High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (9): 841-845.

• High Temperature Structural Materials • Previous Articles Next Articles

High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy

Y.C. Ma, X.J. Zhao, M. Gao, K. Liu

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2010-11-29 Revised:2011-03-07 Online:2011-09-28 Published:2011-09-28
Contact: Yingche Ma

Abstract

Abstract: A study was conducted to examine the isothermal oxidation behavior of a new Ni-Cr-W-Al alloy in air at 1250°C with different time. Oxidation kinetics was determined from weight-change measurements. The microstructure and composition of the oxide scale were investigated by means of scanning electron microcopy and X-ray diffraction. The results showed that the oxide scales of the alloy were a compact and continuous outer Cr₂O₃ and NiCr₂O₄ layer and an inner Al₂O₃ layer that was in dendrite shape. Oxides scales with good adherence were formed on the surface of the alloy, which made the alloy perform excellent high-temperature oxidation resistance.

Key words: Oxidation kinetics, Oxide scale, High-temperature oxidation resistance

Y.C. Ma, X.J. Zhao, M. Gao, K. Liu. High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy[J]. J Mater Sci Technol, 2011, 27(9): 841-845.

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High-Temperature Oxidation Behavior of a Ni-Cr-W-Al Alloy

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