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Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement

Mainzer, Bernd and Chaorong, Lin and Friess, Martin and Riedel, Ralf and Riesch, Johann and Feichtmayer, Alexander and Fuhr, Maximilian and Almanstötter, Jürgen and Koch, Dietmar (2019) Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement. Journal of the European Ceramic Society. Elsevier. doi: 10.1016/j.jeurceramsoc.2019.10.049. ISSN 0955-2219.

[img] PDF - Postprint version (accepted manuscript)

Official URL: https://doi.org/10.1016/j.jeurceramsoc.2019.10.049


Ceramic matrix composites usually utilize carbon or ceramic fbers as reinforcements. However, such fbers often expose a low ductility during failure. In this work, we follow the idea of a reinforcement concept of a ceramic matrix reinforced by refractory metal fbers to reach pseudo ductile behavior during failure. Tungsten and molybdenum fbers were chosen as reinforcement in SiCN ceramic matrix composites manufactured by polymer infltration and pyrolysis process. The composites were investigated with respect to microstructure, flexural- and tensile strength. The single fber strengths for both tungsten and molybdenum were investigated and compared to the strength of the composites. Tensile strengths of 206 and 156 MPa as well as bending strengths of 427 and 312 MPa were achieved for W/SiCN and Mo/SiCN composites, respectively. The W fber became brittle across the entire cross section, while the Mo fber showed a superfcial, brittle reaction zone but kept ductile on the inside.

Item URL in elib:https://elib.dlr.de/133171/
Document Type:Article
Title:Novel ceramic matrix composites with tungsten and molybdenum fiber reinforcement
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Mainzer, Berndbernd.mainzer (at) dlr.deUNSPECIFIED
Friess, MartinMartin.Friess (at) dlr.dehttps://orcid.org/0000-0002-4425-8244
Riedel, RalfTU DarmstadtUNSPECIFIED
Riesch, JohannMPI GarchingUNSPECIFIED
Feichtmayer, AlexanderMPI GarchingUNSPECIFIED
Fuhr, MaximilianMPI GarchingUNSPECIFIED
Almanstötter, JürgenOsramUNSPECIFIED
Koch, DietmarDietmar.Koch (at) dlr.dehttps://orcid.org/0000-0003-4504-8721
Date:31 October 2019
Journal or Publication Title:Journal of the European Ceramic Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.jeurceramsoc.2019.10.049
Keywords:Tungsten Molybdenum SiCN CMC Polysilazane PIP
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Friess, Dr.rer.nat. Martin
Deposited On:02 Jan 2020 11:12
Last Modified:02 Jan 2020 11:12

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