Refractory oxynitride joints in silicon nitride

Autor:	F.M. Mahoney, Ronald E. Loehman, J.P. Pollinger, S.J. Glass, B. Quillan
Rok vydání:	1998
Předmět:	Materials science Polymers and Plastics Metallurgy Metals and Alloys Oxide chemistry.chemical_element Liquidus Nitride Nitrogen Electronic Optical and Magnetic Materials chemistry.chemical_compound Silicon nitride chemistry Ceramics and Composites Refractory (planetary science)
Zdroj:	Acta Materialia. 46:2393-2399
ISSN:	1359-6454
DOI:	10.1016/s1359-6454(98)80021-9
Popis:	Sintered silicon nitride was joined to itself by heating interlayers of refractory oxide compositions above their liquidus temperatures in flowing nitrogen. Only enough pressure was used to maintain alignment of the parts in the fixture. The oxide compositions were in the Y 2 O 3 - Al 2 O 3 - SiO 2 and SrO - Al 2 O 3 - SiO 2 families and the silicon nitride was from two commercial sources. Joined specimens were tested in four point flexure from room temperature to 1300°C. A maximum strength of 555 MPa was observed at 1000°C, which as far as we know is the highest 1000°C strength ever observed for silicon nitride joined without high applied pressure. Quantitative measurements of composition profiles at the ceramic-oxide-ceramic interface revealed that interdiffusion of cations from the silicon nitride and the oxide joining material maintains local charge balance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::983635a5a71357b2e878dc09713990cd https://doi.org/10.1016/s1359-6454(98)80021-9 Zobrazit plný text záznamu Full Text from ScienceDirect