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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 230 Documents
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Sintesis Dan Karakterisasi Nanopartikel Fe3o4/Tio2-Co Dengan Variasi Suhu Kalsinasi Dalam Mendegradasi Methylene Blue Lubis, Hilwa Salsabila; Lubis, Ridwan Yusuf; Daulay, Abdul Halim
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21755

Abstract

A study has been conducted on the effect of calcination temperature on the characteristics of Fe3O4/TiO2-Co nanoparticles for the degradation of Methylene Blue. The nanoparticles were synthesized using the coprecipitation method. The aim of this research was to investigate the influence of calcination temperature on the morphological structure, crystal size, and degradation percentage of Methylene Blue, with variations in calcination temperatures of 400, 500, and 600 °C. The samples were characterized using Scanning Electron Microscope (SEM), X-ray diffractometer (XRD), and UV-Vis Spectrophotometer. The SEM results indicated that at a calcination temperature of 400 °C, agglomeration still occurred. The XRD analysis showed that as the calcination temperature increased, the crystal size decreased, with the sizes for FTC400, FTC500, and FTC600 samples being 30.53 nm, 30.13 nm, and 28.74 nm, respectively. The UV-Vis test results revealed that the higher the calcination temperature, the higher the degradation percentage, reaching 99.40% for the FTC600 sample
Sintesis Dan Karakterisasi Kertas Berbahan Dasar Kulit Pisang Kepok Dan Kulit Durian Pasaribu, Adella Ayu Putri; Daulay, Abdul Halim; Husnah, Miftahul
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.19480

Abstract

Research has been carried out which aims to find out whether paper can be produced from kepok banana peels and durian peels, as well as knowing the characteristics of the paper produced and the optimum variations. The materials used for Kepok banana peels and durian peels are waste from Kepok banana peels and durian peels that are no longer used. Variations in the composition of Kepok banana peel and durian peel used include 30:70 (sample A), 50:50 (sample B), 70:30 (sample C). The characteristics of this research are grammage test, tensile resistance test, tensile strength test, water content test, and (SEM) test. The research results showed that the grammage test results for sample A were 56.66 g/m², sample B was 53.33 g/m², sample C was 50.33 g/m². The tensile resistance test value for sample A is 2.218MPa, sample B is 0.247MPa, sample C is 1.074 MPa. The tensile strength test value for sample A was 0.37%, sample B was 0.29%, and sample C was 0.35%. The water content test value for sample A was 5.1%, sample B was 1.5%, and sample C was 4.3%. The optimum characteristics found in sample A are variations in mixing kepok banana peel and durian peel 30:70.
Rancang bangun mesin CNC router 3 axis dengan penggerak ballscrew untuk kerajinan acrylic Pancarana, I Dewa Made; Putrawan, I Made Agus; Gunawan, I Made Rai
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.22135

Abstract

This research aims to design, manufacture and test a 3-axis CNC router machine with a ballscrew drive that can process acrylic into an artistic craft that has accurate, precise, neat and effective dimensions. In this research, a design was carried out to design a 3 axis CNC router machine with a ballscrew drive that suits the needs of medium and large scale industries. The working principle of a 3 axis CNC router machine with a ballscrew drive is to create a design using CAD or CAM software, then the design is converted to G-code (machine code), so that the machine can work according to G-code coordinates. The results of this research include design and construction which includes design designs, design calculations, manufacturing processes, and results of the accuracy of using acrylic materials. The results of the design and construction of a 3 axis CNC router machine with a ballscrew drive, namely a cutting work area of 800 mm x 600 mm x 100 mm, using a Breakout board controller as a controller, using a PC or laptop to find out the MDI movement of G-code coordinates. The cutting results of spindle rpm 6000, 8000, and 10,000 with varying feed rates will affect the roughness of the workpiece cutting results. The conclusion from varying the feed rate is: the greater the feed rate in units (mm/minute), the rougher the cutting results. , and vice versa, if the feed rate is smaller, the results of cutting the workpiece will be smoother.          
Material Nanopartikel Fotokatalis Fe3O4/SiO2/TiO2 Untuk Degradasi Methylene Blue Lenni, Nurma; Lubis, Ridwan Yusuf; ., Masthura
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.21752

