Response evaluation of AA8011 with nano ZrB2inclusion formultifunctional applications: Considering its thermal, electrical, andcorrosion properties

Fayomi, J. and Popoola, A. P. I. and Popoola, M.O. and Fayomi, O. S. I and Ajenifuja, E. (2021) Response evaluation of AA8011 with nano ZrB2inclusion formultifunctional applications: Considering its thermal, electrical, andcorrosion properties. Journal of Alloys and Compounds, 853. ISSN 0925-8388

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Abstract

Researches have shown severally that AA8011 alloy is limited in its multifunctional applicationsnotwithstanding its intrinsic properties. Nevertheless, these properties can be improved by compli-menting with high-grade reinforcement that have better Performance characteristics. In this investiga-tion, AA8011 properties are improved by ZrB2inclusion through a two-step stir casting process toenhance the thermal and corrosion resistance without significantly affecting the electrical properties.The thermal behaviour was analyzed using a thermogravimetric analyzer (TGA) and differential thermalanalyzer (DTA), the corrosion response was studied with auto lab potentiodynamic polarization in 3.5%NaCl, the surface degradation after corrosion was observed with scanning electron microscope (SEM),and the electrical performance was carried out on the four-point probe meter. From the experiments, adecrease in the composite mass loss; improved melting temperature of about 674.4ᵒC in the presence ofZrB2addition as a function of the temperature rise was achieved by TGA and DTA respectively. The highcorrosion resistance of 7831.7Uand low corrosion rate of 0.5017 mm/yr at AA8011-20 wt% ZrB2wasobtained, this was characterized by little or no visible pitting corrosion as revealed by SEM. Theenhancement of the thermal stability and the improvement of the corrosion resistance prowess ofAA8011 without an obvious compromise on its electrical behaviour is an indication that AA8011-ZrB2composite is a novel composite material for multifunctional application mostly where improved aluminium alloys are required

Item Type:	Article
Uncontrolled Keywords:	Stir castingAA8011-ZrB2Aluminium metal matrix composites Thermal Electrical Corrosion
Subjects:	T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Hannah Akinwumi
Date Deposited:	21 Oct 2020 14:46
Last Modified:	21 Oct 2020 14:46
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/13663

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