1st International Conference on Engineering and Applied Natural Sciences, Konya, Türkiye, 10 - 13 Mayıs 2022, ss.482-485
In this study, the effect of B4C nano-particle content on the microstructure and mechanical
properties of Al2024 based nanocomposites reinforcement with hexagonal boron nitride (h-bN) and B4C
have been investigated. Al2024/h-bN/B4C hybrid nanocomposite was prepared by a powder metallurgy
routine involving high energy ball milling and hot pressing. Microstructure, density, hardness, and tensile
strength of the Al2024/h-bN/B4C hybrid nanocomposites were studied as a function of B4C nanoparticle
content. The mechanical milling process was executed in a planetary ball-mill for milling time of 4h. The
uniform distribution and dispersion of B4C and h-bN particles in the Al2024 matrix was examined by
scanning electron microscopy (SEM). It was showed that the amount of porosity, hardness and tensile
strenght values of nanocomposites increased with the increase in the content of B4C. According to test
results, the hardness of the B4C-free sample (0wt.% B4C) was 77 HB, while the value of the sample with 2
wt.% B4C increased to 97 HB. The samples including B4C particle content of 2 wt.% with a tensile strength
of 236 MPa, which is greater than the sample without B4C has a tensile strength of 164 MPa.