| Protective Effect of the Sputtered TiAlCrAg Coating on the High-Temperature Oxidation and Hot Corrosion Resistance of Ti-Al-Nb Alloy |
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| 作者姓名： | Yanjun XI Fuhui WANG and Lianlong HEState Key Laboratory for Corrosion & Protection Institute of Metai Research Chinese Academy of Sciences Shenyang ChinaShenyang National Laboratory for Materials Science Institute of Metai Research Chinese Academy of Sciences Shenyang China |
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| 作者单位： | Yanjun XI，Fuhui WANG and Lianlong HEState Key Laboratory for Corrosion & Protection，Institute of Metai Research，Chinese Academy of Sciences，Shenyang 110016，ChinaShenyang National Laboratory for Materials Science，Institute of Metai Research，Chinese Academy of Sciences，Shenyang 110016，China |
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| 摘 要： | The effect of a sputtered Ti-48AI-8Cr-2Ag (at. pct) coating on the oxidation resistance of the cast Ti-46.5AI-5Nb (at. pct) alloy was investigated in air at 1000-1100℃. Hot corrosion in molten 75 wt pct Na2SO4+25 wt pct K2SO4 was investigated at 900℃. The scale on the cast TiAINb tends to spall in air, while the scale on coating is very adherent. The sputtered Ti-48AI-8Cr-2Ag coating remarkably improved high temperature oxidation resistance of the cast Ti-46.5AI-5Nb alloy because of the formation of an adherent Al2O3 scale. Due to the inward diffusion of Cr, Kirkendall voids were found at the coating/substrate interface. TiAICrAg coating provided excellent hot corrosion resistance for TiAINb alloy in molten 75 wt pct Na2SO4+25 wt pct K2S04 at 900℃ due to the formation of a continuous Al2O3 scale.
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Protective Effect of the Sputtered TiAlCrAg Coating on the High-Temperature Oxidation and Hot Corrosion Resistance of Ti-Al-Nb Alloy |
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| Yanjun XI,Fuhui WANG and Lianlong HEState Key Laboratory for Corrosion & Protection,Institute of Metai Research,Chinese Academy of Sciences,Shenyang ,ChinaShenyang National Laboratory for Materials Science,Institute of Metai Research,Chinese Academy of Sciences,Shenyang ,China.Protective Effect of the Sputtered TiAlCrAg Coating on the High-Temperature Oxidation and Hot Corrosion Resistance of Ti-Al-Nb Alloy[J].Journal of Materials Science & Technology,2004,20(6):724-727. |
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| Authors: | Yanjun XI Fuhui WANG Lianlong HE |
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| Affiliation: | State Key Laboratory for Corrosion & Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The effect of a sputtered Ti-48Al-8Cr-2Ag (at. pct) coating on the oxidation resistance of the cast Ti-46.5Al-5Nb (at. pct) alloy was investigated in air at 1000～1100℃. Hot corrosion in molten 75 wt pct Na2SO4 25 wt pct K2SO4 was investigated at 900℃. The scale on the cast TiAlNb tends to spall in air, while the scale on coating is very adherent. The sputtered Ti-48Al-8Cr-2Ag coating remarkably improved high temperature oxidation resistance of the cast Ti-46.5Al-5Nb alloy because of the formation of an adherent Al2O3 scale. Due to the inward diffusion of Cr,Kirkendall voids were found at the coating/substrate interface. TiAlCrAg coating provided excellent hot corrosion resistance for TiAlNb alloy in molten 75 wt pct Na2SO4 25 wt pct K2SO4 at 900℃ due to the formation of a continuous Al2O3 scale. |
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| Keywords: | High temperature oxidation TiAlCrAg coating Hot-corrosion |
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