The influence of pulse plating parameters on the hardness and wear resistance of nickel–alumina composite coatings

Electrodeposition of Metal Matrix Nanocomposites: Improvement of the Chemical Characterization Techniques

“…at low duty cycles, more particles are incorporated into the coating, due to continuous agitation, with renovation of the bath composition near the cathode. It seems that the duty cycle, has a greater influence on the amount of incorporated particles than simply the length of the off-time, indicated by pulse frequency (Bahrololoom & Sani, 2005). This effect is illustrated in figure 5 for the Ni-ZrB 2 system.…”

“…Moreover, in a study of pulse plating nickelalumina composite coatings, Bahrololoom and Sani investigated both the effect of the duty cycle and frequency on the composites hardness. They concluded that decreasing duty cycle and frequency together, increased the composites' wear resistance in the same way that pulse parameters influence their hardness (Bahrololoom & Sani, 2005). At constant average current density, a lower duty cycle means a higher peak current density.…”

“…A variety of nanosized particles, ranging from 4 nm to 800 nm diameters, have been successfully incorporated into metallic electrodeposits (Low et al, 2006). These include oxides such as Al 2 O 3 , ZrO 2 , TiO 2 and Cr 2 O 3 or carbides like SiC, WC, TiC or nitrides like Si 3 N 4 (Bahrololoom & Sani 2005;Jung et al, 2009;Srivastava et al, 2010;Krishnaveni et al, 2008;Stroumbouli et al, 2005;Gay et al, 2001).The metals mostly used are copper and nickel (Low el al., 2006) however other metals like zinc, silver and, alloys have been used (Gomes et al, 2005;Gay et al, 2001;Tulio & Carlos 2009;Muller et al, 2002;Tian & Cheng, 2007). The most studied system has been the Ni-SiC due to its potential technological applications (Low et al, 2006;Hovestad & Janssen 1995;Zimmermann et al, 2002;Hou et al, 2002;Garcia et al 2001;Gyftou et al, 2005;Lekka et al, 2005).…”

Photoconductive properties of pulse plated AgGaxIn1-xSe2 films

“…It is well known that by using pulse current for electrodeposition of metals and alloys it is possible to exercise greater control over the properties of electrodeposits and to improve them by modifying their microstructures [5]. It has been reported that a significant reduction in internal stress could be obtained when pulse current was used, compared to the use of conventional direct current [6].…”

Photoelectrochemical characteristics of CuIn_0.5Ga_0.5Se₂ Films

“…It is well known that by using pulse current for electrodeposition of metals and alloys it is possible to exercise greater control over the properties of electrodeposits and to improve them by modifying their microstructures [12].…”