Articles written in Bulletin of Materials Science
Volume 35 Issue 2 April 2012 pp 183-189
Fe–Ni films were electrodeposited on ITO glass substrates from the electrolytes with different molar ratio of Ni2+/Fe2+ and different pH values (2.1, 2.9, 3.7 and 4.3) at 25°C. The properties of Fe–Ni alloy films depend on both Ni2+ and Fe2+ concentrations in electrolyte and pH values. The content of Ni increases from 38% to 84% as the mole ratio of NiSO4/FeSO4 increasing from 0.50/0.50 to 0.90/0.10 in electrolyte and slightly decreases from 65% to 42% as the pH values increase from 2.1 to 4.3. The X-ray diffraction analysis reveals that the structures of the films strongly depend on the Ni content in the binary films. The magnetic performance of the films shows that the saturation magnetization (𝑀s) decreases from 1775.01 emu/cm3 to 1501.46 emu/cm3 with the pH value increasing from 2.1 to 4.3 and the saturation magnetization (𝑀s) and coercivity (𝐻c) move up from 1150.44 emu/cm3 and 58.86 Oe to 2498.88 emu/cm3 and 93.12 Oe with the increase of Ni2+ concentration in the electrolyte, respectively.
Volume 35 Issue 7 December 2012 pp 1093-1097
A layer of Co–Zn–P alloys was coated on short carbon fibre (CFs) surfaces using electroless plating method. The influence of the concentration of Co2+ and Zn2+ and reaction time on the plating rate were measured by comparing the relative mass gain rate of Co–Zn–P-coated fibres with uncoated carbon fibres prepared under different conditions. The materials characterizations were analysed by field emission scanning electron microscopy, X-ray diffraction and energy dispersive spectroscope. The magnetic properties of Co–Zn–P/CFs composites prepared in different Zn2+ concentration baths were measured by the vibrating sample magnetometer. The best processing parameters of electroless plating of Co–Zn–P coating on short carbon fibres were obtained.
Volume 38 Issue 7 December 2015 pp 1673-1678
Ni–Fe alloy coatings were successfully prepared on carbon fibre (CF) surfaces bymeans of electroplating at 25°C for 560 s. The structures and morphologies of the composite were characterized using X-ray diffraction and scanning electron microscopy. The coercivity (𝐻𝑐) and saturation magnetization (𝐻𝑠) of the Fe0.45Ni0.55/CF composites were 45.19 Oe and 1513.59 emu g−1, respectively. The reflectivity of Fe0.45Ni0.55/CF composites was less than −5 dB over the range of 1.1–5.4 GHz. The reflectivity of Fe0.45Ni0.55/CF composites was less than −10 dB over the range of 1.6–2.1 GHz. The lowest reflectivity of the Fe0.45Ni0.55/CF composites was −14.7 dB at 2.0 GHz and the corresponding thickness was 3.3 mm.
Volume 42 | Issue 6
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