1974-02-01

An Evaluation of Alloys and Coatings for Use in Automobile Thermal Reactors 740091

Several candidate alloys and coatings were evaluated for use in automobile thermal reactors. Full-size reactors of the candidate materials were analyzed in cyclic engine dynamometer tests with peak temperature of 1900°F (1040°C). Two developmental ferritic iron alloys-GE1541 and NASA-18T-exhibited the best overall performance lasting at least 60% of the life of the test engine. Four of the alloys evaluated warrant consideration for reactor use. They include GE1541, Armco 18 SR, NASA-18T, and Inconel 601. None of the commercial coating substrate combinations evaluated warrant consideration for reactor use.

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