder mixtures, with reference to surface modification (electrokinetic behaviour and surface properties) induced by the powder treatment;sintering behaviour of the powder mixtures; influence of raw powders characteristics and processing route on microstructure and properties of dense materials. The microstructural characteristics of hot pressed materials (grain size, aspect ratio, grain boundary phases) were found to be dependent on powder characteristics and its process history. Significant variation of the mechanical properties (Young modulus, hardness, toughness and strength) were related to microstructural features. Strength, for example, ranges from 600 to 1200 MPa at room temperature and from 400 to 1000 MPa at 1200oC; toughness ranges from about 4 to about 6 MPam1/2. (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)

Insieme di parole chiave

• Keywords of "Influence of powder characteristics and powder processing routes on microstructure and properties of hot pressed silicon nitride materials" (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 science (Rivista)

Insieme di parole chiave di

• Keywords of "Influence of powder characteristics and powder processing routes on microstructure and properties of hot pressed silicon nitride materials" (Insieme di parole chiave)