Spark Plasma Sintering of Multilayer Ceramics – Case Study of Al2O3 - Mg(Ca)TiO3 Sandwich

0428489 - ÚFP 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Ctibor, Pavel - Kubatík, Tomáš František - Chráska, Pavel
Spark Plasma Sintering of Multilayer Ceramics – Case Study of Al2O3 - Mg(Ca)TiO3 Sandwich.
Key Engineering Materials. Vol. 606. Zurich: Trans Tech Publications Ltd, 2014 - (Haušíld, P.; Materna, A.; Vilémová, M.), s. 205-208. ISSN 1662-9795.
[International Conference on Local Mechanical Properties, LMP 2013/10./. Kutná Hora (CZ), 06.11.2013-08.11.2013]
Institucionální podpora: RVO:61389021
Klíčová slova: Al2O3 - Mg(Ca)TiO3 * Sandwich ceramics * Spark Plasma Sintering
Kód oboru RIV: JH - Keramika, žáruvzdorné materiály a skla
http://www.scientific.net/KEM.606.205

Spark plasma sintering enables very rapid fabrication of bulk ceramic materials. Suitability of this technique for preparing of multilayer ceramic discs is up to now relatively seldom reported.Our work is focused on a bi-layered disc consisting of thick Al2O3 layer and comparably thick Mg(Ca)TiO3 (MCT) layer sintered in one run.Al2O3 powder was nanometric (less than 40 nm) and composed of the hexagonal α-phase whereas MCT is a solid solution of two orthorombic perovskites.Pre-sintered and crushed MCT powder was coarser than alumina, up to 125 μm.The purpose of this material combination was creating of dielectric sandwich consisting of capacitor MCT material and resistor nanoalumina material.Spark plasma sintering run was done at 1200 °C, using pressure 80 MPa and dwell time only 2min.Resulting sandwich was subjected to microstructural observations and cross sectional measurement of microhardness.On the border between Al2O3 and MCT the microhardness was higher than in MCT but has
Trvalý link: http://hdl.handle.net/11104/0233843