A Study of the Optimal Composition of the Bath Used for the Electrodeposition of Invar Alloy Thin Films

Abstract

Ni-Fe alloys ranging in composition of Fe rich invar (Ni100-xFeX, where x ~ 64), have a variety of high technology applications due to their wide spectrum of physical properties. In this paper, the effects of the applied potential (-1.20V, -1.35V) and the bath composition (0.1M, 0.01M) of the Ni-Fe alloy thin films are studied. Ni100-xFeX layers were electrodeposited onto Copper substrates with a pH of about 2.5. The experiments were performed at room temperature and the deposition time was equal to 10mn for all deposited samples. The experiments were performed using electrochemical techniques, by means of cyclic voltammetry (CV) and chronoamperometry (CA). The morphology and elemental composition of the deposited films were studied by means of electron microscopy coupled to EDS analysis.

Electrodeposited Ni_100-XFe_x Thin Films on Copper Substrates

“…Some fundamental aspects of interest related to the influence of electrochemical conditions (potentials, current and concentration) have been examined in previous works. The electrochemical study was performed using cyclic voltamery and chonoamperometry and the optimum conditions for the electrodeposion of Ni-Fe thins alloys were determined [7].The influence of the applied potential for two different bath compositions [0.1M] and [0.01M] was examined and the EDS spectra have revealed the following alloy compositions For all these experiments the applied potential was maintained for the same value -1.2V. The observation of the samples reveals a pratically the same appearence of deposits.…”

Preparation and Crystallization Kinetics of FeSiB Amorphous Ribbons under Non-Isothermal Regime

“…The ribbons preparation and the measurements took place in Slovak Academy of Sciences (Institute of Physics). The activation energy was estimated by the Kissinger model, which is described by the following Eq.1 [23][24][25]:…”

“…The calculation of the n(x) values was based on the extension of the JMAK model for non isothermal measurements and are given by Eq. 3,4 [23][24][25][26][27]:…”

“…Amorphous Fe-based ribbons are on a kinetically, metastable condition, and thus a transformation to a stable state can occur spontaneously or driven by an external energy such as heat. The present study attempts to shed light to the nucleation and growth mechanisms during solid state processes which influence the resulting microstructure and properties of these materials [1,2,13,19,[21][22][23][24][25].…”

Chronoamperometry Study of the Electrodeposited Ni_100-XP_x Alloy Thin Films

“…First of all, the used chemical solutions were freshly prepared according to the electrolytic composition given in table (1). Adopting the same approach used in our previous works [9,10], all Cyclic Voltammetry (CV) experiments were initiated in a negative direction, reversed at -1.4V in a positive direction. The voltammetric response showed a reduction peak related to mass transport in negative scan and the oxidation peak in the positive scan.…”