EFFECT OF NANOCRYSTALLIZATION ON THE SCALING OF NiAl AT 1000℃ IN AIR

Abstract

Abstract: The oxidation behavior of a magnetron sputtered nanocrystalline NiAl coating wasinvestigated at 1000℃ in air. Comparing with cast NiAl and NiAl-0.1at.%Y alloysreveals influences of nanocrystallization as well as yttrium addition on the oxidationbehavior of NiAl. Results show that a phase transformation from metastable θ-Al2O3to stable α-Al2O3 occurred in scales, which was accelerated by the microcrystallizationand retarded by the addition of Y. The addition of Y as well as the nanocrystallizationreduced the void formation at the interface between the scale and the substrate.

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S.L.Yang, Fuhui Wang, S.L.Zhu. EFFECT OF NANOCRYSTALLIZATION ON THE SCALING OF NiAl AT 1000℃ IN AIR[J]. Acta Metallurgica Sinica (English Letters), 2002, 15(1): 77-80 .

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EFFECT OF NANOCRYSTALLIZATION ON THE SCALING OF NiAl AT 1000℃ IN AIR

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