A Finite Difference Method for Determining Interdiffusivity of Aluminide Coating Formed on Superalloy  

作　　者：Hua WEI, Xiaofeng SUN, Qi ZHENG, Guichen HOU, Hengrong GUAN and Zhuangqi HUState Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 

出　　处：《Journal of Materials Science & Technology》2004年第5期595-598,共4页材料科学技术（英文版）

摘　　要：A numerical method has been developed to extract the composition-dependent interdiffusivity from the concentration profiles in the aluminide coating prepared by pack cementation. The procedure is based on the classic finite difference method (FDM). In order to simplify the model, effect of some alloying elements on interdiffusivity can be negligible. Calculated results indicate the interdiffusivity in aluminide coating strongly depends on the composition and give the formulas used to calculate interdiffusivity at 850, 950 and 1050癈. The effect on interdiffusivity is briefly discussed.A numerical method has been developed to extract the composition-dependent interdiffusivity from the concentration profiles in the aluminide coating prepared by pack cementation. The procedure is based on the classic finite difference method (FDM). In order to simplify the model, effect of some alloying elements on interdiffusivity can be negligible. Calculated results indicate the interdiffusivity in aluminide coating strongly depends on the composition and give the formulas used to calculate interdiffusivity at 850, 950 and 1050癈. The effect on interdiffusivity is briefly discussed.

关 键 词：Interdiffusivity Aluminide coating Finite difference method (FDM) 

分 类 号：TG135[一般工业技术—材料科学与工程]