C‐Type Relationship between Critical Time and Evaporation Parameter for Surface Segregation in the Case of Evaporation

The relationship between the critical time and evaporation parameter is discussed in terms of the kinetic model for surface segregation in the case of evaporation. An interesting phenomenon is observed that the variation of critical time obeys a C‐type law in kinetic curves with different evaporatio...

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Bibliographic Details
Published in:Advanced engineering materials 2020-05, Vol.22 (5), p.n/a
Main Authors: Zheng, Lei, Wang, Bo, Meng, Fangliang, Meng, Ye, Cui, Fenge, Yun, Bing
Format: Article
Language:English
Subjects:
critical times
diffusion
evaporation
segregation
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Summary:The relationship between the critical time and evaporation parameter is discussed in terms of the kinetic model for surface segregation in the case of evaporation. An interesting phenomenon is observed that the variation of critical time obeys a C‐type law in kinetic curves with different evaporation parameters. The C‐type law of critical time is found to be caused by that of maximum evaporation flux. The existence of C‐type law is proved by the fitted kinetics curve of the Mg surface segregation of Al–0.8 wt% Mg alloy, which confirms the model of surface segregation in the case of evaporation to be reliable. Herein, an interesting phenomenon where the variation of critical time obeys a C‐type law in kinetic curves with different evaporation parameters is explained. The observed C‐type law of critical time and the subsequent experimental fitting confirm the model of surface segregation in the case of evaporation to be reliable for another time.
ISSN:1438-1656
1527-2648
DOI:10.1002/adem.202000114