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Frisk, Lars
Publications (2 of 2) Show all publications
Mouzon, J., Maitre, A., Frisk, L., Lehto, N. & Odén, M. (2009). Fabrication of transparent yttria by HIP and the glass-encapsulation method (ed.). Paper presented at . Journal of the European Ceramic Society, 29(2), 311-316
Open this publication in new window or tab >>Fabrication of transparent yttria by HIP and the glass-encapsulation method
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2009 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 29, no 2, p. 311-316Article in journal (Refereed) Published
Abstract [en]

This method consists of a combination of vacuum sintering at 1600 °C followed by hot isostatic pressing (HIP) at 1500 °C of a highly agglomerated commercial powder. The use of evacuated glass capsules to perform HIP treatment allowed samples that showed open porosity after vacuum sintering to be sintered to transparency. The sintering response of the investigated powder was studied by careful microstructural observations using scanning electron microscopy and optical microscopy both in reflection and transmission. The successful key of this method was to keep porosity intergranular during pre-sintering, so that it can be removed subsequently by HIP treatment. It was found that agglomerates of closely packed particles are helpful to reach that purpose, since they densify fully and leave only intergranular porosity. However, performing HIP treatment at 1625 °C was found to result in opaque samples. This was attributed to the diffusion of argon inside the capsule. Contamination at different steps of processing was also investigated by inductively coupled plasma mass spectrometry (ICP-MS).

National Category
Chemical Process Engineering Other Materials Engineering Other Physics Topics
Research subject
Chemical Technology; Engineering Materials; Fysik
Identifiers
urn:nbn:se:ltu:diva-7935 (URN)10.1016/j.jeurceramsoc.2008.03.022 (DOI)000261537500013 ()2-s2.0-54349086866 (Scopus ID)65fbdbd0-7377-11dd-a60f-000ea68e967b (Local ID)65fbdbd0-7377-11dd-a60f-000ea68e967b (Archive number)65fbdbd0-7377-11dd-a60f-000ea68e967b (OAI)
Note
Validerad; 2009; 20080826 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Antti, M.-L., Frisk, L., Warren, R. & P, P. V. (1999). Synthesising of a model composite in the oxide/oxide system: alumina fibre reinforced alumina matrix (ed.). In: (Ed.), (Ed.), Advanced structural fiber composites: . Paper presented at Advanced structural fiber composites (Topical symposium 5) : 14/06/1998 - 19/06/1998. : TECHNA Srl
Open this publication in new window or tab >>Synthesising of a model composite in the oxide/oxide system: alumina fibre reinforced alumina matrix
1999 (English)In: Advanced structural fiber composites, TECHNA Srl , 1999Conference paper, Published paper (Refereed)
Abstract [en]

Ceramic matrix composites have attracted big interest as potential material for high temperature applications. To avoid one of the main problems, namely oxidation at higher temperatures, interest has increased for systems where both reinforcement and matrix material are ceramic oxides. This work presents a possible method of producing long fibre reinforced ceramic matrix composites. The method was applied to single crystal aluminium oxide fibres in a polycrystalline alumina matrix and involves cladding individual fibres with the matrix material in the form of pre-sintered tubes with appropriately small diameter. The composite is then hot isostatically pressed (HIP), by putting several fibre-tube pairs in a container of required diameter. A HIP cycle was found that led to full densification of the composite without visual damage to the fibres. The method produces composites with an ideal uniform fibre spacing; samples of cylindrical shape suitable, for example, for uniaxial testing can be produced

Place, publisher, year, edition, pages
TECHNA Srl, 1999
Series
Advances in science and technology ; 22
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
urn:nbn:se:ltu:diva-35511 (URN)a0fb6160-fd58-11db-b816-000ea68e967b (Local ID)88-86538-23-5 (ISBN)a0fb6160-fd58-11db-b816-000ea68e967b (Archive number)a0fb6160-fd58-11db-b816-000ea68e967b (OAI)
Conference
Advanced structural fiber composites (Topical symposium 5) : 14/06/1998 - 19/06/1998
Note
Godkänd; 1999; Bibliografisk uppgift: CIMTEC. World Ceramics Congress and Forum on New Materials (9th); 20070508 (cira)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
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