BONDING SILICON-NITRIDE USING GLASS-CERAMIC
UNSPECIFIED (1995) BONDING SILICON-NITRIDE USING GLASS-CERAMIC. In: 10th Irish-Materials-Forum Conference (IMF10), SEP, 1994, UNIV ULSTER, COLERAINE, NORTH IRELAND.Full text not available from this repository.
Silicon nitride has been successfully bonded to itself using magnesium-aluminosilicate glass and glass-ceramic. For some samples, bonding was achieved using a diffusion bonder, but in other instances, following an initial degassing hold, higher temperatures were used in a nitrogen atmosphere with no applied load. For diffusion bonding, a small applied pressure at a temperature below which crystallisation occurs resulted in intimate contact. At slightly higher temperatures, the extent of the reaction at the interface and the microstructure of the glass-ceramic joint was highly sensitive to the bonding temperature. Bonding in a nitrogen atmosphere resulted in a solution-reprecipitation reaction. A thin layer of glass produced a ''dry'', glass-free joint, whilst a thicker layer resulted in a continuous glassy join across the interface. The chromium silicide impurities within the silicon nitride react with the nucleating agent in the glass ceramic, which may lead to difficulty in producing a fine glass-ceramic microstructure. Slightly lower temperatures in nitrogen resulted in a polycrystalline join but the interfacial contact was poor. It is hoped that one of the bonds produced may be developed to eventually form part of a graded joint between silicon nitride and a high temperature nickel alloy.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||T Technology > TP Chemical technology
T Technology > TA Engineering (General). Civil engineering (General)
|Series Name:||KEY ENGINEERING MATERIALS|
|Journal or Publication Title:||ADVANCES IN ENGINEERING MATERIALS|
|Publisher:||TRANS TECH PUBLICATIONS|
|Editor:||Hampshire, S and Buggy, M and Meenan, B and Brown, N|
|Number of Pages:||8|
|Page Range:||pp. 233-240|
|Title of Event:||10th Irish-Materials-Forum Conference (IMF10)|
|Location of Event:||UNIV ULSTER, COLERAINE, NORTH IRELAND|
|Date(s) of Event:||SEP, 1994|
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