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Volume 137
Issue 1
10.3390/engproc2026137009
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Proceeding Paper

Addition of Al2O3 Fine to Aluminum–Alumina Composite by Stir Casting Manufacture †

by
Sri Mulyo Bondan Respati
*,
Nur Kholis
and
Ja’far Sodiq
Department of Mechanical Engineering, Universitas Wahid Hasyim, Kota Semarang 50224, Indonesia
*
Author to whom correspondence should be addressed.
†
Presented at the 9th Mechanical Engineering, Science and Technology International Conference (MEST 2025), Samarinda, Indonesia, 11–12 December 2025.
Eng. Proc. 2026, 137(1), 9; https://doi.org/10.3390/engproc2026137009
Published: 20 May 2026
(This article belongs to the Proceedings of The 9th Mechanical Engineering, Science and Technology International Conference (MEST 2025))
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Abstract

Aluminum waste is one of the oldest wastes to be decomposed and can be processed again. Processing of aluminum waste can be done using casting, but re-casting results in reduced aluminum strength. How to strengthen aluminum by making composites is of interest. Composites with aluminum waste base material can be reinforced with alumina. This research makes aluminum composites with the addition of alumina powder variations at 0; 15; 20; and 25%. The manufacturing uses stir casting at 500 rpm for 5 min and a pouring temperature of 750 °C. The casting results were photographed for tensile test specimens. The results of the macrostructure show the largest open porosity with the addition of 20% alumina. Meanwhile the results of tensile testing show that material without reinforcement has an average value of tensile strength of 182.33 MPa.
Keywords: composite; aluminum; alumina; casting; stir casting composite; aluminum; alumina; casting; stir casting

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MDPI and ACS Style

Respati, S.M.B.; Kholis, N.; Sodiq, J. Addition of Al2O3 Fine to Aluminum–Alumina Composite by Stir Casting Manufacture. Eng. Proc. 2026, 137, 9. https://doi.org/10.3390/engproc2026137009

AMA Style

Respati SMB, Kholis N, Sodiq J. Addition of Al2O3 Fine to Aluminum–Alumina Composite by Stir Casting Manufacture. Engineering Proceedings. 2026; 137(1):9. https://doi.org/10.3390/engproc2026137009

Chicago/Turabian Style

Respati, Sri Mulyo Bondan, Nur Kholis, and Ja’far Sodiq. 2026. "Addition of Al2O3 Fine to Aluminum–Alumina Composite by Stir Casting Manufacture" Engineering Proceedings 137, no. 1: 9. https://doi.org/10.3390/engproc2026137009

APA Style

Respati, S. M. B., Kholis, N., & Sodiq, J. (2026). Addition of Al2O3 Fine to Aluminum–Alumina Composite by Stir Casting Manufacture. Engineering Proceedings, 137(1), 9. https://doi.org/10.3390/engproc2026137009

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