The Microstructures and Mechanical Properties of Al2024/ h-bN/B4C Hybrid Nanocomposites Fabricated by Powder Metallurgy


Çelebi M., Çanakçı A.

1st International Conference on Engineering and Applied Natural Sciences, Konya, Türkiye, 10 - 13 Mayıs 2022, ss.482-485

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Konya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.482-485
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

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.