Effect of Al2O3 addition on hardness and wear behavior of Cu–Al2O3 electro-less coated Ag nanocomposite

Abstract

The present paper represents the experimental examination on the additions of Al2O3 coated Ag percent on the properties of Cu–Al2O3 coated Ag nanocomposites. With the object of enhancement dispersion of high weight fraction of Al2O3 nanoparticles and wettability in Cu matrix, nano Al2O3 particles were electroless coated via Ag particles. Four different Al2O3 content, 3, 6, 9 and 12 wt.% are considered to highlight its effect on the characteristics of the fabricated nanocomposite. High-energy ball milling is applied for mixing powders and compaction and sintering are applying for consolidation. Microstructural explanations displayed a homogenous distribution of Al2O3. The relative density decreases with increasing the content of Al2O3 nanoparticles. In addition, microhardness is increased gradually via the addition of nano Al2O3 coated Ag. Sliding wear rate decrease via increasing the Al2O3 coated Ag nanocomposite content and increase with increasing the applied load. Also, the coefficient of friction decreases via increasing the nano Al2O3 coated Ag nanocomposite content and increasing applied load.

Keywords

• Cu–Al2O3 nanocomposite
• Electrodeposition
• Microhardness
• Tribological properties