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Zuliantoni, Zuliantoni
Universitas Bengkulu
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation

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Journal : jurnal polimesin

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Hydroxyapatite-reinforced Al-Mg composites for corrosion resistance in hanks' balanced salt solution zuliantoni, zuliantoni; Suprapto, W.; Setyarini, P.H.; Gapsari, F.
Jurnal Polimesin Vol 22, No 6 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i6.5473

Abstract

Aluminum-Magnesium (Al-Mg) matrix composites were fabricated using powder metallurgy. Ceramic particles such as synthetic hydroxyapatite and snail shell hydroxyapatite were used as reinforcing particles. Snail shell hydroxyapatite often shows superior corrosion resistance over manufactured hydroxyapatite because of its distinct structural integrity, biological compatibility, and trace element concentration. Aluminummagnesium matrix composites are lightweight metals with advantageous mechanical, physical, and density properties, making them suitable for applications in the automotive, aerospace, biomedical, and sports industries. However, their limited corrosion resistance has restricted their broader development and application. This study characterizes corrosion behavior of Al-Mg composites reinforced with HAss and HA bioceramic. Given that plastic deformation can improve corrosion resistance, powder metallurgy is one of the most promising techniques for improving a material's mechanical properties. Following HAss reinforcement testing, Al-Mg composites were contrasted. A compression pressure of 650 MPa was used to produce the samples at room temperature. Corrosion was measured using the potentiodynamic polarization electrochemical test in Hank's Balanced Salt Solution (HBSS). Out of all the AlMg/HAss composites, the 0.55Al-0.05Mg/0.40HAss composite exhibited the maximum corrosion resistance (9.58×10-4 mmpy), per the test results. 7.72×10-6 mmpy was the Al-Mg/HA composite's ideal corrosion resistance when combined with the 0.80Al-0.05Mg/0.15HA composite. The application of powder metallurgy in the production of the composites significantly improved their corrosion resistance. The Al-Mg/HAss AMC can also be used in biomaterials.
Design, simulation, and experimental validation of a 50 kg biomass-fired coffee drying oven Nuramal, Agus; Jaya, Efran Riansyah Rahmat; Suryadi, Dedi; Zuliantoni1, Zuliantoni; Hardiansyah, Hardiansyah; Putra, Rama Dani Eka
Jurnal Polimesin Vol 24, No 1 (2026): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i1.8603

Abstract

Despite coffee is one of the leading commodities in Bengkulu Province, the traditional drying process of coffee beans for 10-14 days are still a common practice. This research aims to design, fabricate, and evaluate the thermal performance of a 50 kg capacity wood-fueled coffee drying oven. A three-dimensional CFD model was developed using ANSYS Fluent to analyze temperature distribution within the drying chamber and optimize thermal performance prior to fabrication. Experimental testing was conducted to validate the numerical predictions under controlled operating conditions. The proposed technology is distinguished by its use of locally available biomass fuel. The results of the coffee drying oven simulation, under empty conditions, achieved the desired temperature based. The drying time for coffee beans in this research was 9 hours, achieving a moisture content of 10% to 13% (a moisture content of 12.5% is the Indonesian National Standard. Simulation results predicted chamber temperatures ranging from 67°C to 87°C with an inlet temperature of approximately 100°C, indicating adequate thermal conditions for drying. Experimental measurements showed good agreement with the CFD model, reaching near-steady thermal conditions within 25 minutes.
Co-Authors A Sofwan FA Agus Nuramal Agus Suandi, Agus Alqa, A Sofwan F Alqap, A. Sofwan F Angky Puspawan Antonius F A Silaen Anwar, Moh. Syaiful Arie Vatresia Aritonang, Jefri Fanto Asrol Asrol Aswata, Aswata Bismantolo, Putra Dedi Suryadi Eka Putra, Rama Dani FA, A Sofwan FA, A. Sofwan Fauzan, Ahmad Febriyanto, Dwi Firman Ridwan Fitri, Tessa Zulenia Gapsari, F. Gunawan, Agustin Gunawan, Agustin Hardiansyah Hardiansyah Hardiansyah Hardiyanto, Martin Helmizar Hendra, Hendra Hendri Hestiawan Hendri van Hoten Hermiyetti Hernadewita Hestiawan, Hendri Jaya, Efran Riansyah Rahmat Jhonni Rahman Khairul Amri Kharisma, Sunandi Muhadjir, Muhammad Imron Muhammad Farid Mulya Juarsa Nanda, Andany Rizka Nugraha, Kurnia Nurbaiti Nurbaiti Nurul Iman Supardi Panjaitan, Felix Budianto Prasetio, Dimas Prasetya Hariyanto, Kevin Purwo Subekti Putra, Rama Dani Eka Razali, Makmun Reza Roby Syaputra Saragih, Fernando Desfriandi Setyarini, P.H. Sipahutar, Yosua Adinata Sipayung, Evraim Sri Astuti Sri Ismarwanti, Sri Suprapto, W. Tarigan, Daniel Elieser Valentina, Pricylia Warsianto, Ardi Yose Rizal Yovan Witanto Yulianto, Dody