Properties of low-cost MgB2 superconducting wires fabricated by high reduction cold rolling

Herbirowo, Satrio; Utomo, Edy Priyanto; Tinambunan, Dewi; Sinuhaji, Perdinan; Sofyan, Nofrijon; Yuwono, Akhmad Herman; Imaduddin, Agung

doi:10.1016/j.matpr.2023.01.250

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…Analysis of the Williamson-Hall method for this computational analysis gave an increase in crystallite size from 85.6 nm to 159.9 nm, with a slight decrease in the amount of crystallite strain. This showed that slightly higher oxide formation tended to increase the crystallinity of the wire towards the ceramic material (Herbirowo et al, 2023). MgB2 wire specimen for morphological analysis is presented in Figures 3 and 4.…”

Section: Resultsmentioning

confidence: 90%

Development of Magnesium Diboride Superconducting Wires through Hot Working with Different Initial Filling Density

Herbirowo,

Yuwono,

Sofyan

et al. 2023

IJTech

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This study aimed to investigate the use of the hot working in a sealed tube method for the production of Magnesium Diboride (MgB2) wires from a powder state. The wires were synthesized using different initial filling densities of 60%, 80%, and 100%. The Magnesium and Boron powder was ground using agate mortar into a stoichiometric mixture by weight of Mg:B=1:2 and then packed into a stainless steel (SUS316L) tube. Subsequently, the pack was sintered for two hours at 800°C in an air atmosphere and continuously rolled to form a wire. XRD and SEM analyses were then conducted to observe the phase development of the sample produced. The diffraction pattern and microstructure observation results showed that MgB2 phase was successfully created using economically advantageous raw materials of crystalline Mg and amorphous B with 60% filling density. The size of the crystallites and superconducting phase was shown to experience a significant increase. The R-T cryogenic magnet assessed the sample of critical temperature, and MgB2 produced using full amorphous boron had a transition temperature of 39 K.

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Section: Resultsmentioning

confidence: 90%

Development of Magnesium Diboride Superconducting Wires through Hot Working with Different Initial Filling Density

Herbirowo,

Yuwono,

Sofyan

et al. 2023

IJTech

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“…The sintered precursor was then hot-rolled into a wire using a rolling mill at a temperature of 500°C and a reduction ratio of 50% [8]. The wire was then cooled using three different methods: normalizing, full anneal, and water quenching.…”

Section: Methodsmentioning

confidence: 99%

Comparative analysis of MgB₂ superconducting wire for various cooling treatments through a sintering process

Herbirowo,

Pramono,

Sofyan

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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This paper presents a comparative analysis of MgB2 superconducting wire for various cooling treatments. The study investigates the effect of different cooling rates on the phase transformation, hardness, microstructure, and properties of the MgB2 wires. The samples were prepared by the powder-in-tube method using a mixture of magnesium and amorphous-boron powders through the sintering and hot rolling process The wires were cooled down at three different conditions, followed by characterization using X-ray diffraction, scanning electron microscopy, and hardness measurements. The results show that the cooling rate after sintering significantly impacted the microstructure and hardness strength of the MgB2 wires. A slower cooling rate led to a denser microstructure and higher hardness properties, while a faster cooling rate resulted in a more porous microstructure and lower hardness. However, it can be recommended further deformation for smaller wire sizes. These findings could provide insights into optimizing the sintering process to produce high-performance MgB2.

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“…Dimungkinkan untuk membuat kawat MgB2 baik secara in-situ maupun ex-situ. Penelitian sebelumnya telah dilakukan pada metode seperti doping elemen kimia, penyempurnaan butir, dan sintesis untuk meningkatkan kerapatan arus kawat superkonduktor [8][9][10][11] .…”

Section: Pendahuluanunclassified

Peningkatan Suhu Kritis Pada Sintesis Bahan Superkonduktor Magnesium Diborida Dengan Variasi Ukuran Partikel Serbuk Mg

Herbirowo,

Yuwono,

Utomo

et al. 2023

JRM

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Studying the evolution of the MgB2 superconductor manufacturing process to improve critical temperature is important. The solid-state approach was used in this work to create a low-cost MgB2 superconductor. Variations in the purity of Boron were used as control parameters to evaluate the impact of dry milling on the production of the MgB2 bulk and low-temperature electrical properties. A 2:1 stoichiometric ratio of magnesium and boron powder was weighed and ground for 30 minutes. The ground powder was compressed and sintered for one hour at 1073 K. We were able to confirm through XRD and SEM research that the small particle size improved the MgB2 phase fraction and increase crystallite size in the production of the MgB2 sample. At 1073 K and 200 um of Mg, the sample sintered produced an MgB2 phase of 99.3%. The critical onset temperature (Tc-offset) improved from 39 to 40K, respectively.

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Properties of low-cost MgB2 superconducting wires fabricated by high reduction cold rolling

Cited by 6 publications

References 18 publications

Development of Magnesium Diboride Superconducting Wires through Hot Working with Different Initial Filling Density

Development of Magnesium Diboride Superconducting Wires through Hot Working with Different Initial Filling Density

Comparative analysis of MgB₂ superconducting wire for various cooling treatments through a sintering process

Peningkatan Suhu Kritis Pada Sintesis Bahan Superkonduktor Magnesium Diborida Dengan Variasi Ukuran Partikel Serbuk Mg

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Properties of low-cost MgB2 superconducting wires fabricated by high reduction cold rolling

Cited by 6 publications

References 18 publications

Development of Magnesium Diboride Superconducting Wires through Hot Working with Different Initial Filling Density

Development of Magnesium Diboride Superconducting Wires through Hot Working with Different Initial Filling Density

Comparative analysis of MgB2 superconducting wire for various cooling treatments through a sintering process

Peningkatan Suhu Kritis Pada Sintesis Bahan Superkonduktor Magnesium Diborida Dengan Variasi Ukuran Partikel Serbuk Mg

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Comparative analysis of MgB₂ superconducting wire for various cooling treatments through a sintering process