Influence of oxide reinforcement materials on high-temperatue oxidation resistance of Ni sub 3 A1 matrix composites

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:6522288

Tortorelli, P F; DeVan, J H; McKamey, C G; Howell, M

The oxidation resistance of Ni{sub 3}Al-based metal matrix composites was studied in high-temperature air under isothermal and thermal cycling conditions as a function of the composition and form of oxide reinforcement material. The incorporation of oxide fibers Al{sub 2}O{sub 3}, HfO{sub 2}, or Al{sub 2}O{sub 3}--ZrO{sub 2} or particles into the Ni{sub 3}Al matrix led to oxidation rates significantly greater than that for the monolithic aluminide. The increase in susceptibility was primarily due to internal oxidation along the fiber- (or particle-) matrix interfaces and depended on the type of reinforcement material and its deposition in the matrix. The results suggest that the choice of reinforcement material and the method of materials processing will be important considerations in the design of oxidation-resistant Ni{sub 3}Al composites. 10 refs, 4 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6522288
• Report Number(s): CONF-9011122-1; ON: DE91001625
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
360604 -- Materials-- Corrosion
Erosion
& Degradation
ALLOYS
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CORROSION RESISTANCE
ELEMENTS
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
MATERIALS
METALS
NICKEL ALLOYS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
REINFORCED MATERIALS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES