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가스터빈 엔진부품용 NiCoCrAlY-(Ta, Re, Ir) 코팅의 고온산화특성

High Temperature Oxidation of NiCoCrAlY-(Ta, Re, Ir) Coatings for Gas Turbines

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주제분류기계공학

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Abstract

The high velocity oxy-fuel sprayed coatings of 38Ni-23Co-20Cr-11Al-3Y-5Ta, 25Ni-34Co-20Cr-11Al-3Y-2Re and 32Ni-34.5Co-22Cr-11Al-0.5Ir (in wt%) were oxidized at 1000 and 1100oC in air in order to find the alloying effect of Ta, Re and Ir on the oxidation properties of the NiCoCrAlY-base coatings. The primary phase of the coatings was Ni3Al. The oxides formed on the coatings consisted primarily of a-Al2O3, together with some CoCr2O4, CoAl2O4, and Al5Y3O12. Tantalum oxidized to Ta2O5 and Ta2O2.2. However, no oxides of Re and Ir were detected by XRD owing to their thermodynamic inertness and/or their small amount.

참고문헌 (2)

  1. "Sci Eng", A357 (2003)
  2. "High-Temperature Protection of Metals 5", pp.607~ (2001), Trans Tech Publication Uetikon-Zurich

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