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Characterization and application of a novel low viscosity polysilazane for the manufacture of C- and SiC-fiber reinforced SiCN ceramic matrix composites by PIP process

Mainzer, Bernd and Lin, Chaorong and Jemmalia, Raouf and Friess, Martin and Riedel, Ralf and Koch, Dietmar (2019):
Characterization and application of a novel low viscosity polysilazane for the manufacture of C- and SiC-fiber reinforced SiCN ceramic matrix composites by PIP process.
In: Journal of the European Ceramic Society, Elsevier Science Ltd, England, pp. 212-221, 39, (2-3), ISSN 09552219,
DOI: 10.1016/j.jeurceramsoc.2018.09.042,
[Online-Edition: https://www.sciencedirect.com/science/article/abs/pii/S09552...],
[Article]

Abstract

Four unidirectional fiber reinforced SiCN ceramic matrix composites were manufactured by means of polymer infiltration and pyrolysis. Two carbon fibers (T800H and Granoc XN90) as well as two silicon carbide fibers (Tyranno ZMI and SA3) without fiber coating were chosen. As matrix precursor, a poly(methylvinyl)silazane was investigated and utilized. The composites with the SA3 and the XN90 fiber had the highest tensile strengths of 478 and 288 MPa, respectively. It is considered that these high modulus fibers with the low modulus SiCN matrix create weak matrix composites. After exposure to air (T = 1200 degrees C, 10 h), a significant decrease of the mechanical properties was found, caused by the burnout of carbon fibers and the oxidation through open pores stemming from the PIP process and SiCN/SiCN interfaces in case of the SiC fiber based composites.

Item Type: Article
Erschienen: 2019
Creators: Mainzer, Bernd and Lin, Chaorong and Jemmalia, Raouf and Friess, Martin and Riedel, Ralf and Koch, Dietmar
Title: Characterization and application of a novel low viscosity polysilazane for the manufacture of C- and SiC-fiber reinforced SiCN ceramic matrix composites by PIP process
Language: English
Abstract:

Four unidirectional fiber reinforced SiCN ceramic matrix composites were manufactured by means of polymer infiltration and pyrolysis. Two carbon fibers (T800H and Granoc XN90) as well as two silicon carbide fibers (Tyranno ZMI and SA3) without fiber coating were chosen. As matrix precursor, a poly(methylvinyl)silazane was investigated and utilized. The composites with the SA3 and the XN90 fiber had the highest tensile strengths of 478 and 288 MPa, respectively. It is considered that these high modulus fibers with the low modulus SiCN matrix create weak matrix composites. After exposure to air (T = 1200 degrees C, 10 h), a significant decrease of the mechanical properties was found, caused by the burnout of carbon fibers and the oxidation through open pores stemming from the PIP process and SiCN/SiCN interfaces in case of the SiC fiber based composites.

Journal or Publication Title: Journal of the European Ceramic Society
Volume: 39
Number: 2-3
Publisher: Elsevier Science Ltd, England
Uncontrolled Keywords: SiC/SiCN; C/SiCN; Polysilazane; PIP; Interface MULTILAYERED INTERPHASES; MECHANICAL-PROPERTIES; SIC/SIC COMPOSITE; CARBON-FIBERS; N CERAMICS; BEHAVIOR; (PYC/SIC)(N)
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 03 Dec 2018 14:49
DOI: 10.1016/j.jeurceramsoc.2018.09.042
Official URL: https://www.sciencedirect.com/science/article/abs/pii/S09552...
Funders: Bundesministerium fur Bildung und Forschung (Germany) , Grant Number 03EK3544
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