Composition, Morphology, and Topography of Galvanic Coatings Fe–Co–W and Fe–Co–Mo
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Дата
2017
ORCID
DOI
doi.org/10.1186/s11671-017-2128-3
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
Анотація
Ternary coatings Fe-Co-W with an iron content of 40–55 at.%, cobalt 39–44 at.%, and tungsten 4–12 at.% and Fe-Co-Mo with an iron content of 40–55 at.%, cobalt 39–44 at.%, and tungsten 4–12 at.% were obtained by galvanostatic and pulse electrolysis on the mild steel substrate from iron(III) citrate-based electrolyte. The influence of electrolysis mode and parameters on composition of deposited alloys was studied. The competing reduction of iron and tungsten in Fe-Co-W coatings as well as the competitive deposition of iron and cobalt in Fe-Co-Mo coatings at various current densities were defined. Simultaneously, the alloy enrichment with molybdenum is more marked at a pulse mode. Atomic force microscope analysis of the Fe-Co-W alloy coating morphology and surface topography indicates their globular structure with spherical grains in the range of 2.5–3.5 μm. The surface of Fe-Co-Mo is characterized by parts of a globular structure with an average conglomerate size of 0.3–0.5 μm and singly located cone-shaped hills with a base diameter of 3 μm. Sites with a developed surface were detected within the same scan area which topography is identical to the crystal lattice of cobalt with the crystalline conglomerate sizes in the range of 0.2–1.75 μm.
Опис
Ключові слова
AFM analysis, composition, electrolyte bath, Fe-Co-W (Mo) coating, pulse mode, topography
Бібліографічний опис
Composition, Morphology, and Topography of Galvanic Coatings Fe–Co–W and Fe–Co–Mo [Electronic resource] / I. Yu. Yermolenko [et al.] // Nanoscale Research Letters. – 2017. – Vol. 12. – 9 p. – URL: https://nanoscalereslett.springeropen.com/track/pdf/10.1186/s11671-017-2128-3.pdf, free (accessed 28.09.2021).