TECHNICAL PAPERS: Gas Turbines: Ceramics

Modeling the Thermostructural Capability of Continuous Fiber-Reinforced Ceramic Composites

[+] Author and Article Information
J. A. DiCarlo, H. M. Yun

NASA Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135

J. Eng. Gas Turbines Power 124(3), 465-470 (Jun 19, 2002) (6 pages) doi:10.1115/1.1470480 History: Received November 01, 1999; Revised February 01, 2000; Online June 19, 2002
Copyright © 2002 by ASME
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Larson-Miller master curves for the time/temperature-dependent rupture strength of single-oxide and SiC-based fibers and single multifilament tows as measured in air (a) from ambient to high temperature and (b) at high temperatures
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Predicted rupture strength behavior and measured stress-rupture data for Hi-Nicalon and Syl-2 reinforced CMC tested at high temperatures in air. Solid and dashed curves are based, respectively, on the single-fiber and bonded-tow LM curves of Fig. 1.
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Predicted maximum rupture strength capability for cracked 0/90 CMC reinforced by the most creep-resistant oxide and SiC-based fiber types currently available (Vf*=20%). For comparison, measured strength curves are shown for a state-of-the-art nickel-based superalloy and for two types of monolithic ceramics.
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Effective 1000-hour rupture strength predicted for cracked SiC/SiC CMC with Syl-2 fibers that fracture independently and a cracked SiC/SiC CMC with oxide-bonded Sylramic fibers. Solid curves=no recession; dashed curves=lean-burn combustion (19). For comparison, strength curves are shown for a nickel-based superalloy (measured) and an oxide/oxide CMC (predicted).




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