HIGH TEMPERATURE OXIDATION OF DZ40M ALLOY

J Chin Soc Corr Pro

1999, Vol. 19

Issue (6): 339-344 DOI:

Research Report

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HIGH TEMPERATURE OXIDATION OF DZ40M ALLOY

Peisheng Liu;;

清华大学材料科学与工程系

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Abstract The oxidation kinetics of Co-based superalloy DZ40M in air at 900-1100℃ has been determined,and the oxide compositions at different exposure temperatures for various times have been examined by XRD.The kinetics indicated that this alloy followed the parabolic law at 900 and 1000℃ during isothermal oxidation,and followed the nearly linear law at 1050 and 1100℃ due to serious cracking and spalling-off of the oxide scales.The kinetic behavior of the alloy at all exposure tempweatures was affected greatly by the configuration of Cr2O3 in outer oxide scale.The formation mechanism of oxide scale at 900and 1000℃ deffered from that at 1050 and 1100℃,with the former having a continuous Cr2O3 layer.

Key words: Co-based superalloy DZ40M alloy High temperature oxidation

Received: 24 June 1998

Corresponding Authors: Peisheng Liu

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Peisheng Liu. HIGH TEMPERATURE OXIDATION OF DZ40M ALLOY. J Chin Soc Corr Pro, 1999, 19(6): 339-344 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I6/339

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