Diffusion of Si in FeSi containing 8 to 11 at% Si

Mirani, H. V. M.; Maaskant, P.

doi:10.1002/pssa.2210140218

Cited by 41 publications

(11 citation statements)

References 5 publications

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“…[40] Table III. Composition Ranges of the Selected Experimental Measurements [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] with experimental datapoints of Gro¨bner, [43] Vignes, [44] Bergner and Khaddour, [46] and Fridberg et al [56] The type of experimental diffusion coefficient is defined as i impurity diffusion, c chemical diffusion, and e estimated diffusion.…”

Section: Fig 6-calculatedmentioning

confidence: 99%

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Miettinen

Koskenniska

Visuri

et al. 2020

Metall Mater Trans B

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In this study, a set of thermodynamic, kinetic, and microstructure data is presented to simulate the non-equilibrium solidification of Fe-Al-Mn-Si-C alloys. The data were further validated with the experimental measurements and then used in a thermodynamic–kinetic software, IDS, to establish the effect of the alloying and cooling rate on the solidification behavior of high-AlMnSi (Al ≥ 0.5 wt pct, Mn ≥ 2 wt pct, Si ≥ 1 wt pct) steels. The modeling results were additionally validated by conducting electron probe microanalysis (EPMA) measurements. The results reveal that (1) solidification in high-AlMnSi steels occurs at much lower temperatures than in carbon steels; (2) increasing the cooling rate marginally lowers the solidus; (3) the microsegregation of Mn in austenite is much stronger than that of Si and Al due to the tendency of Al and Si to deplete from the liquid phase; (4) the residual delta ferrite content may be influenced by a proper heat treatment but not to the extent that could be expected solely from thermodynamic calculations; (5) in high-AlMnSi steels containing less than 0.2 wt pct carbon, the cracking tendency related to the strengthening above the solidus and the shell growth below the solidus may be much lower than in carbon steels.

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Section: Fig 6-calculatedmentioning

confidence: 99%

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Miettinen

Koskenniska

Visuri

et al. 2020

Metall Mater Trans B

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“…The phenomenon is known as room temperature short-range ordering, named after the temperature at which it was observed. The silicon interdiffusion depends of the relative compositions and the self-diffusion coefficients, according to Darken's equation as studied in [81] . Other measurements of diffusion, based on electron microprobe, show the influence of ordering in diffusion: according to Heikinheinmo [82] , the interdiffusion increases with Si-content in the disordered region, decreases slightly in the double-phase region of the phase diagram and increases again in the ordered (a 1 ) region.…”

Section: Room Temperature Ageingmentioning

confidence: 99%

“…Other measurements of diffusion, based on electron microprobe, show the influence of ordering in diffusion: according to Heikinheinmo [82] , the interdiffusion increases with Si-content in the disordered region, decreases slightly in the double-phase region of the phase diagram and increases again in the ordered (a 1 ) region. The diffusion cannot be studied at low temperatures due to lack of a suitable silicon radioisotope [81] , but the interdiffusion is estimated by extrapolation to have a value of 2.5×10 -23 [m 2 /s] at room temperature, from the values obtained by Rabkin et al [83] . This corresponds to roughly 1 jump/h on average.…”

Section: Room Temperature Ageingmentioning

confidence: 99%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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Silicon steel is an industrially-desired alloy of iron and silicon, characterised by soft magnetic properties, low eddy-current losses, and low magnetostriction. Silicon steels have narrow hysteresis cycles, making them particularly advantageous in applications using electromagnetic fields, such as transformers, generators, electric motor cores, and few other components in industry. Despite its incontestable industrial value, there is not much agreement on the atomic structure of silicon steel. Gaining better understanding of e.g. ordering processes in Fe-Si alloys could not only explain their magnetic properties, but also open opportunities to reduce their weaker characteristics, such as brittleness that adversely affects silicon steel workability and its associated high production costs. This review summarises the state-of-the-art knowledge about ordering in silicon steel and describes the most relevant experimental techniques used for studying its microstructure. In addition, the process of building the iron rich part of the Fe-Si phase diagram is explained. Lastly, the influence of order on the alloy's magnetic and mechanical properties is illustrated. KeywordsOrdering; Iron-silicon alloys; Intermetallic phases; Mechanical properties; Phase diagram. Revisión de fenómenos de orden en aleaciones hierro-silicio ResumenEl acero al silicio es una aleación de importancia industrial, caracterizada por propiedades magnéticas blandas, bajas pérdidas por corrientes de Foucault y baja magnetostricción. Los aceros al silicio tienen ciclo de histéresis estrecho, lo que es una ventaja en aplicaciones con campos electromagnéticos, como transformadores, generadores, núcleos de motores eléctricos y otros componentes industriales. A pesar de su incomparable valor industrial, no hay convenio sobre la estructura atómica del acero al silicio. Obtener mayor conocimiento sobre los procesos de orden no sólo podría explicar las propiedades magnéticas sino que también podría abrir vías para la reducción de sus características más débiles, como su fragilidad, la cual afecta negativamente a la fabricación del acero al silicio y se asocia con altos costes de producción. Esta revisión resume los últimos conocimientos sobre orden en acero al silicio y describe las técnicas experimentales más importantes usadas para estudiar su estructura. Además, se da una explicación sobre la construcción de la parte rica en hierro del diagrama de fases del Fe-Si. Por último se ilustra la influencia del orden en las propiedades magnéticas y mecánicas. Palabras claveOrden; Aleaciones hierro-silicio; Fases intermetálicas; Propiedades mecánicas; Diagrama de fases.

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“…The thinner layer by Oki and Tanikawa might be due to the slower Fe diffusion through FeSi. [19] D . [17] 6.…”

Section: Ks 36 Ksmentioning

confidence: 99%

Electroless coating of Fe₃Si on steel in the molten salt

Suzuki¹,

Nishibata²,

Nakanishi³

et al. 2000

Steel Research

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The corrosion‐resistive intermetallic compound Fe3Si could non‐electrolytically coat pure iron and mild steel. The disproportional reaction between Si and Si4+ ions deposited the homogeneous Fe3Si layer on the Fe substrates, by using solid silicon and the molten salt composed of NaCl‐KCl‐NaF‐Na2SiF6‐SiO2. SiF4 gas evaporation prevented from continuous siliconization, when only Na2SiF6 was used as Si4+ ion source. By adding SiO2 into the salt as another source, the molten salt became endurable for repeated usage in air. The layer of Fe3Si single phase with silicon mole fractions of 24 ± 1 % grew thicker than 200 μm by immersing for a few hours at 973 – 1173K.

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Diffusion of Si in FeSi containing 8 to 11 at% Si

Cited by 41 publications

References 5 publications

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

A review of ordering phenomena in iron-silicon alloys

Electroless coating of Fe₃Si on steel in the molten salt

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Diffusion of Si in FeSi containing 8 to 11 at% Si

Cited by 41 publications

References 5 publications

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

Thermodynamic, Kinetic, and Microstructure Data for Modeling Solidification of Fe-Al-Mn-Si-C Alloys

A review of ordering phenomena in iron-silicon alloys

Electroless coating of Fe3Si on steel in the molten salt

Contact Info

Product

Resources

About

Electroless coating of Fe₃Si on steel in the molten salt