Nano Al2O3 Oranının Ni-Co Matrisli Nano Kompozit Kaplamaların Tribolojik Özelliklerine Etkisi

Abstract

Due to the micro-electrical mechanical system (MEMS) and Nano-electrical mechanical system (MEMS) usage potential, Ni-Co based nanocomposite coatings have been remarkable. Especially, they are promises to solve tribological problem of MEMS and NEMS system. Therefore, Ni-Co alloy and Ni-Co/ Al2O3 composite coatings were prepared from a modified Watt's type electrolyte by Direct Current (DC) with 7A/dm2 current density and four different amounts of Al2O3 added to electrolyte concentration. Effect of amount of Al2O3 in the Ni-Co matrix on mechanical and physical properties were investigated. Produced composite coating layers structure were characterized with scanning electron microscopy (SEM) and X-ray diffraction (XRD). Mechanical properties were determined with Vickers microhardness test method. Tribological properties was carried out with reciprocating pin on disk system. As a result of investigation and characterization best mechanical and tribological properties were achieved with 1 g/l Al2O3 addition into electrolyte and at PRC current type.