EFFECT OF Ce MODIFICATION ON Cu DIFFUSION COEFFICIENT IN DIFFUSION SYSTEM OF ALLOY 2090-Al

Acta Metall Sin

1993, Vol. 29

Issue (10): 57-61 DOI:

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EFFECT OF Ce MODIFICATION ON Cu DIFFUSION COEFFICIENT IN DIFFUSION SYSTEM OF ALLOY 2090-Al

MENG Liang;ZHANG Baochang Northwestern Polytechnical University; Xi'an

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MENG Liang;ZHANG Baochang Northwestern Polytechnical University; Xi'an. EFFECT OF Ce MODIFICATION ON Cu DIFFUSION COEFFICIENT IN DIFFUSION SYSTEM OF ALLOY 2090-Al. Acta Metall Sin, 1993, 29(10): 57-61.

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Abstract The concentration distribution curves for Cu in the diffusion couples of Cemodified 2090 alloy with pure Al under different diffusing conditions have been measured.The Cu diffusion coefficients have been calculated by Boltzman-Matano method. The resultsindicate that adding minor Ce in the alloy may reduce the Cu diffusion coefficients. The Cudiffusion coefficients relates to its concentration distributions and gradients in the diffusioncouples. In general terms, the effect of adding 0.40% Ce on the Cu diffusion rate is generallysimilar to that of adding 0.23% Ce in the alloy.

Key words: diffusion Al-Li alloy Ce Cu

Received: 18 October 1993

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