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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Prosiding Seminar Nasional Teknik Mesin Recent in Engineering Science and Technology
Rahmiati, Tia
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : Recent in Engineering Science and Technology

 1 
Surface Character of Magnetic Ce-doped TiO2 for Photocatalytic Performance Enhancement Rahmiati, Tia; Chen, Ching-Cheng; Saad, Siti Asmahani; Eko, Nugroho; Apriana, Asep
Recent in Engineering Science and Technology Vol. 1 No. 01 (2023): RiESTech Volume 01 No. 01 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i01.2

Abstract

Using a modified sol-gel method for magnetic photocatalyst, the core shell structure of Ce-doped TiO2@SiO2@ferrite composite nanoparticles (NPs) was created. X-ray diffraction (XRD), Brunauer–Emmit–Teller (BET), and a superconducting quantum interference device (SQUID) were used to examine the physicochemical properties of the products as they were prepared. The ultraviolet-visible spectrometry (UV-vis) was used to measure the catalyst's photocatalytic activity. On the composite NPs' outer shell coating, the anatase phase related to the TiO2 structure was constructed. On the Ce-doped TiO2 layers, a mesoporous structure with uniform pore size was created, resulting in a specific surface area of 111.916 m2g-1. In the meantime, the thin TiO2 coating contained the redox couple of Ce3+ and Ce4+. An external magnetic field can also be used to separate the catalyst's magnetic NPs from the reaction system. In the aqueous solution of methylene blue (MB), the degradation efficiency and product performance were both 50 percentage
Dynotest Design Analysis for Electrical Converted Vehicles Sumarsono, Danardono Agus; Zainuri , Fuad; Hidayat Tullah, Muhammad; Noval, Rahmat; Prasetya, Sonki; Subarkah, Rahmat; Rahmiati, Tia; widi, Widiyatmoko; Ridwan, Muhammad
Recent in Engineering Science and Technology Vol. 1 No. 01 (2023): RiESTech Volume 01 No. 01 Years 2023
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v1i01.3

Abstract

The study comprises dynotest design and analysis to measure torque and horsepower. Basically, a dynotest carried out by apply certain load to the axle of a combustion motor through the braking mechanism of its crankshaft. Due to the high price of a Dynotest unit in the market, it is relatively difficult for a developing institution to own it on their site. The study target to design a simple and good accurate Dynotest within a reasonable price. The study used a common standard method for design analysis which rely on function and structural approach. Functionally, Dynotest is designed to be used to an ouput of an electical motor. Loading on motor shaft was done by disc brake braking mechanism. Structurally, Dynotest was designed to use rollers. As a main component, its mounting construction is connected to a motor to generate electrical power. Power transmitted from the motor to Dynotest through a center joint shaft, torque measured by load cell while the rotation of shaft itself counted by a digital tachometer. Test result show that electricity was produced from the simple construction and Dynotest functioned well in measuring it. Measurement data of roller support shaft performance showed a motor torque performance curve which are similar with the typical of similar Dynotest. Construction Test done by applying Solid Work software analysis to some components partially on rollers and on the construction assembly as a whole unit
An Analysis of the Effect of Feeder Volume on Shrinkage Porosity Defects in Piston Products through the Gravity Die Casting Process Banowati, Nabila; Noviaty, Veronika; Fernanda Alvi Yasin , Muhammad; Mulyono, Sugeng; Rahmiati, Tia; Wahyudi, Wandi; Rizkia, Vika
Recent in Engineering Science and Technology Vol. 2 No. 02 (2024): RiESTech Volume 02 No. 02 Years 2024
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v2i02.56

Abstract

To achieve defect-free casting (soundness casting) with a minimal amount of shrinkage porosity, refinement during the casting process is necessary. In the gravity die casting process, there are parameters that lead to product defects, especially in the casting design, focusing on the gating system and feeder system as pathways for the flow of molten metal to supply the molten metal into the mold cavity. This research was conducted to examine the effect of adding feeder dimensions on shrinkage porosity, specifically on Al-Si piston products with a Silicon content of 12-13%. Feeder dimensions were varied in nine variations by adding height and width to the feeder gate, initially measuring 90mm in height and 32mm in width, along with the addition of insulation to the feeder to retain the heat of the casting process. Cooling used water and argon, with water placed at the center core and pin core and argon placed on the outer mold, with a solidification time of 150 seconds and pouring time of 3 seconds considered constant. This study used a Computer Aided Engineering (CAE) approach, namely MagmaSoft or the application of software to model the gravity casting system process. The results showed the lowest percentage of shrinkage at feeder dimensions of 114mm in height and 45mm in width with a mold temperature of 220°C was 0.76% of the product
Co-Authors Adhitya, M. Asep Apriana, Asep Assagaf, Idrus Banowati, Nabila Chen, Ching-Cheng Danardono A.S, Danardono A.S Eko, Nugroho Fernanda Alvi Yasin , Muhammad Filzi, Rahman Fuad Zainuri, Fuad Hidayat Tullah, Muhammad Kusuma, Alam Jaya M. Ridwan Muhammad Ridwan Nova, Rahmat Noval, Rahmat Noviaty, Veronika Nugroho, Muhammad Fadhil Rahmat Subarkah Saad, Siti Asmahani Sonki Prasetya Subarkah, R. Sugeng Mulyono Sumarsono, Danardono Agus Todaru, M. Tullah, M. Hidayat Vika Rizkia Wahyudi, Wandi widi, Widiyatmoko Zainuri , Fuad