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Use of aluminum as an oxidation barrier for titaniumA study is conducted of the use of aluminum coatings as oxidation retardants for Ti alloys, using room temperature normal emittance and spectral emittance as bases for the characterization of oxidation properties with and without the coatings. Thermal exposures were conducted in a thermogravimetric analysis apparatus in which specimen weight was continuously monitored. The results obtained indicate that the weight gains are proportional to the square root of the time for uncoated alloys and for 649 C-exposed aluminum-coated alloys. For the 704 C-exposed aluminum-coated alloys, weight gain exhibits a low rate for short and a high rate for long exposure times, implying that the 0.5-micron coating's protection decreases for long exposures at this temperature.
Document ID
19860028400
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Unnam, J.
(Analytical Services and Materials, Inc. Tabb, VA, United States)
Shenoy, R. N.
(Analytical Services and Materials, Inc. Tabb, VA, United States)
Wiedemann, K. E.
(Analytical Services and Materials, Inc. Tabb, VA, United States)
Clark, R. K.
(NASA Langley Research Center Hampton; Analytical Services and Materials, Inc., Tabb, VA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Metallic Materials
Accession Number
86A13138
Distribution Limits
Public
Copyright
Other

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