Physical and mechanical response of porous metals composites with nano-natural additives

Abstract

Abstract The mechanical and physical characteristics of composites are made of reinforced palm leaves and copper, the green palm leaves in nanoparticles forms once, and another sample from ash powder of palm leaves with copper powder metal as a matrix that was studied. First, a Cu metal was complemented with green palm leaf at a ratio (10:20:30)% on a sub-micron scale and second with the ash of palm leaves with the same ratio (10, 20, and 30)% and as nanoparticles. Apparent porosity, thermal conductivity, SEM, and compressive strength were carried out. It was noticed that adding additives to Cu causes its apparent porosity rise, porosity value of Cu samples supported with green palm leaves fibers was higher than that of Cu samples supported with palm leaves ash, and the highest percent of porosity was for the sample supported with 30% green palm leaves fibers which were 2.4%. It is also clear from the results that the increase in the percentage of additives led to a significant decrease in the thermal conductivity, as it decreased from 385 W/m K for the unsupported copper sample to 175 W/m K for the green copper supported sample, which was the lowest value, while the lowest value recorded for the palm leaves ash supported sample was 253 W/m K. The results of the compression test showed that the inverse relationship between the percentage of additives and the value of the compressive strength, as the lowest value of the compressive strength estimated at 23 MPa was recorded for the copper sample reinforced with 30% green palm leaves, and it is the same sample that recorded the highest value for porosity as mentioned before.