Investigations on aluminium hybrid composites reinforced with ZrB2/Al2O3/Multi-Walled Carbon Nanotube (MWCNT) for aerospace applications
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초록
The Aluminium Alloy (AA7050) hybrid composites (AAHC’s) reinforced with 2-10 wt.% ZrB2 ceramic particles, 1-5 wt.%Al2O3 particles and 0.5-2.5 wt.% MWCNT in novel Vibro-compo casting through liquid casting route. The ZrB2 and Al2O3have been introduced in the conventional method, and MWCNT is injected by argon gas. Then, the stirring process wascarried out in different temperatures to enhance wettability between reinforcements and matrix. The developed AAHC’s werecharacterised using a Scanning Electron Microscope (SEM) and Energy-dispersive X-ray spectroscopy analysis (EDS). Themechanical properties like hardness, tensile, impact and fatigue tests were performed on all the casted samples elaborately. The dispersion of ZrB2 ceramic particles and its implanting over the ductile Al7050 matrix was effectively obtained, whichshown superior mechanical properties when compared to monolithic Al7050 alloy. The specimen contained 1.5%MWCNT +6%ZrB2 + 3%Al2O3 reveals the greater tensile strength, which is 30.73% higher than the base material. Besides, the EDSresults ensured the manufacturing of Al 7050/MWCNT + ZrB2+Al2O3 metal matrix composites successfully, and no otherintermetallic phases were identified.
Abstract
The Aluminium Alloy (AA7050) hybrid composites (AAHC’s) reinforced with 2-10 wt.% ZrB2 ceramic particles, 1-5 wt.%Al2O3 particles and 0.5-2.5 wt.% MWCNT in novel Vibro-compo casting through liquid casting route. The ZrB2 and Al2O3have been introduced in the conventional method, and MWCNT is injected by argon gas. Then, the stirring process wascarried out in different temperatures to enhance wettability between reinforcements and matrix. The developed AAHC’s werecharacterised using a Scanning Electron Microscope (SEM) and Energy-dispersive X-ray spectroscopy analysis (EDS). Themechanical properties like hardness, tensile, impact and fatigue tests were performed on all the casted samples elaborately. The dispersion of ZrB2 ceramic particles and its implanting over the ductile Al7050 matrix was effectively obtained, whichshown superior mechanical properties when compared to monolithic Al7050 alloy. The specimen contained 1.5%MWCNT +6%ZrB2 + 3%Al2O3 reveals the greater tensile strength, which is 30.73% higher than the base material. Besides, the EDSresults ensured the manufacturing of Al 7050/MWCNT + ZrB2+Al2O3 metal matrix composites successfully, and no otherintermetallic phases were identified.
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