Electrodeposition of Ni–Fe–Mn/Al₂O₃ functionally graded nanocomposite coatings

Abstract

In this study the Ni-Fe-Mn/Al 2 O 3 functionally graded (FG) coatings with thickness of 70 μm were fabricated onto mild steel substrates using pulse electrodeposition technique. Two types of FG coatings were deposited; the first type was synthesised through decreasing the pulse duty cycle gradually at a constant frequency and the second type was electrodeposited by increasing the frequency gradually at a constant duty cycle. The influences of pulse parameters including duty cycle and frequency on the microstructure, composition, microhardness corrosion and wear behaviour of electrodeposited FG nanocomposite coatings were evaluated. In the first type of coatings, Mn content was gradually decreased, also Fe and alumina contents changed in opposite directions. In the second type, chemical composition has not been affected through frequency alterations. The effect of frequency and duty cycle on the microhardness, corrosion and wear for different FG Ni-Fe-Mn/Al 2 O 3 nanocomposite coatings was investigated.

Gradient electrodeposition of Ni-Cu-W(alumina) nanocomposite coating

“…It is reported that coatings with proper mechanical properties can be obtained by the use of pulse currents [11]. Pulse plating also provides fabrication of novel structures such as functionally graded [12] and multilayer structures. By controlling and adjusting pulse parameters, namely the duty cycle and frequency, it is possible to control the structure and properties of deposited coatings in a more precise and efficient manner.…”

Effect of Percentage Weight and Particle Size of SiCp Reinforcement on the Mechanical Behaviour of Functionally Graded Aluminum Metal Matrix Composite

“…The fabrication of these functionally graded composite materials through various manufacturing techniques has attracted growing interest. Various researchers have manufactured FGM through techniques such as vapor deposition [1,2], atomic layer deposition [3,4], electrodeposition [5,6], laser deposition [7,8]. Other manufacturing techniques which have been explored and documented in existing literature are powder metallurgy [9,10], slip casting [11,12], stir casting [13] and centrifugal casting [14][15][16].…”

Ni–B/SiC nanocomposite coating obtained by pulse plating and evaluation of its electrochemistry and mechanical properties

“…From the materials engineering standpoint, the surface of materials has a crucial role since the most hazards usually initiate from the surface defects [1][2][3]. Nanocomposites coatings show brilliant physical, mechanical and chemical properties in different situations, thus they are proposed to be applied on the surface layer of different materials as an effective way to boost their wear and corrosion resistance [4][5][6][7][8][9].…”