Theoretical calculations for the work of formation of two-dimensional nuclei, Wm,, of the h.c.p. lattice are presented. The dependence of Was on supersaturation is given graphically. The calculations have been proved in the case of cobalt electrodeposition. The polarization curves in the deposition
Preferred orientation of electrodeposited iron crystallites
โ Scribed by N.A. Pangarov; S.D. Vitkova
- Publisher
- Elsevier Science
- Year
- 1966
- Tongue
- English
- Weight
- 650 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0013-4686
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โฆ Synopsis
The work of formation of two-dimensional nuclei with a b.c.c. lattice is theoretically calculated, taking into consideration the forces of interaction of up to fourth neighbours. The work of formation is plotted as a function of supersaturation.
The orientation axes of iron electrodeposits have been studied experimentally at various overvoltage values. Orientations along the [310] axis were obtained for the first time. The effect of potassium iodide upon overvoltage and crystal orientation was also investigated. The experimental results are in agreement with the theory of preferred orientation of crystallites in electrodeposited metals, developed on the basis of calculations of the work necessary for the formation of two-dimensional nuclei at various supersaturations.
RCstm&-Calcul thborique, tenant compte jusqu'aux quatriemes voisins pour les forces d'interaction, du travail de formation de noyaux bidimensionnels 51 reseaux cubiques centres. C'est une fonction de la sursaturation.
L'orientation des axes du fer electrodepod a ete BtudiQ exp&imentalement a diverses surtensions. Des orientations le long des axes [310] ont et6 obtenues pour la premiere fois. L'on a aussi Btudie l'effet de KI sur la surtension et l'orientation cristalline. Les resultats exp&imentaux sont en accord avec la thtorie de l'orientation prtferentielle des cristallites dans les metaux Blectrodepods, les calculs &ant developpes sur la base du travail necessaire a la formation de noyaux bidimensionnels a diverses sursaturations. Zusammenfassung-Die Bildungsarbeit von zweidimensionalen Keimen des kubisch-raumzentrierten Gitters wurde mit Berticksichtigung der Wirkungskrlfte bis zu viertnachsten Nachbam theoretisch berechnet. Die Abhtigigkeit der Bildungsarbeit als Funktion der Ubersattigung wurde graphisch dargestellt. Die Orientiemngsachsen von Eisenniederschlagen sind experimentell bei verschiedenen Uberspanmmgswerten untersucht worden. Achse erhalten worden. Zum erstenmal sind Orientiemngen entsprechend der [310] Es wurde such der EintIuB von Kaliumiodid auf die Uberspammng und die Kristallorientierung untersucht. Die experimentellen Ergebnisse sind in Obereinstimmung mit der Theorie der bevotzugten Orientierung von Kristallen in elektrolytisch abgeschiedenen Metallen, die auf Grund der Berechnung der zur Bildung zweidimensionaler Keime bei verschiedenen Ubersiittigungen notwendigen Arbeit entwickelt wurde.
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