Chemical state of phosphorus in amorphous Ni–Fe–P electroplates
作者： Victor A. Safonov , Olga V. Safonova , Larisa A. Fishgoit , Kristina Kvashnina , Pieter Glatzel
DOI: 10.1016/J.SURFCOAT.2015.05.013
关键词: Inorganic chemistry 、 Amorphous solid 、 Crystallization 、 Phosphorus 、 Nanocrystalline material 、 Thermal treatment 、 Nickel 、 Materials science 、 Chemical state 、 Copper
摘要: Abstract High-quality Fe–Ni–P coatings on copper plates were prepared by electrodeposition from solutions containing simultaneously Ni(II) and Fe(II) cations hypophosphite-anions. The structure of deposits was compared to Fe–P Ni–P under similar conditions. All as-prepared showed amorphous or very fine nanocrystalline as no Bragg peaks any crystalline phase detected. Quantitative analysis valence-to-core X-ray emission (vtc-XES) spectra that majority phosphorus atoms are chemically bonded the iron nickel. These results prove formed during does not contain a significant amount elemental (or so-called “free” “intermediate”) phosphorus. Thermal treatment in vacuum (as well Ni–P) resulted their complete crystallization. Comparison vtc-XES original thermally treated samples allows one conclude concentration metals increases only slightly (by 1–2 at.%) further confirming low absence) structure.
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