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

材料科学技术（英文）, 2011, 27(9): 841-845.

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

^1, , ^2, , ^3, , ^4,

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

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

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

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

关键词：高温氧化行为 , Al合金 , 高温抗氧化性能 , Cr2O3 , 镍铬 , 动力学测定 , X射线衍射 , Al2O3

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

Keywords： Oxidation kinetics , Oxide scale , High-temperature oxidation resistance ,

A study was conducted to examine the isothermal oxidation behavior of a new Ni-Cr-W-AI alloy in air at 1250℃ 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.

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

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

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