Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Self-healing EBC material for gas turbine applications

 
: Kunz, Willy; Klemm, Hagen

:

Singh, M.:
Advances in high temperature ceramic matrix composites and materials for sustainable development : Selected peer-reviewed papers from the 9th International Conference on High Temperature Ceramic Matrix Composites (HTCMC 9) and Global Forum on Advanced Materials and Technologies for Sustainable Development (GFMAT 2016); Toronto, Canada, June 26-30, 2016
Chichester: Wiley, 2017 (Ceramic Transactions 263)
ISBN: 978-1-119-40643-3
ISBN: 978-1-119-40753-9
S.173-185
International Conference on High Temperature Ceramic Matrix Composites (HTCMC) <9, 2016, Toronto>
Global Forum on Advanced Materials and Technologies for Sustainable Development (GFMAT) <2016, Toronto>
Englisch
Konferenzbeitrag
Fraunhofer IKTS ()
gas turbines; furnace oxidation; crack-healing effect; Ytterbium silicate; burner rig test

Abstract
This chapter examines Ytterbium bulk mono‐silicate with dispersed silicon carbide particles as a novel material concept of self‐healing EBCs for non‐oxide ceramic matrix composites. The ability of crack healing of the composite was analyzed during furnace oxidation and burner rig tests on pre‐cracked samples with 5 and 10 vol‐% SiC. Superior crack‐healing effects were observed in case of the 10 vol‐% SiC containing material especially after oxidation tests at 1200°C and 1400°C. A drastic increase of strength was measured on the pre‐cracked samples with 10 vol‐% SiC after oxidation in comparison to the samples after fabrication. The mechanism of crack healing was identified as a microstructural transformation as the consequence of SiC oxidation and subsequent reaction of the oxidation product SiO2 with the ytterbium silicate.

: http://publica.fraunhofer.de/dokumente/N-518494.html