Abstract

This study aims to synthesize Fe3O4/SiO2/TiO2 photocatalytic material using the coprecipitation method with variations in calcination temperature and to investigate the effect of calcination temperature on the material characteristics as well as its ability to degrade methylene blue. The photocatalytic material was synthesized with a mass ratio of Fe3O4/SiO2/TiO2 of 3:2:2 and calcined at temperatures of 500 ˚C, 550 ˚C, and 600 ˚C. The material characterization was performed using X-Ray Diffractometer (XRD), Scanning Electron Microscope (SEM), and Ultraviolet-Visible (UV-Vis) Spectrophotometer. XRD results showed that increasing the calcination temperature led to an increase in crystal size from 28.01 nm at 500˚C to 30.06 nm at 600˚C. SEM analysis revealed morphological changes with an increase in particle size and agglomeration at higher temperatures, resulting in a denser and more porous surface. UV-Vis results showed that the FST600 sample, calcined at 600˚C, exhibited the highest methylene blue degradation rate, at 99.26%. This study demonstrates that higher calcination temperatures improve crystal size, enhance morphology, and increase the photocatalytic performance of Fe3O4/SiO2/TiO2 in methylene blue degradation.
Eksistensi Material Komposit Guna Menunjang Alutsista Pertahanan Negara Hutagalung, Ananda Yessica Margaretha; Aritonang, Sovian; Murniati, Riri
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.17378

Abstract

Composite materials have become an important aspect in the development of national defense equipment. In an effort to improve the performance and effectiveness of the main weapons system (alutsista), the application of composite materials has become a significant solution. This research aims to review the existence of composite materials in supporting national defense, focusing on the benefits, characteristics and important role in achieving excellence in defense equipment. The advantages of composite materials include strength, hardness, corrosion resistance, and lighter weight than traditional metals. With these characteristics, composite materials have had a positive impact on the development of national defense equipment. In a world that continues to change and becomes increasingly complex, the existence of composite materials in national defense equipment is a strategic step to maintain and increase military deterrence and effectiveness. This research will explain the role of composite materials in achieving this goal, as well as review the latest developments in the use of composite materials in the defense sector.
Tensile Modeling Of Composite Epoxy Modified With Nanosilica Particles ., Mulyadi; Siregar, A M
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.22547

Abstract

The addition of nanosilica particles can enhance mechanical properties of epoxy based composite materials. Tensile behavior is very crucial properties to be investigated due to its appearance frequently in the application. The amount of nanosilica (SiO2) particles was added in 2%, 5%,8 % and 10% of weight to epoxy resin Epikote 828. Dogbone tensile specimens of epoxy modified with nanosilica were tested using universal tensile machine. The results of tensile properties were further elaborated using available analytical model and finite element analysis. Analytical model and finite element analysis using computer can cut the time to market. As the result, the cost can be minimized  compare to experiment based assessment. Tensile behavior improvement is revealed as the nanosilica particles added. A very good correlation among the results from experiment, analytical and finite element analysis has been revealed. 
Fe (Ferro) Analysis of Iron Sand for Iron Pellet Juhana, Riyadi
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.22426

Abstract

Iron sand is the main ingredient of making iron pellets. Iron pellets are the main ingredient of steel plates. Iron pellets for steel industry in Indonesia are still imported from Sweden, Brazil, and Chille.  The reason for import that Ferro content in the local production of iron pellets is less than 60% (Fe 60%).  The effect that Ferro (Fe) quality in the local iron sand as the main ingredient of iron pellets is assumed to be less than 60%. This issue should prove that the assumption is incorrect. The research aims to prove that the level of Ferro contained in the local iron sand is more than or equal to 60%. The research also proves that local iron sand can be finished with quality iron pellets. The results showed that Ferro levels contained in local iron sand ranged from 71.03% to 73.05%, compared to Ferro levels outside of iron sand ranging from 61.00% to 68.90%. Based on the results of a comparison of Ferro rates on iron sand, Ferro content on local iron sand is greater than the iron sand content of Ferro abroad. Then it can be concluded that the level of Ferro in local iron sand is less than 60% is not proven, hence the reason steel industry uses imported iron pellets with the reason of Fe level local iron sand is less than 60%, not based on the results of scientific research.
Analisis Literatur Material Energetik Berbasis Nano-Komposit untuk Propelan Hibrida pada Roket Militer Sitompul, Robby Andreas Iskandar; Ruyat, Yayat; ., Marsono; Setyanjana, Andre Yoan
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.22479

