Izvorni znanstveni članak
https://doi.org/10.5599/jese.480
In-depth component distribution in electrodeposited alloys and multilayers
László Péter
orcid.org/0000-0001-5604-0982
; Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Kálmán Vad
; Institute of Nuclear Research of the Hungarian Academy of Sciences, Bem tér 18/c, 4026 Debrecen, Hungar
Attila Csik
; Institute of Nuclear Research of the Hungarian Academy of Sciences, Bem tér 18/c, 4026 Debrecen, Hungar
Rocio Muñíz
Lara Lobo
; Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
Rosario Pereiro
; Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
Sašo Šturm
; Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
Kristina Žužek Rožman
; Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
György Molnár
; Institute of Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Katalin Németh
; Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Katalin Neuróhr
; Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Krisztina Boros
; Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Lajos Pogány
; Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Imre Bakonyi
; Wigner Research Centre for Physics, Hungarian Academy of Sciences, Konkoly-Thege út 29-33, 1121 Budapest, Hungary
Sažetak
It is shown in this overview that modern composition depth profiling methods like secondary neutral mass spectroscopy (SNMS) and glow-discharge – time-of-flight mass spectrometry (GD-ToFMS) can be used to gain highly specific composition depth profile information on electrodeposited alloys. In some cases, cross-sectional transmission electron microscopy was also used for gaining complementary information; nevertheless, the basic component distribution derived with each method exhibited the same basic features. When applying the reverse sputtering direction to SNMS analysis, the near-substrate composition evolution can be revealed with unprecedented precision. Results are presented for several specific cases of electrodeposited alloys and mulitlayers. It is shown that upon d.c. plating from an unstirred solution, the preferentially deposited metal accumulates in the near-substrate zone, and the steady-state alloy composition sets in at about 150-200 nm deposit thickness only. If there is more than one preferentially deposited metal in the alloy, the accumulation zones of these metals occur in the order of the deposition preference. This accumulation zone can be eliminated by well-controlled hydrodynamic conditions (like the application of rotating disc electrodes) or by pulse plating where the systematic decrease in the duty cycle provides a gradual transition from a graded to a uniform composition depth profile. The application of composition depth profile measurements enabled detecting the coincidence in the occurrence of some components in the deposits down to the impurity level. This was exemplified by the GD-ToFMS measurements of Ni-Cu/Cu multilayers where all detected impurities accumulated in the Cu layer. The wealth of information obtained by these methods provides a much more detailed picture than the results normally obtained with bulk analysis through conventional integral depth profiling and help in the elucidation of the side reactions taking place during the plating processes.
Ključne riječi
Alloy formation; near-substrate composition modulation; hydrodynamic conditions; component distribution correlations
Hrčak ID:
194868
URI
Datum izdavanja:
3.3.2018.
Posjeta: 903 *