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Tailored macro-pores during the formation of C/C-SiC via liquid phase pyrolysis

Title data

Flauder, Stefan ; Langhof, Nico ; Krenkel, Walter:
Tailored macro-pores during the formation of C/C-SiC via liquid phase pyrolysis.
In: Journal of the European Ceramic Society. Vol. 41 (2021) Issue 5 . - pp. 2995-3001.
ISSN 0955-2219
DOI: https://doi.org/10.1016/j.jeurceramsoc.2020.10.006

Abstract in another language

The synthesis of C/C-SiC via liquid silicon infiltration (LSI) with thermoplastic carbon precursors can lead to the formation of macro-pores in the C/C state. The macro-pore pattern formation can be controlled and used as a new level in microstructure for ceramic matrix composites. The pore formation occurs in the CFRP state with the re-melting of the thermoplastic matrix and can be fixed to the C/C state after liquid phase pyrolysis. The macro-pores are primarily induced by a non-linear elastic recovery of the fiber preform and not via gas formation and release during pyrolysis. The formation of the macro-porosity is described and explained. These pores can be tailored by process control in size and shape. The pore shapes can vary from isolated spherical pores to an interconnected tube like macro-pore network. The relationship between starting setting variables of the fiber preform, the process conditions, and the resulting structure are discussed.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: CMC; pore formation; tailored structure; C/C-SiC; deconsolidation
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Ceramic Materials
Faculties > Faculty of Engineering Science
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 01 Jun 2021 07:45
Last Modified: 01 Jun 2021 07:45
URI: https://eref.uni-bayreuth.de/id/eprint/65569