THERMODYNAMIC MODELING OF WETTING AT SILICON-NITRIDE NI-CR-SI ALLOY INTERFACES

Authors
HADIAN AM DREW RAL
Citation
Am. Hadian et Ral. Drew, THERMODYNAMIC MODELING OF WETTING AT SILICON-NITRIDE NI-CR-SI ALLOY INTERFACES, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 189(1-2), 1994, pp. 209-217
Citations number
24
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
189
Issue
1-2
Year of publication
1994
Pages
209 - 217
Database
ISI
SICI code
0921-5093(1994)189:1-2<209:TMOWAS>2.0.ZU;2-1
Abstract
Through thermodynamic modelling of the reaction at ceramic-metal inter face, wetting of a sintered silicon nitride was investigated with a se ries of Ni-based brazing alloys without addition of active elements. T he thermodynamic calculations showed that Ni-Cr-Si alloys with Ni/Cr r atio of 3.5 and X(Si) <0.25 will react with and wet Si3N4 ceramics at 1220 degrees C (1493 K) and P-N2 = 15 Pa. Environmental verifications using sessile drop method con firmed the validity of the calculations and the assumptions made in the wetting model.