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Creep and Cyclic Fatigue Durability of 3D Woven SiC/SiC Composites with (CVI+PIP) Hybrid MatrixSiC-SiC composites are potential candidate materials for turbine components such as combustor liners, nozzle vanes and blades because of their low density, high temperature capability, and tailorable mechanical properties. The first generation of SiC-SiC composites fabricated by melt infiltration are being introduced in current engines. These materials are limited to 1315 degrees Centigrade applications because of the presence of residual silicon in the SiC matrix. Currently there is an increasing interest in developing SiC-SiC composites without silicon for structural aerospace applications above 1315 degrees Centigrade. The developmental 3D woven SiC-SiC composites with Chemical Vapor Infiltration plus Polymer Impregnation and Pyrolysis (CVI+PIP) hybrid matrix show potential for 1482 degrees Centigrade applications. In this study 3D woven SiC-SiC composite specimens were creep tested at 1482 degrees Centigrade at different stress levels until failure or for 1000 hours without failure. The failed specimens were analyzed for under a scanning electron microscope to assess the damage mechanisms. The creep data of 3D woven SiC-SiC composites with (CVI+PIP) hybrid matrix were compared with those of full CVI SiC-SiC composites and sintered SiC from the literature. The potential benefits limitations and durability of 3D woven SiC-SiC composites for turbine applications will be discussed.
Document ID
20180003480
Document Type
Presentation
Authors
Bhatt, R. T. (Ohio Aerospace Inst. Cleveland, OH, United States)
Date Acquired
June 6, 2018
Publication Date
November 5, 2017
Subject Category
Composite Materials
Aircraft Design, Testing and Performance
Report/Patent Number
GRC-E-DAA-TN47880
Meeting Information
Advanced Ceramic Matrix Composites: Science and Technology of Materials, Design, Applications, Performance and Integration (An Engineering Conferences International (ECI) Conference)(Sante Fe, NM)
Funding Number(s)
CONTRACT_GRANT: NNC13BA10B
WBS: WBS 109492.02.03.02.02.01
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
creep durability
SiC/SiC composites

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