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The crystal orientation of electrodeposited metals

✍ Scribed by N.A. Pangarov


Publisher
Elsevier Science
Year
1962
Tongue
English
Weight
511 KB
Volume
7
Category
Article
ISSN
0013-4686

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✦ Synopsis


Calculations have been made for the work of formation of the two-dimensional nucleus of the metals crystallizing in cubic face-centred and cubic body-centred lattices. It is shown that the crystal orientation of thick deposits depends upon this work. The crystallites of electrodedeposited metal have preferred orientation, when the work of formation of the two-dimensional nucleus for some net plane is smaller than that for the other net planes. It is shown that the crystal orientation depends on the supersaturation, i.e. the overvoltage during the deposition of the metal ions. The results obtained are in very good agreement with the experimental data. Znsammenfassung-Berechnungen sind angestellt worden fur die Bildungsarbeit zweidemensionaler Keime von Metallen, die in kubisch-fl%chenzentrierten und kubisch-raumzentrierten Gittern kristallisieren. Es wird gezeigt, dass die Orientierung der Kristallite dicker Niederschllge von dieser Arbeit abhangig ist. Die Kristallite elektrolytisch abgeschiedener Metalle haben eine bevorzugte Orientierung, wenn die Bildungsarbeit eines zweidimensionalen Keimes einer Netzebene kleiner als diejenige fur die anderen Netzebenen ist. Es wird gezeigt, dass die Orientierung der Kristallite von der Ubersattigung, d.h. von der Uberspannung wlhrend der Abscheidung der Metallionen, ;abhlngig ist. Die erhaltenen Resultate sind in volliger Ubereinstimmung mit den Versuchsergebnissen. R&rne-Evaluation du travail de formation d'un germe bi-dimensionnel de metal cubique a face centrde ou cubique centrb. 11 est montre que l'oriemation cristalline d'electro depositions epaisses depend de ce travail. Les cristallites affectent une orientation privilegiee quand ce travail est nettement inferieur pour un certain plan que pour tout autre plan cristallographique.

L'orientation cristalline depend aussi de la sursaturation, c'est a dire de la surtension propre a 1'6lectrodeposition. Des resultats experimentaux confirment ces previsions theoriques.


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