Properties of Electrodeposited Cobalt-Nickel-Molybdenum Alloys
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- Category: Molybdenum knowledge
- Published on 09 July 2013
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Soft-magnetic ternary cobalt-nickel-molybdenum films were electrodeposited from a sulphate-citrate bath at pH 4.0 at a constant deposition rate of 2.5 mum h(-1).
Both nickel and molybdenum incorporations in the ternary alloy were restrained in order to achieve low c%oercivity and maximum saturation magnetisation.
11-15 wt%Ni and 7-13 wt%Mo were considered the most appropriate percentage ranges for actuation applications in MEMS of the coatings. Deposits were silvery bright and showed low roughness.
A nanometric grain size of similar to8 nm was deduced from the X-ray diffractograms. A comparative corrosion study of Co, Co-Mo, Co-Ni and Co-Ni-Mo films was also carried out.
Corrosion data demonstrated that small amounts of nickel in the deposits did not cause an E-corr shift towards more positive values but decreased the corrosion rate. (C) 2005 Elsevier B.V. All rights reserved.
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