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Behavior of ceramics at 1200 C in a simulated gas turbine environmentThis report summarizes programs at the NASA Lewis Research Center evaluating several classes of commercial ceramics, in a high gas velocity burner rig simulating a gas turbine engine environment. Testing of 23 ceramics in rod geometry identified SiC and Si3N4 as outstanding in resistance to oxidation and thermal stress and identified the failure modes of other ceramics. Further testing of a group of 15 types of SiC and Si3N4 in simulated vane shape geometry has identified a hot pressed SiC, a reaction sintered SiC, and hot pressed Si3N4 as the best of that group. SiC and Si3N4 test specimens were compared on the basis of weight change, dimensional reductions, metallography, fluorescent penetrant inspection, X-ray diffraction analyses, and failure mode.
Document ID
19740044756
Document Type
Conference Paper
Authors
Sanders, W. A.
Probst, H. B. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 7, 2013
Publication Date
February 1, 1974
Subject Category
MATERIALS, NONMETALLIC
Report/Patent Number
SAE PAPER 740240
Meeting Information
Automotive Engineering Congress(Detroit, MI)
Distribution Limits
Public
Copyright
Other