Transient-liquid-phase bonding of HfC-based ceramics (Comunicazione a convegno)

Type

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

Label

• Transient-liquid-phase bonding of HfC-based ceramics (Comunicazione a convegno) (literal)

Anno

• 2013-01-01T00:00:00+01:00 (literal)

Alternative label

• Laura Esposito, Diletta Sciti, Laura Silvestroni, Stefano Guicciardi, Noritaka Saito, Kunihiko Nakashima, Andreas M. Glaeser (2013)
  Transient-liquid-phase bonding of HfC-based ceramics
  in XIII ECerS Conference, Limoges Francia, 23-27 June, 2014
  (literal)

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

• Laura Esposito, Diletta Sciti, Laura Silvestroni, Stefano Guicciardi, Noritaka Saito, Kunihiko Nakashima, Andreas M. Glaeser (literal)

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

• CNR ISTEC, Department of Materials Science & Engineering Kyushu University Japan, Department of Materials Science and Engineering University of California (literal)

Titolo

• Transient-liquid-phase bonding of HfC-based ceramics (literal)

Abstract

• Transient-liquid-phase (TLP) bonding enables joining at a lower temperature compared to more traditional bonding techniques and since it preserves the potential for high-temperature applications, it is particularly attractive for ultra-high-temperature ceramics (UHTCs) such as carbides and borides. The feasibility of a TLP joint between pure carbides has been recently demonstrated.[1] Following those results the present work studies the interactions occurring during the TLP bonding of pure HfC or HfC doped with MoSi2 using a Ni/Nb/Ni multilayer interlayer. Bonding is performed at 1400°C for 30 min in a high-vacuum furnace equipped with refractory metal (W, Mo) elements and shields to minimize the potential for contamination. a contaminant-free atmosphere. Crack-free joints have been obtained with pure HfC and HfC doped with 5vol% MoSi2, whereas a higher amount of dopant (15vol %) led to fracture of the joint within the reaction layer. SEM-EDS characterization shows that the reaction layer formed at the interlayer/ceramic interface contains mixed carbides and Ni-Nb-Si alloys. When the reaction layer thickness exceeds a certain value, as in the case of the bond obtained with HfC doped with 15vol% MoSi2, residual stresses arise leading to the formation of cracks and eventually to the fracture of the bond. [1] L. Silvestroni, D. Sciti, L. Esposito and A.M. Glaeser, \"Joining of ultra-refractory carbides\" J. Eur. Ceram. Soc., 32 (2012) 4469-4479 (literal)

Prodotto di

• Materiali ceramici trasparenti per applicazioni ottiche ed elettromagnetiche (PM.P02.020.003) (Modulo)
• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Impatto antropico e ambientale sull'ecosistema marino (TA.P04.007.002) (Modulo)
• Marine science institute (ISMAR) (Istituto)

Autore CNR

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

Incoming links:

Prodotto

• Institute of science and technology for ceramics (ISTEC) (Istituto)
• Marine science institute (ISMAR) (Istituto)
• Impatto antropico e ambientale sull'ecosistema marino (TA.P04.007.002) (Modulo)
• Materiali ceramici trasparenti per applicazioni ottiche ed elettromagnetiche (PM.P02.020.003) (Modulo)

Autore CNR di

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