Rheological behaviour and thermal dilation effects of alumino-silicate adhesives intended for joining of high-temperature resistant sandwich structures

0478515 - ÚSMH 2018 RIV GB eng J - Journal Article
Černý, Martin - Chlup, Zdeněk - Strachota, Adam - Schweigstillová, Jana - Svítilová, Jaroslava - Halasová, Martina
Rheological behaviour and thermal dilation effects of alumino-silicate adhesives intended for joining of high-temperature resistant sandwich structures.
Journal of the European Ceramic Society. Roč. 37, č. 5 (2017), s. 2209-2218. ISSN 0955-2219. E-ISSN 1873-619X
R&D Projects: GA ČR GAP107/12/2445
Grant - others:OPPK(XE) CZ.2.16/3.1.00/21538
Program: OPPK
Institutional support: RVO:67985891 ; RVO:68081723 ; RVO:61389013
Keywords : Sandwich * Inorganic adhesive * Si-O-C ceramics * Ceramic foam * Ceramic fibre
OECD category: Ceramics; Polymer science (UMCH-V); Ceramics (UFM-A)
Impact factor: 3.794, year: 2017

The study is concerned with inorganic adhesive layers located between the CMC composite skin and the Si-O-C ceramic foam core of sandwiches intended for high-temperature use. Two types of aluminosilicate adhesives (mastics) were tested for use as the bonding layer. The rheological properties of adhesive and its dimensional changes during high-temperature curing play a key role in terms of successful manufacture and subsequent use at high temperatures. In order to characterise these properties, specimens consisting only of the dried adhesive were subjected to compression tests conducted at increasing temperature from 300 to 1000 degrees C. These experiments were carried out via the application of two loading modes using both the static pre-load and cyclic loading methods. The above results were compared with thermal expansion records determined from fully-cured adhesives. In addition to the above investigation, the mechanical properties of the adhesive joint were measured employing both the DCB and shear tests.
Permanent Link: http://hdl.handle.net/11104/0274620