Al2O3 PARTICLE SIZE EFFECT ON REINFORCED CU COMPOSITES PRODUCED BY HIGH ENERGY MILLING

Authors : Kerim Emre ÖKSÜZ

Pages : 125-134

Doi:10.54365/adyumbd.1287821

View : 26 | Download : 26

Publication Date : 2023-08-31

Article Type : Research Paper

Abstract :Production of copper insert ignore into journalissuearticles values(Cu); composites with a reinforced Cu matrix using mechanical alloying with Aluminum oxide insert ignore into journalissuearticles values(Al2O3); particles of different sizes was achieved using high-energy ball milling procedure. The initial materials consisted of inert gas-atomized spherical electrolytic Cu powders containing 0.5 wt. % commercial Al2O3 powders, with particle sizes ranging from 10 µm to 1 µm. Cu powders with different particle sizes of Al2O3 were high-energy ball milled at 500 rpm for 3 hours to attain a consistent distribution of Al2O3 throughout in the Cu matrix. The powders that were high-energy ball milled were then subjected to cold-pressing at 500 MPa and isothermally sintered for 1.5 hours at 880°C in an Ar atmosphere. The fabricated copper composite materials were characterized using X-ray diffraction analysis insert ignore into journalissuearticles values(XRD);, field emission scanning electron microscopy insert ignore into journalissuearticles values(FE-SEM);, energy-dispersive X-ray spectroscopy insert ignore into journalissuearticles values(EDXS);, density and macrohardness tests. The wear properties and mechanism were investigated through tribological pin-on-disc experiments, which revealed that the reinforcing effect was more significant when finely dispersed Al2O3 particles were combined into the Cu matrix compared to coarse Al2O3 particles.
Keywords : Al2O3 partikülleri, Bakır kompozit, Karakterizasyon, Yüksek enerjili öğütme, Toz metalurjisi