Fabrication of Fe-Si-B Based Amorphous Powder Cores by Spark Plasma Sintered and Their Magnetic Properties

Yan, Liang; Yan, Biao; Yin, Jian

doi:10.3390/ma15041603

Cited by 10 publications

(3 citation statements)

References 20 publications

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“…It is due to the energetic effects of the reactions. Reaction (eq ) is an exothermic reaction, and under spark discharge conditions, endothermic reactions and high-temperature processes take place effectively. − The reactions (eq ), (eq ), and (eq ) are endothermic and therefore work well at the high temperatures that occur in spark discharges.…”

Section: Resultsmentioning

confidence: 99%

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

et al. 2023

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Ethanol steam reforming can be a source of green hydrogen. The process of producing hydrogen from ethanol is very complex. Catalysts designed for this process often become deactivated due to coke deposition. In this work, a plasma reactor was used, which is insensitive to disturbance induced by coke. The research focused on determining the influence of steam on the course of the process. The optimal water/ethanol molar ratio was found to be 4. The energy efficiency was the highest at this ratio, 22.5 mol(H 2 )/kW h. At the same time, a high ethanol conversion (92%) was obtained. It was also observed that the conversion of steam was many times lower than that of ethanol. However, water shortage caused a rapid increase in coke, acetylene, and ethylene production.

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Section: Resultsmentioning

confidence: 99%

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

et al. 2023

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“…The development of current information, nano-and biotechnologies depends on its solution. In recent decades, researchers have paid much attention to materials with an extremely nonequilibrium amorphous structure [1][2]. Modern methods of quenching from a liquid or vapor state, such as laser processing, electrochemical deposition, three-electrode ion plasma sputtering, extreme plastic deformation [3][4][5][6][7], have significantly increased the number of substances obtained in a noncrystalline state.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe-Si-B-(Cu,Nb,Ni,Mo) films by quenching from a vapor state

Ryabtsev,

Kushnerov,

Bashev

et al. 2023

J. Phys. Electron.

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Using modernized three-electrode ion-plasma sputtering, homogeneous thin films of Fe-Si-B-(Cu, Nb), and Fe-Si-B-(Ni, Mo) were obtained. The structure of the films was investigated by X-ray diffraction and electron microscopy. It was established that as a result of sputtering, amorphous and nanocrystalline phases with a coherent scattering region (CSR) size of 1.6 nm and 12 nm were formed in the Fe73Si16B7-(Cu, Nb)4 and Fe78.5Si6B14-(Ni, Mo)1.5 films. The thermal stability of metastable states of the films, as well as theelectrical and magnetic properties of freshly prepared and heat-treated films were studied. The conditions for obtaining films with small (modulo) values of the temperature coefficient of electrical resistance ( - 0.9∙10-5 K-1) and coercive force (HC ~ 11 A/m) were determined.

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“…The biggest challenge of PM steel is the 5–15 vol% porosity, which obviously deteriorates the mechanical and corrosion performances [ 1 , 2 , 3 ]. Several techniques, such as warm compaction, double-press double-sintering, powder forging, and spark plasma sintering can decrease the porosity, though these techniques greatly raise the production cost [ 4 , 5 , 6 , 7 , 8 ]. Liquid phase sintering (LPS) is an economical technique to facilitate the sintering densification of PM materials by adding specific alloying elements for liquid generation without obviously increasing the cost [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

Tsao

Tsai³

et al. 2022

Materials

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Powder metallurgy (PM) has been widely used to produce various steels in industry, mainly due to its capabilities for manufacturing nearly net-shaped products and mass production. To improve the performances of PM stainless steels, the roles of 0.6 wt% B additive in the microstructures, mechanical properties, and corrosion resistances of PM 304L austenitic, 410L ferritic, and 410 martensitic stainless steels were investigated. The results showed that adding 0.6 wt% B significantly improved the sintered densities of the three kinds of stainless steels due to the liquid phase sintering (LPS) phenomenon. The borides in 304L + 0.6B, 410L + 0.6B, and 410 + 0.6B were rich in B and Cr atoms but deficient in Fe, Ni, or C atoms, as analyzed by electron probe micro-analysis. Furthermore, the B additive contributed to the improved apparent hardness and corrosion resistance of PM stainless steels. In the 410L stainless steel, the 0.6 wt% B addition increased the corrosion voltage from −0.43 VSCE to −0.24 VSCE and reduced the corrosion current density from 2.27 × 10−6 A/cm2 to 1.93 × 10−7 A/cm2. The effects of several factors, namely: porosity; the generation of boride; the matrix/boride interfacial areas; Cr depletion; and the microstructure on the corrosion performances are discussed. The findings clearly indicate that porosity plays a predominant role in the corrosion resistances of PM austenitic, ferritic, and martensitic stainless steels.

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Fabrication of Fe-Si-B Based Amorphous Powder Cores by Spark Plasma Sintered and Their Magnetic Properties

Cited by 10 publications

References 20 publications

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma

Preparation of Fe-Si-B-(Cu,Nb,Ni,Mo) films by quenching from a vapor state

Improved Mechanical and Corrosion Properties of Powder Metallurgy Austenitic, Ferritic, and Martensitic Stainless Steels by Liquid Phase Sintering

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