K465高温合金铝化物层Ni/Al互扩散系数计算

中国腐蚀与防护学报

2004, Vol. 24

Issue (5): 257-261

研究报告

本期目录 | 过刊浏览

K465高温合金铝化物层Ni/Al互扩散系数计算

韦华;管恒荣;孙晓峰;郑启;侯桂臣;胡壮麒

中科院金属所

Calculation of Interdiffusivity of Ni and Al in Aluminide Coating Formed on K465 Superalloy

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中科院金属所

全文: PDF(151 KB)

摘要: 根据铝化物涂层形成过程中Al原子浓度分布，采用有限差分法反求铝化物外层Ni/Al互扩散系数。结果表明：相同温度下，铝化物外层Ni/Al互扩散系数随Al原子浓度增加而增大，表现出与Al浓度相关性；合金表面渗铝外层Ni/Al互扩散系数明显小于纯Ni表面渗铝外层Ni/Al互扩散系数。

关键词 ：铝化物涂层, 互扩散系数, 有限差分法

Abstract：A numerical method has been developed to extract the composition-dependent interdiffusivity of Ni and Al from the concentration profiles in the aluminide coatings prepared by pack cementation. The procedure is based on the classic finite difference method(FDM). In order to simplify the model, the effect of some alloying elements and carbides on interdiffusivity was negligible. Calculated results indicated that interdiffusivities of Ni and Al in aluminide coating on K465 superalloy strongly depended on the composition and were evidently less than those on pure nickel substrate. The reasons for decreasing of interdiffusivities in aluminide coatings on K465 superalloy were briefly discussed.

Key words： aluminide coating interdiffusivity finite difference method(FDM)

收稿日期: 2003-05-06

ZTFLH:

TG174

通讯作者: 韦华

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引用本文:

韦华; 管恒荣; 孙晓峰; 郑启; 侯桂臣; 胡壮麒 . K465高温合金铝化物层Ni/Al互扩散系数计算[J]. 中国腐蚀与防护学报, 2004, 24(5): 257-261 .
. Calculation of Interdiffusivity of Ni and Al in Aluminide Coating Formed on K465 Superalloy. J Chin Soc Corr Pro, 2004, 24(5): 257-261 .

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2004/V24/I5/257

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