Investigation of the Structural and Magnetic Properties of the Cobalt-Nickel Alloys Fabricated in Various Electrolyte Solutions

Abstract

Cobalt-Nickel alloys have been widely used for decoration, in magnetic recording devices and corrosion resistance applications, etc. In this study, the influences of cobalt amount in electrolyte on the magnetic and structural properties of the electrodeposited Co-Ni alloys were investigated. An electrolyte solution, consisting of cobalt sulfate, nickel sulfate, nickel chloride and boric acid, was used in electrodeposition. The electrochemical investigation of Co-Ni alloys was completed using cyclic voltammetry and galvanostatic studies. The morphological and structural analyses of the alloys were performed using inductively coupled plasma, scanning electron microscopy, X-ray diffraction and vibrating sample magnetometer techniques. The effect of cobalt concentration on the magnetic properties, phase structure and grain size of the alloys was investigated. Magnetic hysteresis results indicate that the amount of the cobalt content in the electrolyte has a strong influence on the ferromagnetic behavior of fabricated alloys. Results of the study show that changing the electrodeposition parameters, such as composition of electrolyte solution, allows to fabricate alloys with different properties.

Effect of Laminated Structure on Mechanical Properties of Composition-modulated Co–Ni Laminated Plating

“…4,5) This composition-modulated Co-Ni laminated plating is available to produce by periodically varying stirring conditions during film formation in a single bath. Many of the studies [6][7][8][9][10][11][12] have been reported on the plating films consisted of the conventional metal multilayer films, but laminated structure producing required lamination in the plural different tanks or pulse electric plating as well as due to complicated manufacturing process, so that they are difficult to be put into industrial practice. In addition, there are many studies on the thickness of the constituent layers at the nanometer level, but there are few reports on thick films laminated with micrometer-level layers.…”

Elektrodepolama ile Üretilen Co, Ni ve CoNi Alaşımlı İnce Filmlerin Yapısal ve Manyetik Özelliklerinin İncelenmesi

“…In this method, the thin film coating process is much more favorable than the others due to some reasons: 1) production simplicity, 2) variety of deposition materials, 3) low-temperature processing and 4) control of the bath composition. In the electrodeposition process, the electrocatalytic property of the solution and the amount of energy consumed varies depending on the production conditions and the materials in the bath composition [21][22][23]. Fabrication of thin films by electrodeposition method is influenced by such factors as solution concentration, pH value, current density, additives, deposition (cathode) potentials, solution temperature, mixing of solution, continuous or pulsed current of the deposition [24][25][26].…”

Elektrodepolama ile Üretilen CoNi Alaşım İnce Film Kaplamaların Yapısal ve Manyetik Özellikleri Üzerine Ek Katkı Maddelerinin Etkisi

“…CoNi alaşım ince film kaplama malzemelerin mikro ve nanoyapılı olarak üretimi için elektriksiz kaplama, elektrokimyasal depolama (elektrodepolama), sol-gel işlemi, spin kaplama, kimyasal buhar depolama, moleküler ışın epitaksi (MBE), manyetik alanda sıçratma (sputtering) gibi yöntemler kullanılmaktadır [9][10][11][12][13]. Bu yöntemler içerisinde en fazla kullanılanlardan biriside elektrodepolama sistemidir.…”