Investigation of the oxide adhesion and growth characteristics on platinum-modified aluminide coatings. Master's thesis

Technical Report · Mon Sep 01 00:00:00 EDT 1986

OSTI ID:6875206

Farrell, M S

The operating environment for superalloy blades and vanes in gas turbine engines has necessitated the developed of alloy coatings to achieve satisfactory resistance of the metal to oxidation and hot corrosion. Aluminide coatings were initially developed to meet this need. Recently it was shown that platinum additions significantly improve the oxidation resistance of these aluminide coatings. The effects of pre-aluminizing surface smoothness and coating structure for both platinum modified and unmodified aluminide coatings on IN-738 in a cyclic oxidation environment at 1100 C were examined. Weight change measurements were used to determine the coating oxide scale adherence characteristics and to quantify the cyclic oxidation behavior of the various coating structures.

• Research Organization: Naval Postgraduate School, Monterey, CA (USA)
• OSTI ID: 6875206
• Report Number(s): AD-A-175305/2/XAB
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
PLATINUM ADDITIONS
GAS TURBINE ENGINES
HEAT RESISTING ALLOYS
COATINGS
CORROSION
CORROSION RESISTANCE
DIFFUSION COATINGS
ENGINES
OXIDATION
OXIDES
TURBINE BLADES
VERY HIGH TEMPERATURE
WEIGHT
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
HEAT ENGINES
HEAT RESISTANT MATERIALS
INTERNAL COMBUSTION ENGINES
MATERIALS
OXYGEN COMPOUNDS
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
330103* - Internal Combustion Engines- Turbine
360105 - Metals & Alloys- Corrosion & Erosion