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Multiple Twinning and Stacking Faults in Silver Dendrites

Authorized Users Only
2016
Authors
Radmilović, Vuk V.
Kacher, Josh
Ivanović, Evica
Minor, Andrew M.
Radmilović, Velimir R.
Article (Published version)
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Abstract
Detailed defect structure of dendrite formation was studied in order to connect the mesoscopic with the atomistic structure. It was demonstrated that twinning and stacking fault formation play a central role in the growth of electrodeposited Ag dendrites. The broad faces of Ag dendrites and the main trunk growth direction were found to be ((1) over bar 11) and [(1) over bar1 (2) over bar], respectively. Dendrite branches also formed and grew from the main trunk parallel to the [12 (1) over bar] and [(211) over bar] crystallographic directions. Twins and stacking faults were found to reside on the {111} crystallographic planes, as expected for a face centered cubic (FCC) Ag crystal. Using electron back scattered diffraction (EBSD) we found two variants of in-plane 60 degrees rotational twin domains in the ((1) over bar 11) broad dendrite surface plane. The intersections of twins and stacking faults with dendrite arm surfaces are perpendicular to the (112) arm growth directions. However,... occasionally twins on the {111} planes parallel to the (112) arm growth directions were also observed. Although defect assisted dendrite growth is facilitated by twinning and stacking fault formation on {111} planes, the growth directions of the trunk and branches are not of the (111) type, but rather close to (112). The (112) growth directions are maintained by breaking dendrite facets into thermodynamically stable 111 and 200 steps and structural ledges of different length.

Source:
Crystal Growth & Design, 2016, 16, 1, 467-474
Publisher:
  • Amer Chemical Soc, Washington
Funding / projects:
  • Serbian Academy of Sciences and Arts [F-141]
  • Office of Science, Office of Basic Energy Sciences, of the U.S. Department of EnergyUnited States Department of Energy (DOE) [DE-AC02-05CH11231]
  • Synthesis, processing and applications of nanostructured multifunctional materials with defined properties (RS-45019)
  • Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis (RS-172054)

DOI: 10.1021/acs.cgd.5b01459

ISSN: 1528-7483

WoS: 000367963400052

Scopus: 2-s2.0-84954040144
[ Google Scholar ]
URI
http://aspace.agrif.bg.ac.rs/handle/123456789/4146
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  • Radovi istraživača / Researchers’ publications
Institution/Community
Poljoprivredni fakultet

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