Comparative thermal stability characteristics and isothermal oxidation behavior of an aluminized and a Pt-aluminized Ni-base superalloy

Journal Article · Wed Nov 01 00:00:00 EST 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00388-C· OSTI ID:116071

Tawancy, H M; Sridhar, N; Abbas, N M ^[1]; Rickerby, D ^[2]

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1. King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia)
2. Rolls-Royce plc, Derby (United Kingdom)

It is the objective of this paper to compare the thermal stability characteristics and isothermal oxidation behavior of an aluminide coating and a Pt-aluminide coating of the same Al content on a Ni-base superalloy. Addition of Pt to an aluminide coating was found to improve its thermal stability as well as its capability for selective oxidation of Al resulting in a purer scale of slower growth rate. This was correlated with the greater diffusional stability of the Pt-aluminide coating restricting the transport of substrate elements into the outer coating layers.

• OSTI ID: 116071
• Journal Information: Scripta Metallurgica et Materialia, Vol. 33, Issue 9; Other Information: PBD: 1 Nov 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
33 ADVANCED PROPULSION SYSTEMS
NICKEL BASE ALLOYS
OXIDATION
ALUMINIUM ALLOYS
SURFACE COATING
PLATINUM
GAS TURBINES
MATERIALS
SAMPLE PREPARATION
SCALING
DIFFUSION
HEAT TREATMENTS
AGING
STABILITY