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Jurnal Rekayasa Material, Manufaktur & Energi
Published by Universitas Muhammadiyah Sumatera Utara
ISSN : 26227398     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal Rekayasa Material, Manufaktur & Energi, yang diterbitkan oleh Fakultas Teknik, Program Studi Teknik Mesin, Universitas Muhammadiyah Sumatera Utara (UMSU), Medan, Sumatera Utara, Indonesia, Jurnal Rekayasa Material, Manufaktur & Energi menerima artikel ilmiah hasil-hasil penelitian, dan eksperimen, yang mencakup pada bidang Rekayasa Material, Manufaktur dan Energi, Mesin, dan ilmu yang relevan pada sektor terkait.
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Articles 250 Documents
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Pengaruh Densitas Terhadap Kuat Tekan Pada Pembuatan Paving Block Dengan Penambahan Goni Plastik Harahap, Sarah Aprilia; Masthura, Masthura; Jumiati, Ety
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26377

Abstract

This study aims to determine the effect of adding plastic jute on the physical and mechanical properties of paving blocks, as well as to determine the optimal mixture composition. Plastic jute is used as an additional material in the paving block mixture along with sand and cement. Three composition variations were used in this study: Sample A (1% plastic jute, 64% sand, 35% cement), Sample B (3% plastic jute, 62% sand, 35% cement), and Sample C (5% plastic jute, 60% sand, 35% cement). Tests were conducted on the density and compressive strength of the paving blocks. The test results showed that Sample A had the highest density (1886.57 kg/m³), a compressive strength of 10 Mpa. These values meet SNI standards and indicate the best quality compared to other samples. Samples B and C have lower values, especially in water absorption and compressive strength. Thus, the addition of plastic jute significantly affects the quality of paving blocks, and the most optimal composition is found in Sample A. The use of plastic jute not only improves the characteristics of paving blocks but also helps reduce plastic waste in the environment.
Tinta Alami Berbasis Ekstrak Bit, Pektin dan Kitosan: Potensi Sebagai Alternatif Tinta Ramah Lingkungan Muryeti, Muryeti; Fachturozi, Nizar Ikhwanul
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26415

Abstract

The growth of the food and packaging industry demands the use of printing inks that are safe for both health and the environment, while conventional inks still contain heavy metals and volatile organic compounds (VOCs) that pose risks of irritation and pollution. Natural components such as beetroot extract, pectin, and chitosan have potential to produce eco-friendly inks; however, previous studies remain partial and lack comprehensive formulations. This study aims to formulate bio ink based on beetroot extract, orange peel pectin, and chitosan as a sustainable printing alternative. A total of 24 formulations were tested with chitosan (0–5 mL) and beetroot extract (4–8 g) at 60 °C and 80 °C. Results showed viscosity ranged from 27.983–117.667 s at 60 °C and 12.31–104.357 s at 80 °C, with chitosan significantly acting as a thickening agent. Solid content was 98.103–99.597% (60 °C) and 97.527–99.360% (80 °C), with lower chitosan levels yielding higher stability. Color analysis revealed L* decreased with increasing beetroot extract (83.710–88.087 at 60 °C; 75.847–85.743 at 80 °C), a* increased especially in K5B8 (11.443–18.840), while b* shifted from –6.500 to +0.893. ΔE values ranged from 2.13 (K1B6, most stable) to 12.49 (K5B8, least stable). These findings confirm that chitosan and beetroot extract strongly influence viscosity, solid stability, and color intensity, supporting the development of eco-friendly natural inks.
Rekayasa Antarmuka ETL dan HTM Bebas Dopan untuk Sel Surya Perovskit Efisien dan Stabil Alifqi, Syeva Arsya Wahyu; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.27035

Abstract

Perovskite solar cells (PSCs) have demonstrated remarkable power conversion efficiencies (PCEs), yet their path to commercialization is critically hindered by significant non-radiative recombination losses and long-term operational instability. These degradation pathways and efficiency losses are predominantly located at the interfaces between the perovskite absorber and the charge transport layers (ETL and HTM). The state-of-the-art often relies on high-temperature processed TiO₂ as the ETL and the expensive, hygroscopic dopant-reliant Spiro-OMeTAD as the HTM, which themselves are primary sources of instability. The research gap is the urgent need for stable, low-cost, and particularly dopant-free interfacial materials that can be processed at low temperatures. This literature review synthesizes and analyzes recent progress in interface engineering, focusing on low-temperature ETL alternatives (e.g., fullerene derivatives and ZnO) and the development of high-performance dopant-free HTMs. We conclude that replacing the problematic Spiro-OMeTAD with stable, dopant-free alternatives, such as the polymer P3HT or robust inorganic materials like NiOₓ and CuGaO₂, is the most critical and effective strategy for realizing efficient, stable, and commercially viable perovskite photovoltaics.
Analisa Perbandingan Uji Performa Pelumas Sintetik dan Pelumas Mineral Pada Aplikasi Sepeda Motor Honda Vario 150 Maulana, Iqmal; Suardi, Suardi; Abdillah, Tomi
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.27354

