Efendi, Radit Nikles (2025) Studi Eksperimen dan Analisis Pengaruh Variasi Parameter Ball Milling Terhadap Kapasitas Penyimpanan Hidrogen Pada Paduan Magnesium AZ31. Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 2039211011_Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
2039211011_Undergraduate_Thesis.pdf Restricted to Repository staff only Download (3MB) | Request a copy |
Abstract
Penelitian ini bertujuan untuk mengevaluasi pengaruh variasi parameter ball milling, yaitu kecepatan putar (RPM), durasi milling, dan Ball-to-Powder Ratio (BPR), terhadap struktur kristal, morfologi, serta kapasitas absorpsi dan desorpsi hidrogen pada paduan magnesium AZ31. Serbuk AZ31 dimodifikasi menggunakan metode High Energy Ball Milling (HEBM), kemudian dikarakterisasi menggunakan X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), dan Sievert-type pparatus. Hasil XRD menunjukkan bahwa ukuran kristalit terkecil diperoleh pada Sampel 4 (300 RPM, 10 jam, BPR 1:20) sebesar 16,68 nm. SEM menunjukkan ukuran partikel terkecil juga terdapat pada Sampel 4, yaitu 51,53 µm. Kapasitas penyimpanan hidrogennya mencapai 3,502 wt% dan kapasitas pelepasan −3,766 wt%. Sementara itu, Sampel 6 (500 RPM, 10 jam, 1:10) menunjukkan hasil paling rendah akibat aglomerasi dan kemungkinan oksidasi. Hasil penelitian ini menegaskan bahwa kombinasi
parameter yang seimbang lebih efektif menghasilkan struktur mikro dan sifat fungsional yang optimal untuk aplikasi penyimpanan hidrogen berbasis magnesium.
================================================================================================================
This study aims to evaluate the effect of ball milling parameters namely rotational speed (RPM), milling duration, and Ball-to-Powder Ratio (BPR) on the crystal structure, morphology, and hydrogen absorption desorption capacity of AZ31 magnesium alloy. The AZ31 powders were processed using High Energy Ball Milling (HEBM) and characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and a Sievert-type Apparatus. XRD results showed that the smallest crystallite size was obtained in Sample 4 (300 RPM, 10 hours, BPR 1:20) with a value of 16.68 nm. SEM analysis indicated the smallest particle size also belonged to Sample 4, at 51.53 µm. The hydrogen storage capacity reached 3.502 wt%, with a desorption capacity of −3.766 wt%. In contrast, Sample 6 (500 RPM, 10 hours, BPR 1:10) exhibited the lowest performance due to particle agglomeration and potential oxidation. These results suggest that a balanced combination of milling parameters is more effective in producing optimal microstructures and functional properties for hydrogen storage applications based on magnesium materials.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | AZ31 Magnesium, Ball Milling, HEBM, Crystallite Size, Hydrogen Storage |
| Subjects: | Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC173.4.C63 Composite materials Q Science > QD Chemistry > QD502 Chemical kinetics |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Radit Nikles Efendi |
| Date Deposited: | 24 Jul 2025 07:04 |
| Last Modified: | 24 Jul 2025 07:04 |
| URI: | http://repository.its.ac.id/id/eprint/121217 |
Actions (login required)
 |
View Item |