Oxidation resistance of sputtered Ni{sub 3}(AlCr) nanocrystalline coating

Journal Article · Tue Apr 01 00:00:00 EST 1997 · Oxidation of Metals

DOI:https://doi.org/10.1007/BF01668513· OSTI ID:518357

Wang, Fuhui ^[1]

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1. Inst. of Corrosion and Protection of Metals, Shenyang (China)

Isothermal and cyclic oxidation resistance at 1000{degrees}C in air were investigated for a cast Cr-containing Ni{sub 3}Al-base alloy and its sputtered nanocrystalline coating. The results indicated that both the cast Ni{sub 3}Al alloy and its sputtered coating exhibit excellent isothermal oxidation resistance as a result of the formation of Al{sub 2}O{sub 3} scales. However, the cast alloy possesses very poor cyclic oxidation resistance because of the spallation of the initially formed Al{sub 2}O{sub 3} scale during cooling and subsequent formation of NiO. On the contrary, the sputtered Ni{sub 3}(AlCr) nanocrystalline coating exhibits very good cyclic oxidation resistance due to the significant improvement of the adhesion of Al{sub 2}O{sub 3}.

• Sponsoring Organization: USDOE
• OSTI ID: 518357
• Journal Information: Oxidation of Metals, Vol. 47, Issue 3-4; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL BASE ALLOYS
CORROSION RESISTANCE
THERMAL CYCLING
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
SCALING
ADHESION
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K