The Electrodeposition of Ni‐Fe‐Cr Alloys for Magnetic Thin Film Applications

Harris, Tony; Whitney, Gina M.; Croll, I. M.

doi:10.1149/1.2044126

Cited by 25 publications

(16 citation statements)

References 2 publications

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“…Harris et al [16] reported that the ternary Ni-Fe-Cr alloys containing 8%Cr was electrodeposited from an aqueous solution containing acetic acid. They found that the acetic acid served to limit the precipitation of nonmetallic material on the electrode by forming a soluble complex with Cr 3+ ions.…”

Section: +mentioning

confidence: 99%

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

2012

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Abstract.Ferromagnetic Ni-Cr and Co-Cr alloy thin films were electrodeposited from aqueous solution containing trivalent chromium (Cr 3+ ) ions and glycine. According to the Tafel slopes obtained from the cathode polarization curves for Ni-Cr and Co-Cr alloy deposition, it was estimated that Cr 3+ ions inhibited Ni 2+ and Co 2+ ions from electrodepositing. Ni and Co preferentially electrodeposited rather than Cr and the electrodeposition process of Ni-Cr and Co-Cr was categorized to "normal co-deposition type." At the cathode potential of -1.8 V vs.Ag/AgCl/KCl sat., Ni-9.5%Cr and Co-8.4%Cr alloy deposits were obtained. X-ray diffraction patterns of the electrodeposits revealed that pure Ni and pure Co consist of large crystal grains, while Ni-9.5%Cr and Co-8.4%Cr alloys were composed of a solid solution phase with fine crystal grains. Magnetization of Ni-9.5%Cr and Co-8.4%Cr alloy thin films with fine crystalline phase reached to saturation at ca. 2.5 kOe in perpendicular direction to the film plane while pure Ni and pure Co thin film with large crystal grains were hardly magnetized in the perpendicular direction. Soft magnetic properties were improved with increasing Cr content in the deposits.

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Section: +mentioning

confidence: 99%

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

2012

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“…It was known that the addition of molybdenum to the deposits enhances the resistivity, but reduces the MR effect, which decreases to zero value at 4% Mo [12]. Chromium alloying has a smaller effect in decreasing MR up to 6% Cr [11]. In this work, we study the effect of the addition of both Cr and Mo to Permalloy films.…”

Section: Resultsmentioning

confidence: 98%

“…Therefore, it has became of an interest to investigate the deposition of the films from various solutions containing different metal ions as well as different complexing compounds for realization of the multi-elements alloy systems [10]. It has been reported that the addition of chromium to Permalloy caused a decrease in saturation induction (B s ) and anisotropy field (H k ) [11]. Also the electrical resistivity was one of the most important properties for soft magnetic films to be able to reach a good performance at high frequency.…”

Section: Introductionmentioning

confidence: 99%

The effect of the Cr and Mo on the physical properties of electrodeposited Ni–Fe alloy films

Ghorbani

zad

Dolati

et al. 2005

Journal of Alloys and Compounds

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“…The need for alternative surface coatings to replace conventional Cr coating from toxic hexavalent Cr baths has attracted great attention in recent years (Harris et al, 1995;McDougall et al, 1998;Song and Chin, 2002). Thus instead of using only Cr coating, Cr-Ni alloy coating has been applied on steel by thermal spray techniques and studies have been carried out on its hot corrosion behavior at 400 0 C in air and in air containing SO 3 (Ou et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Cr-Ni Alloy Electrodeposition and Comparison with Conventional Pure Cr Coating Technique

Moniruzzaman¹,

Rakib²,

Matin³

2012

Int J Automot Mech Eng

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Cr coating is widely used as the outer surface of precision parts due to its attractive appearance and superior corrosion resistance properties. It is obtained by electrodeposition via a conventional bath with hexavalent Cr ions. This manufacturing technique has many drawbacks, such as very low efficiency and high operating temperature and it is hazardous to health. In this work, we studied a Cr-Ni alloy deposition technique and compared the alloy coating properties to those with conventional Cr coating. Sequential two-step alloy electrodeposition was also compared. We took varying concentrations of Cr, Ni and complexing agents for the electrodeposition of Cr-Ni alloy and sequential Cr-Ni alloy coating on mild steel. Operating parameters, i.e. current density and temperature, were varied to examine their effects on the coating properties. The coatings thus obtained were characterized by visual observation, corrosion test, microhardness measurement, morphology and chemical analysis. The Cr-Ni alloy coating was found to be more corrosion resistant in 5% NaCl solution and harder than the pure Cr coating obtained by conventional electrodeposition. Toxic gas was produced in a much lower extent in the alloy coating than the conventional Cr coating technique. Again, the two-step Cr-Ni alloy coating was found better in terms of corrosion resistance as well as hardness compared to the Cr-Ni alloy coating. The process was also found to be much more environmentally friendly.

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The Electrodeposition of Ni‐Fe‐Cr Alloys for Magnetic Thin Film Applications

Cited by 25 publications

References 2 publications

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

Soft magnetic properties of Ni–Cr and Co–Cr alloy thin films electrodeposited from aqueous solutions containing trivalent chromium ions and glycine

The effect of the Cr and Mo on the physical properties of electrodeposited Ni–Fe alloy films

Cr-Ni Alloy Electrodeposition and Comparison with Conventional Pure Cr Coating Technique

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