Mechanical properties, tribology and electrochemical studies of Al/Fly ash/eggshell aluminium matrix composite

Ndudim H. Ononiwu*, Chigbogu G. Ozoegwu, Nkosinathi Madushele, Ojo Jeremiah Akinribide, Esther T. Akinlabi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
7 Downloads (Pure)


This work was carried out to investigate the effect of carbonized eggshells (CES) and fly ash on the microstructure, mechanical properties, wear, and corrosion characteristics of Al-Si12. The weight fraction (wt.%) of the CES particles was kept constant at 2.5 wt.%, while that of fly ash was varied at 2.5 wt.%, 5.0 wt.%, 7.5 wt.%, and 10.0 wt.%. The selected fabrication route was stir casting. The x-ray diffraction (XRD) analysis of the cast aluminum matrix composites (AMCs) revealed the presence of phases including α-aluminum, SiO2, and Si with the formation of the intermetallic CuAl2 phase. The microhardness of the cast samples increased with increasing weight fraction of the reinforcements up to the 7.5 wt.% fly ash sample. The tensile strength and compressive strength were highest for the 2.5 wt.%/CES 2.5 wt.%. Tribology studies showed that the lowest wear rate of 4.91 × 10-5 mm3/Nmm was obtained for the 2.5 wt.% fly ash sample, while the corrosion studies showed that the corrosion rate of 2.70 × 10-5 g/hr was lowest for the 2.5 wt.% fly ash as well.

Original languageEnglish
Pages (from-to)4900-4919
Number of pages20
JournalBiointerface Research in Applied Chemistry
Issue number4
Early online date16 Oct 2021
Publication statusPublished - 15 Aug 2022
Externally publishedYes

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