Electrospark Coatings Based on WC-Co Alloys with Aluminium Oxide and Carbon Additives

Abstract

<p align="justify"> <span style="font-family:Verdana;">The structure and properties of coatings based on WC-Co alloys containing additives of 1</span><span style="font-family:Verdana;">% - </span><span style="font-family:Verdana;">5% aluminium oxide and 2.5</span><span style="font-family:Verdana;">% - </span><span><span style="font-family:Verdana;">4.5% carbon were investigated. The coatings had a nanocrystalline structure. Depending on the duration and frequency of the discharge pulses, the ratio between WC and W</span>_{<span style="font-family:Verdana;">2</span>}<span style="font-family:Verdana;">C in the coatings was different. The additives in the hard alloy allowed us increase the microhardness and wear resistance of the coatings by a factor of 2</span></span><span style="font-family:Verdana;"> - </span><span style="font-family:Verdana;">3 in comparison to coatings created using a conventional WC-10%Co alloy.</span> </p

Effect of Nanoadditives with Surfactant on the Surface Characteristics of Electroless Nickel Coating on Magnesium-Based Composites Reinforced with MWCNT

“…Figures 12, 13, and 14 showed the variation of microhardness of ENcoating with respect to Al 2 O 3 , SiO, and ZnO. At low % of nanoadditives the microhardness value is low; when there is of trend was obtained by earlier researchers after adding nanoadditivesss in their respective studies [20,21]. nanoadditivesss, the EN-coatings show better wear resistance.…”