IMPROVEMENT OF OXIDATION RESISTANCE OF Ti47Al1Cr2Nb BY APPLYING MnCl2 ON ALLOY SURFACE

J Chin Soc Corr Pro

1999, Vol. 19

Issue (5): 311-314 DOI:

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IMPROVEMENT OF OXIDATION RESISTANCE OF Ti47Al1Cr2Nb BY APPLYING MnCl2 ON ALLOY SURFACE

Li Xin;;;

中国科学院金属研究所

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Abstract The effect of MnCl2 applied on surface of Ti47Al2Cr2Nb quaternary alloy on its isothermal oxidation behavior at 900℃ has been studied.The presence of MnCl2 reduced the oxidation rate of the alloy by a factor of 3,and changed the scale composition from a mixture of TiO2 and Al2O3 to basically pure Al2O3.The reason for the improvement of oxidation resistance of the alloy due to MnCl2 was discussed.At the beginning of oxidation titanium in the alloy reacted with Cl to form substable titanium chloride.which vaporized and left alloy surface.As a result,a layer of compact Al2O3 scale formed on the alloy asuface and prevented the outward diffudion of titanium.

Key words: TiAl-base alloy surface applied MnCl2 oxidation

Received: 18 November 1998

Corresponding Authors: Li Xin

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Li Xin. IMPROVEMENT OF OXIDATION RESISTANCE OF Ti47Al1Cr2Nb BY APPLYING MnCl2 ON ALLOY SURFACE. J Chin Soc Corr Pro, 1999, 19(5): 311-314 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I5/311

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