Abstract

This research aims to analyze the literature on nano-composite-based energetic materials that can be used in hybrid propellants for military rockets. Hybrid propellants, which combine the properties of liquid and solid propellants, offer advantages such as improved combustion control and higher energy efficiency. In this context, nano-composite materials, such as metal nanoparticles (aluminum, boron) combined with oxidizers and polymer fuels, have great potential to improve the performance of hybrid propellants. This literature review identifies how the unique properties of nano-composites, such as large surface area, high reactivity, and the ability to control particle distribution, can accelerate the combustion rate and result in higher thrust. In addition, technical challenges such as controlling nanoparticle agglomeration, thermal stability, and environmental issues are discussed. This research provides an in-depth understanding of the application of nano-composite technology in the development of hybrid propellants and demonstrates the potential of these materials to improve the performance and safety of military rocket propellants. The findings are expected to serve as a basis for further research and development of more efficient hybrid propellants in the defense field.
Efektivitas Adsorben Berbasis Alginat Dan Karbon Aktif Ampas Kopi Dalam Menurunkan Kadar Cod Limbah Cair Industri Tahu Aisyah, Siti Nur; Daulay, Abdul Halim; Ong, Russell
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.23222

Abstract

Oxygen Demand (COD), requiring treatment before disposal into the environment. This study aims to evaluate the effectiveness of an adsorbent based on coffee waste-derived activated carbon and sodium alginate in reducing COD levels in tofu wastewater. The activated carbon used has been tested for quality and meets the Indonesian National Standard (SNI 06-3730-1995). The remediation process was conducted using five different adsorbent composition variations. The results showed that the combination of coffee waste-derived activated carbon and sodium alginate significantly reduced COD levels, achieving a maximum reduction efficiency of 90.55% at the optimum variation (Sample E). The adsorption mechanism involving alginate polymers and the porosity of activated carbon contributed to the effective removal of organic compounds from the wastewater. Based on the analysis, this method has proven to be effective in reducing COD levels, making it a potential environmentally friendly alternative for treating tofu industry wastewater.
Studi Eksperimental Rancang Bangun Alat Pencetak Briket Berbasis Dinamo Servo Kapasitas 6 Kg Lekatompessy, Frendris Allesandro; Kusumawardana, Ahmad Rizal Nurul; Dayera, Disabella
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.24096

Abstract

Research on the design of a servo dynamo-based briquette printer is a relevant research topic in the development of briquette production technology to support the utilization of biomass as a sustainable alternative energy source. The purpose of this research is to design a servo dynamo-based briquette printer with a capacity of 6 kg using the experimental method, where the test parameters are machine performance, printing operational parameters and briquette quality. The research results obtained are a briquette printing machine made with overall system dimensions of 23 cm high, 50 cm long and 25 cm wide, using a servo dynamo with a power capacity of 550 watts and a gearbox (ratio 1: 60). The results obtained are that the engine torque value obtained is 60 N.m and the maximum speed of 60 RPM has a machine efficiency value of 75.4%, where the high efficiency value contributes to more efficient energy consumption and has stable productivity, which is for a capacity of 6 kg capable of producing 180 briquettes for 12.32 minutes with an average production time per briquette of 4.2 seconds. The quality of the briquette test results from the machine made has a moisture content of 6.25% and a briquette density of 533.33 Kg⁄m3. Overall, the use of servo dynamo in the briquette molding machine is able to improve production efficiency and has fulfilled SNI 01-6235-2000.

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