Abstract

Lubricants play a crucial role in every component of an automotive engine, including motorcycles. Without lubricants, the engine cannot function properly. Lubrication reduces friction between components such as piston rings and linear bearings, cools the engine (coolant), prevents wear, and protects against corrosion. Lubricant additive technology can even remove contaminants from fuel combustion, keeping the engine clean and efficient. Synthetic lubricants are made from chemically processed hydrocarbons, resulting in superior formulas compared to mineral lubricants, with a balanced formula structure, lower SAE viscosity grade, optimal oxidation resistance, and performance, as well as detergent and metal-protecting additives. Numerous performance tests of mineral and synthetic lubricants have been conducted, but these are limited to lubricant performance. Further testing is needed, including lubricant lifespan, solid contaminant content, and the cleanliness of engine components from deposits. This study conducted a road test on two samples of mineral lubricant and synthetic lubricant for automatic motorcycles, SAE 10W-30 API Service SL JASO MA. This test was applied to a Honda Vario 150 motorcycle used by an online motorcycle taxi driver who worked an average of 8 hours daily for 3 months. The lubricant was changed monthly, prior to laboratory testing, known as Used Oil Analysis (UOA). The test results demonstrated that the Shell Advance 10W-40 synthetic lubricant performed superiorly compared to the Federal 10W-30 mineral lubricant, with stable viscosity and total base number parameters, minimal particle contamination, and optimal engine component condition.
Pemanfaatan Selulosa Ampas Tebu Sebagai Bahan Baku Dalam Pembuatan Bioplastik Berbasis Pati Umbi Talas Mawar, Mawarni; Daulay, Abdul Halim; Husnah, Miftahul
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26910

Abstract

Synthetic plastics are made from materials that come from petroleum. These materials do not break down easily and are not affected by chemicals or microbes. Because of this, they last a long time and are hard to get rid of in the environment. Most of these plastics are used only once, which causes a lot of waste over time. It can take up to 1,000 years for these plastics to break down on their own. This study looked at using cellulose from sugarcane bagasse as a material added to bioplastics made from taro starch. Glycerol was used to make the plastic more flexible. Different amounts of cellulose (0 g, 0.5 g, 1 g, and 1.5 g) were mixed with 5 g of taro starch and 2 ml of glycerol. The mixture was then dried. The bioplastics were tested for water absorption, how well they break down, how strong they are, how much they stretch, and their chemical structure using FTIR analysis. The results showed that adding cellulose changed the bioplastics' properties. More water was absorbed, they became stronger and more stretchy, but they broke down less. The best results came when 1.5 g of cellulose was added. This gave a tensile strength of 1.54 MPa, which meets the ASTM E8M standard, and an elongation of 66.7%, which meets the ASTM D882-12 standard. Overall, mixing taro starch with sugarcane bagasse cellulose made better bioplastics, especially in terms of strength and stretch, although the rate at which they break down was lower.
Analisis Komparatif Metode Pembuatan Cahaya Matahari Untuk Modul Fotovoltaik Berdasarkan Studi Literatur Athallah, Muhammad Rafi; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26510

Abstract

The testing and evaluation of the performance of photovoltaic (PV) modules of different brands and types are imperative for acquiring the higher efficiency of solar energy conversion under different conditions. [Other Content]Read: BCI survey about Artificial Intelligence may have impacted those data+Sing up to be the first to know Eclipse+ Live 1For related articles:Artificial Sunlight [BCI]Artificial Sunlight For Artificial IntelligenceArtificial Sunlight: Reconstructing Data from Sunlight Simulation [Sci Graph]Artificial Sunlight: Ways to Understand Your Computer[How]At the same time, natural sunlight can be an obstacle to getting accurate, consistent data under similar environmental conditions so sundlight simulators are used to replicate controlled lighting conditions. So far, different types of solar light simulators have been developed, including halogen, xenon and LED lamps, each possessing advantages and disadvantages in terms of light spectrum, intensity, stability, and energy efficiency. However, there is no systematic comparative assessment of how each method simulates the photon spectrum of sunlight and its stability, and this has made it challenging for the scientific community to select the most suitable method. This study introduces a research deficit by directly comparing the spectrum accuracy, intensity stability, and sensitivity to environmental factors for each type of sunlight simulator. To overcome this gap, the objective in this study is to analyze and compare the performance of halogen, xenon, and LED simulators for identifying the most effective method for testing the electrical characteristics of PV modules inside the laboratory.
Tinjauan Perbandingan Metode Fabrikasi Dan Aplikasi Komposit Matricks Logam: Wawasan Dari Literatur Terkini Fitriyah, Hamidah; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26467

