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    YANG Shi-wei, XIA De-gui, SUN Jie, ZHANG Zhi-ming, YANG Xiao. Element Diffusion of Al-Si Coating on Superalloy DZ4 at 1100℃[J]. Materials and Mechanical Engineering, 2008, 32(3): 5-7.
    Citation: YANG Shi-wei, XIA De-gui, SUN Jie, ZHANG Zhi-ming, YANG Xiao. Element Diffusion of Al-Si Coating on Superalloy DZ4 at 1100℃[J]. Materials and Mechanical Engineering, 2008, 32(3): 5-7.
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    Element Diffusion of Al-Si Coating on Superalloy DZ4 at 1100℃

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    • Received Date: June 29, 2007
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    • The Al-Si coating on DZ4 superalloy was prepared by slurry process.High temperature oxidation experiments of Al-Si coating on DZ4 were carried out at 1 100℃ in air and element diffusion in the oxidation was analyzed.The results indicate that Al-Si coating is composed of two layers.The outer layer is a single phase β-NiAl,while inner layer consiste of β-NiAl and carbide precipitates.The combination of inward-diffusing of Si and outward-diffusing of elements (mainly Mo and W) leds to the formation of Si-riched M6C.Si-riched M6C layer prohibited Ni/Al inter-diffusion and promoted the coating resistance to high temperature oxidation.
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