Solid-gas reaction during sintering of Si3N4 ceramics (Part 6) - Suppression of mass loss reaction during sintering

Citation
K. Yokoyama et S. Wada, Solid-gas reaction during sintering of Si3N4 ceramics (Part 6) - Suppression of mass loss reaction during sintering, J CERAM S J, 109(3), 2001, pp. 238-243
Citations number
10
Language
GIAPPONESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
ISSN journal
0914-5400 → ACNP
Volume
109
Issue
3
Year of publication
2001
Pages
238 - 243
Database
ISI
SICI code
0914-5400(200103)109:3<238:SRDSOS>2.0.ZU;2-B
Abstract
Effect of Si3N4/SiO2/BN packing powder and Si3N4/SiO2 powder compacts, whic h produce SiO gas atmosphere upon heating were investigated for suppressing mass loss in Si3N4 ceramics during sintering in 0.1 MPa N-2 atmosphere. As a result, packing powder with larger SiO2 particles effectively suppressed the generation of SiO gas according to mass loss reaction from the samples , Upon sintering with Si3N4/SiO2/BN packing powder and Si3N4/SiO2 powder co mpacts, a surface porous layer with several hundreds micrometer thick which generated under the condition of Si3N4/BN mixed powder bed or without powd er bed at long soaking time in 0.1 MPa N-2, was not observed at all. The cr oss-sectional morphologies under this experimental condition were comparabl e to those under 1 MPa N-2.