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Oxidation and Thermal Fatigue of Coated and Uncoated NX-188 Nickel-base Alloy in a High-velocity Gas Stream

出版	National Aeronautics and Space Administration, 1972
URL	http://books.google.com.hk/books?id=VPhQwPYmoXMC&hl=&source=gbs_api

註釋A cast nickel-base superalloy, NX-188, coated and uncoated, was tested in a high-velocity gas stream for resistance to oxidation and thermal fatigue by cycling between room temperature and 980, 1040, and 1090 C. Contrary to the behavior of more conventional nickel-base alloys, uncoated NX-188 exhibited the greatest weight loss at the lowest test temperature. In general, on the basis of weight change and metallographic observations a coating consisting of vapor-deposited Fe-Cr-Al-Y over a chromized substrate exhibited the best overall performance in resistance to oxidation and thermal fatigue.