elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Design, Manufacture and Quality Assurance of C/C-SiC Composites for Aeronautics and Space Transportation Systems

Krenkel, W. and Hausherr, J. and Frieß, M. and Reimer, T. (2004) Design, Manufacture and Quality Assurance of C/C-SiC Composites for Aeronautics and Space Transportation Systems. 28 th International Cocoa Beach Conference and Exposition on Advanced Ceramics & Composites, Cocoa Beach, Florida, USA, 25-30.01.2004.

Full text not available from this repository.

Abstract

Ceramic Matrix Composites, manufactured via the Liquid Silicon Infiltration (LSI) process, show a wide variability of microstructures, thermal and mechanical properties. Depending on the fiber preform and the processing conditions, these C/C-SiC composites can be tailored to specific applications. Generally, the high amounts of carbon fibers limit their use with unprotected surfaces under oxidative atmospheres to some few hours. External coatings, for example those based on CVD-SiC, RB-SiC or yttrium silicate, improve the oxidation as well as abrasion resistance of C/C-SiC considerably. Nevertheless, carbon-based CMCs are preferred materials for limited lifetime structures, i.e. a certain degree of ablation and erosion has to be accepted. As a consequence, non destructive evaluation tests are obligatory to survey the respective state of the material. Moreover, new and adapted NDE-methods have been investigated to assure the quality of the composite during the three-step LSI-process. For example, using novel air-coupled ultrasonics, it is possible to examine the CMC product at every manufacture step, including the highly porous carbon-carbon phase. This permits an almost complete analysis of the whole LSI process and enables an early detection of faults. Another novel approach for quality assurance are thermographic methods, which allow a fast global damage assessment by analyzing the heat transfer into the component. Both, the thermographic analysis and air-coupled ultrasonics, are non-contact methods for damage assessment and can be used in any stage of production. Additionally, a current technology project of DLR’s space research will be described. An experimental TPS structure which is planned to be launched with a Russian FOTON capsule, has been designed and manufactured to evaluate different coating materials under reentry conditions. Chemical vapor deposited SiC, low pressure plasma sprayed yttrium silicate and titanium dioxide coatings were applied on the surface of a C/C-SiC panel of 300 mm diameter. The paper deals with different aspects of the design, manufacture and quality assurance of C/C-SiC composites with respect to their use in jet vanes of rocket motors and for thermal protection systems.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Design, Manufacture and Quality Assurance of C/C-SiC Composites for Aeronautics and Space Transportation Systems
Authors:
AuthorsInstitution or Email of Authors
Krenkel, W.UNSPECIFIED
Hausherr, J.UNSPECIFIED
Frieß, M.UNSPECIFIED
Reimer, T.UNSPECIFIED
Date:2004
Status:Published
Keywords:CMC, composites, ceramic, LSI, liquid silicon infiltration, applications, design, manufacture, quality assurance, coating
Event Title:28 th International Cocoa Beach Conference and Exposition on Advanced Ceramics & Composites, Cocoa Beach, Florida, USA, 25-30.01.2004
Organizer:The American Ceramic Society
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 13:24

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.