Metastable phases in the Ni75Nb12B13 alloy prepared under nonequilibrium conditions

Кубалова, Л. М.; Fadeeva, V.I.; Sviridov, I. A.

doi:10.1134/s0020168507110076

Cited by 2 publications

(1 citation statement)

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“…There are several reports on the violation of the above rules when forming metal alloys under nonequilibrium conditions. 37,38 Increasing the B content up to 6 at% in the coatings does not leads to a change of the lattice parameter a, although the deficiency of the crystal lattice enhances. The anodic polarization curves of the Ni-Co( 30) samples show two distinct potential ranges: the first range from the OCP (-0.06 V) to ca.…”

Section: Electrochemical Deposition Of Ni-co-b Alloy Coatings-the Ni-mentioning

confidence: 99%

Electrodeposited Ni–Co–B Alloy Coatings: Preparation and Properties

Bekish

Poznyak

Tsybulskaya

et al. 2014

J. Electrochem. Soc.

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Ternary Ni-Co-B alloys with boron content up to 27 at% were electrodeposited from sulfate-chloride electrolyte containing sodium decahydro-closo-decaborate as a boron source, and the effect of the boron content on the structure, morphology, corrosion, mechanical and magnetic properties of the alloy coatings was studied. With increasing the boron content the structure of the alloys is changed from polycrystalline to amorphous-nanocrystalline and then to amorphous, and the surface becomes more smooth and uniform. During prolonged corrosion testing in 3.5% NaCl solution the amorphous alloys with high boron content demonstrate a gradual decrease in the corrosion rate due to the formation of a rather compact film of the corrosion products consisting of nickel-cobalt hydroxides. In addition, the amorphous Ni-Co-B coatings are less susceptible to the pitting corrosion in comparison with polycrystalline and amorphous-crystalline ones. The boron doping of the Ni-Co alloys improves significantly their mechanical properties. Amorphous Ni-Co-B coatings containing 20 at% B and 10 at% Co demonstrate the highest microhardness and wear resistance. At high content of boron and cobalt, the Ni-Co-B alloys are magnetically soft ferromagnetic materials with high magnetic permeability and low coercivity.

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Section: Electrochemical Deposition Of Ni-co-b Alloy Coatings-the Ni-mentioning

confidence: 99%