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Oxidation-induced microstructural changes of a polymer-derived NextelTM 610 ceramic composite and impact on the mechanical performance

Volkmann, Eike and Evangelista, L. Lima and Tushtev, Kamen and Koch, Dietmar and Wilhelmi, Christian and Rezwan, Kurosch (2014) Oxidation-induced microstructural changes of a polymer-derived NextelTM 610 ceramic composite and impact on the mechanical performance. Journal of Materials Science, 49, pp. 710-719. Springer. DOI: 10.1007/s10853-013-7752-4 ISSN 0022-2461

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Abstract

This study analyses the effects of heat treatments in oxidative atmosphere on the mechanical and microstructural properties of a fiber-reinforced weak interface composite (UMOXTM) which is composed of a mullite-SiOC matrix and NextelTM 610 fibers with fugitive coatings. Composites of different porosity grades, depending on the polymer infiltration and pyrolysis cycle, are exposed to 1000 and 1200 �C for 50 h. The exposure provokes the formation of silica, which leads to matrix densification and the formation of silica bridges at the fiber–matrix interface, resulting in an increased interfacial bonding strength. Consequently, the fracture toughness and the flexural strength are significantly reduced. The study confirms that SiOC-based materials are suitable for an application at high temperatures in oxygen-rich atmospheres up to 1000 �C. It is, however, important to consider the microstructural changes and thereby induced decrease of the overall mechanical performance during a hightemperature use.

Item URL in elib:https://elib.dlr.de/93488/
Document Type:Article
Title:Oxidation-induced microstructural changes of a polymer-derived NextelTM 610 ceramic composite and impact on the mechanical performance
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Volkmann, EikeUniversität BremenUNSPECIFIED
Evangelista, L. LimaUniversität BremenUNSPECIFIED
Tushtev, KamenUniversität BremenUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Wilhelmi, ChristianEADS Innovation WorksUNSPECIFIED
Rezwan, KuroschUniversität BremenUNSPECIFIED
Date:2014
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:49
DOI :10.1007/s10853-013-7752-4
Page Range:pp. 710-719
Publisher:Springer
ISSN:0022-2461
Status:Published
Keywords:Ceramic Matrix Composite oxide fiber oxidation Polymer pyrolysis mechanical properties
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Wiederverwendbare Raumfahrtsysteme und Antriebstechnologie
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Koch, Dietmar
Deposited On:22 Dec 2014 16:18
Last Modified:06 Sep 2019 15:27

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