Abstract

Metal Matrix Composites (MMCs) have become a major focus in materials research due to their ability to combine the superior properties of metals and non-metallic reinforcements. This review article focuses on a comparative analysis of two key literatures, "Recent Advances in Fabrication of Metal Matrix Composites: A Systematic Review" and "Metal Matrix Composites," which represent perspectives on fabrication technique innovation and fundamental understanding of material properties. A literature search conducted through Scopus and Google Scholar using the keywords "metal matrix composites," "fabrication techniques," and "material applications" for the period 2015–2025 yielded relevant articles as supporting literature. The analysis shows that key advances in the past decade include the development of powder metallurgy, stir casting, and additive manufacturing methods, which have significantly impacted the mechanical strength, wear resistance, and thermal stability of MMCs. Meanwhile, the fundamental literature provides a strong theoretical foundation for selecting matrices and reinforcements for specific applications. The results of this review confirm that integrating knowledge from these two main areas, enriched with supporting literature, can accelerate innovation and optimization of MMC applications across various industrial sectors.
Peningkatan Mutu Kertas Cetak A Berbasis Kulit Talas Dan Serat Sawit Pada Sifat Fisis Sari, Devi Kumala; Jumiati, Ety; Daulay, Abdul Halim
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26666

Abstract

Paper is a thin material in the form of sheets that is one of the basic needs used by the community, paper is produced from the compression of fibers derived from pulp containing cellulose. This study aims to determine the characteristics of the paper produced and to determine the effect of the composition of the mixture of taro peel pulp and oil palm fruit fiber on paper quality. This study used the soda method, with variations in the weight of samples A (65%: 35%), B (45%: 55%), and C (25%: 75%). Taro peel and oil palm fruit fiber were first cooked with a 10% acetic acid solution, then bleached using a 10% H₂O₂ solution, then dried. The characterization results of the samples showed that sample C was the optimum sample with a grammage test value of 88 g/m2, a bulk test value of 1.25 cm3/g, and a SEM test value of 9,7089. This value shows that sample C has fulfilled some of the standard of SNI 7274:2008, so it can be concluded that the composition of taro peel pulp and oil palm fruit fiber produces paper with quite good quality.
Analisis Perbandingan (ECAP) Antara Material Aluminium-Silikon dan Silikon Karbida untuk Pelapisan Komponen Tahan Abrasi Aydin, Muhammad Syabil; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26892

Abstract

Aluminum-silicon alloy and silicon carbide (SiC) are materials known for their high thermal resistance and mechanical strength; however, their brittleness limits their use in mechanical structures, particularly for coating components that require abrasion resistance. Equal Channel Angular Pressing (ECAP), commonly applied to metals, is a plastic deformation technique with the potential to enhance the mechanical properties of brittle materials. While ECAP has proven effective in improving the hardness and microstructure of metals, its application to ceramic materials like SiC remains underexplored, especially for abrasion-resistant coatings. This study aims to analyze and compare the effects of ECAP on the hardness and microstructure of aluminum-silicon alloy and SiC annealed at 300°C, to evaluate their potential as abrasion-resistant coatings. The research methodology includes sample heating to 300°C, ECAP processing with a 120° die, Brinell hardness testing, and microstructure analysis using electron microscopy. The results of this study are expected to provide insight into the effectiveness of ECAP in enhancing the mechanical performance of these materials, expanding their potential for applications in abrasion-resistant coatings.
Analisis Perbandingan Efektivitas Dan Stabilitas Oksidasi Komposit Fe₃O₄/rGo, Fe₃O₄/Mxene, Dan Fe₃O₄/CNT Sebagai Material Penyerap Gelombang Radar Tauhidah, Adzka Kamilah; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.27043

Abstract

This research focuses on a literature review regarding radar wave absorbing materials or Radar Absorbing Material (RAM) that uses Fe₃O₄-based composites with three main matrices, namely reduced graphene oxide (rGO), MXene, and carbon nanotubes (CNT). This topic is important because the ability of a defense system, whether air, sea, or land, in reducing radar detection is greatly influenced by the effectiveness of electromagnetic wave absorbing materials. Fe₃O₄ materials are known to have strong magnetic properties, while rGO, MXene, and CNT function as conductive materials that can increase absorption through dielectric loss and impedance matching mechanisms. By understanding the comparative characteristics of the three, it is hoped that it will be possible to determine which material is the most effective and stable for use in stealth applications in defense environments.

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