Published April 1980 | Version v1
Report Restricted

Al2O3 adherence on CoCrAl alloys

Creators

Description

Adherence of protective oxides on NiCrAl and CoCrAl superalloys has been promoted by a dispersion of a highly oxygen reactive element or its oxide being produced within the protection system. Two aspects of this subject are investigated here: the use of Al2O3 as both the dispersion and protective oxide; and the production of an HfO2 dispersion while simultaneously aluminizing the alloy. It was found that an Al2O3 dispersion will act to promote the adherence of an external scale of Al2O3 to a degree comparable to previously tested dispersions and an HfO2 dispersion comparable to that produced by a Rhines pack treatment is produced during aluminization

Availability note (English)

MF available from INIS under the Report Number; Available from NTIS., PC A06/MF A01.

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Additional details

Publishing Information

Imprint Pagination
110 p.
Report number
LBL--10952

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
11569353
Subject category
S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ADHESION; ALUMINIUM ALLOYS; ALUMINIUM OXIDES; CHROMIUM ALLOYS; CREEP; FATIGUE; GAS TURBINES; HAFNIUM OXIDES; NICKEL BASE ALLOYS; OXIDATION; PROTECTIVE COATINGS; SURFACE COATING; SURFACE PROPERTIES
Descriptors DEC
ALLOYS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COATINGS; DEPOSITION; HAFNIUM COMPOUNDS; MECHANICAL PROPERTIES; NICKEL ALLOYS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENT ALLOYS; TRANSITION ELEMENT COMPOUNDS; TURBINES