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Chemical state of phosphorus in amorphous Ni–Fe–P electroplatesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 10 октября 2015 г.
- Авторы: Safonov Victor A., Safonova Olga V., Fishgoit Larisa A., Kristina Kvashnina, Pieter Glatzel
- Журнал: Surface and Coatings Technology
- Том: 275
- Год издания: 2015
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 239
- Последняя страница: 244
- DOI: 10.1016/j.surfcoat.2015.05.013
- Аннотация: High-quality Fe–Ni–P coatings on copper plates were prepared by electrodeposition from solutions containing simultaneously Ni(II) and Fe(II) cations and hypophosphite-anions. The structure of Fe–Ni–P deposits was compared to Fe–P andNi–P coatings prepared under similar conditions. All as-prepared deposits showed amorphous or very fine nanocrystalline structure as no Bragg peaks of any crystalline phasewere detected. Quantitative analysis of valence-to-core X-ray emission (vtc-XES) spectra of amorphous coatings showed that majority of phosphorus atoms are chemically bonded to the atoms of iron and nickel. These results prove that the structure of amorphous coatings formed during electrodeposition does not contain a significant amount of elemental (or so-called “free” or “intermediate”) phosphorus. Thermal treatment in vacuum of Fe–Ni–P coatings (as well as Fe–P and Ni–P) resulted in their complete crystallization. Comparison of vtc-XES spectra of original and thermally treated samples allows one to conclude that the concentration of phosphorus chemically bonded to metals increases only slightly (by 1–2 at.%) further confirming very lowconcentration (or the absence) of elemental phosphorus in the original structure.
- Добавил в систему: Сафонов Виктор Алексеевич