HIGH STRENGTH REFRACTORY ALLOYS

HIGH STRENGTH REFRACTORY ALLOYS

The report summarizes the testing of columbium with a zinc coating and columbium plus 2% zirconium with a zinc coating. Both materials were exposed to high temperature exhaust gases supplied from the combustion of various fuels (hydrogen, propane, and JP-4). The maximum temperature to which the zinc...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: Fiorello, S C
Format: Report
Sprache:eng
Schlagworte:
CORROSION
CORROSIVE GASES
EXHAUST GASES
GAS TURBINES
HEAT RESISTANT ALLOYS
METAL COATINGS
Metallurgy and Metallography
NIOBIUM
NIOBIUM ALLOYS
NUCLEAR PROPULSION
OXIDATION
REFRACTORY MATERIALS
ZIRCONIUM ALLOYS
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Beschreibung
Zusammenfassung:The report summarizes the testing of columbium with a zinc coating and columbium plus 2% zirconium with a zinc coating. Both materials were exposed to high temperature exhaust gases supplied from the combustion of various fuels (hydrogen, propane, and JP-4). The maximum temperature to which the zinc coated materials appeared to perform satisfactorily was: (1) less than 1800 degrees F when exposed to the exhaust gas products of hydrogen, and (2) in the region of 2000 to 2200 degrees F when exposed to the exhaust gas products of propane and JP-4 fuels. No advantage would be realized by the use of the materials tested in the turbine section of air breathing gas turbine engines, since the current turbine inlet hot spot temperatures are in the same range as the maximum useful temperature determined for these materials.