Change search
ReferencesLink to record
Permanent link

Direct link
Compositional gradation between silicon nitride and superalloys using Si3N4/TiN CMC and TiN/Ni MMC layers
Luleå tekniska universitet.
1994 (English)In: Proceedings: 3rd International Symposium on Structural and Functional Gradient Materials, [FGM '94], 10-12 October 1994, Swiss Federal Institute of Technology of Lausanne, Switzerland / [ed] Bernhard Ilschner, Lausanne: Swiss Federal Institute of Technology , 1994, 495-501 p.Conference paper (Refereed)
Abstract [en]

Graded Si3N4/TiN ceramic matrix composites (CMC) and TiN/Ni metal matrix composites (MMC) were prepared by HIP for a joint piece concept, aimed at reducing residual stresses between Si3N4 and Incoloy 909, as part of a Brite/EuRam project concerning the development of graded structures. To reduce the coefficient of thermal expansion (CTE) mismatch between the graded CMC and MMC joint pieces, the CTE at the TiN-rich side of the graded MMC should be as close as possible to that of pure TiN. Due to abnormal grain growth in the superalloy at higher temperatures, the HIP temperature for simultaneous joining and densification in the solid state of the TiN/Ni MMC is limited to 980 C. Regarding layers with low Ni matrix content, it was therefore considered necessary to develop powder preparation methods giving useful relative density and strength levels after HIP for minimized Ni contents and CTE levels. Ni-coated TiN powders were shown to be useful for this purpose, and results concerning densities and microstructures of TiN/Ni MMC materials, as well as CTE behavior of relevant Si3N4/TiN CMC and TiN/Ni MMC compositions, are presented

Place, publisher, year, edition, pages
Lausanne: Swiss Federal Institute of Technology , 1994. 495-501 p.
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-40753Local ID: fff8c0c0-8d86-11de-8da0-000ea68e967bISBN: 2880742900OAI: oai:DiVA.org:ltu-40753DiVA: diva2:1014274
Conference
International Symposium on Structural and Functional Gradient Materials : 10/10/1994 - 12/10/1994
Note
Godkänd; 1994; 20090820 (andbra)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

Open Access in DiVA

No full text

Search outside of DiVA

GoogleGoogle Scholar

Total: 10 hits
ReferencesLink to record
Permanent link

Direct link