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Mo- and W-Fiber Reinforced SiCN Ceramic Matrix Composites based on PIP process

Friess, Martin and Mainzer, Bernd and Koch, Dietmar and Lin, Chaorong and Riedel, Ralf and Riesch, Johann and Feichtmayer, Alexander and Almanstötter, Jürgen (2019) Mo- and W-Fiber Reinforced SiCN Ceramic Matrix Composites based on PIP process. 2nd NSF-PIRE-PDC Workshop, 15.-19. Juli 2019, Boulder, CO (USA).

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Abstract

Mo- and W-fiber reinforced CMCs can be easily manufactured via polymer infiltration and pyrolysis at 1300 °C (PIP) Mo/SiCN and W/SiCN composites are light-weight in comparison to Mo/Mo and W/W composites Mo/SiCN and W/SiCN show increased fracture strain compared to CMCs Mo/SiCN and W/SiCN can be considered as WMCs and thus need no weak interphase Microstructural and phase analyses have shown that Mo- and W-fibers are still present and thermally resistant in the SiCN matrix even at 1300 °C Thermodynamical calculations strongly recommend an additional fiber coating from C-attack! Microstructural and phase analyses have shown that Mo- and W-fibers suffer from surfacial attack, mainly by C-based materials Applying a coating as reaction barrier (e.g. Y2O3) should provide further improvement in mechanical properties New applications are feasible due to: increased fracture strain good tensile and fracture strain high stiffness high thermal conductivity low thermal expansion high thermal shock resistance anisotropic behaviour of composite according to tailor-made design

Item URL in elib:https://elib.dlr.de/133174/
Document Type:Conference or Workshop Item (Speech)
Title:Mo- and W-Fiber Reinforced SiCN Ceramic Matrix Composites based on PIP process
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Friess, MartinMartin.Friess (at) dlr.dehttps://orcid.org/0000-0002-4425-8244
Mainzer, Berndbernd.mainzer (at) dlr.deUNSPECIFIED
Koch, DietmarDietmar.Koch (at) dlr.dehttps://orcid.org/0000-0003-4504-8721
Lin, ChaorongUNSPECIFIEDUNSPECIFIED
Riedel, RalfTU DarmstadtUNSPECIFIED
Riesch, JohannMPI GarchingUNSPECIFIED
Feichtmayer, AlexanderMPI GarchingUNSPECIFIED
Almanstötter, JürgenOsramUNSPECIFIED
Date:15 July 2019
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CMC, SiCN, PIP, Mo, W
Event Title:2nd NSF-PIRE-PDC Workshop
Event Location:Boulder, CO (USA)
Event Type:Workshop
Event Dates:15.-19. Juli 2019
Organizer:University of Colorado
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
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 11:22
Last Modified:02 Jan 2020 11:22

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