Study on the Si penetration into Fe sheets using PVD method and its application in the fabrication of Fe-6.5wt.% Si alloys

Tian, Guangke; Bi, Xiaojun

doi:10.1016/j.surfcoat.2009.10.014

Cited by 14 publications

(2 citation statements)

References 21 publications

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“…In addition, grain growth and precipitation [14 and 15] were better controlled. Alternative production routes and optimisation of industrial thermomechanical routes [16][17][18] were proposed. For instance, hot dipping and diffusion annealing processes have been studied [19] .…”

Section: Historical Reviewmentioning

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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Section: Historical Reviewmentioning

confidence: 99%

A review of ordering phenomena in iron-silicon alloys

Villafañe¹,

Houbaert²

2013

REVMETAL

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“…Fe-Si alloys with high Si content can be produced by various methods such as: magnetron sputtering, rapid quenching, physical vapour deposition, co-injection, spray forming, or mechanical alloying [6][7][8]. Among the above mentioned methods, the mechanical alloying is a non-equilibrium technique suitable for producing a large range of materials especially in nanocrystalline/nanosized state [4,[9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of the Fe-10%Si Nanocrystalline Powder by Mechanical Alloying

Stanciu

Marinca

Popa

et al. 2014

SSP

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Fe-Si alloy with a Si content of 10 wt. % was obtained in nanocrystalline state by mechanical alloying of elemental iron and silicon powders. The mechanical alloying process was carried out in a high energy ball mill (Fritsch, Pulverisette 4) in argon atmosphere. The X-ray diffraction (XRD) studies indicated that after 4 hours of milling the Fe-Si alloy is formed. The mean crystallites size decreases down to 7 nm after 8 hours of milling. The particles morphology investigated by scanning electron microscopy (SEM) showed an evolution during milling process from two different kinds of particles to a one kind of particles with irregular shape. The magnetisation of powders decreases upon increasing the milling time up to 4 hours as a consequence of the Fe-Si alloy formation.

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Diffusion behavior of 3.2% Si-grain-oriented steel coated with Al by plasma vapor deposition

et al. 2015

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Diffusion annealing has been performed to investigate the influence of diffusion parameters on the diffusion behavior of 3.2% Si-grain-oriented steel coated with Al using plasma vapor deposition (PVD). When Fe-Si steel sheets coated with Al-PVD were annealed at 1373 K, a single-phase solution of Al with uniform concentration was formed in α-Fe without intermetallic phases. It was confirmed that Kirkendall voids nucleate during interdiffusion between solid Al and Fe in the annealing process and volume fraction of Kirkendall voids decreased as the heating rate increased. Rapid heating (55 K/s) can prevent the formation of Kirkendall voids, possibly by reducing the time available for interdiffusion between solid Al and Fe. The results show that the alloying of 2 wt% Al was achieved without the formation of interme-tallic phases and Kirkendall voids, and that this alloy can increase resistivity and reduce eddy current loss. This was found to results in reduced core loss by ~10%.

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Study on the Si penetration into Fe sheets using PVD method and its application in the fabrication of Fe-6.5wt.% Si alloys

Cited by 14 publications

References 21 publications

A review of ordering phenomena in iron-silicon alloys

A review of ordering phenomena in iron-silicon alloys

Synthesis of the Fe-10%Si Nanocrystalline Powder by Mechanical Alloying

Diffusion behavior of 3.2% Si-grain-oriented steel coated with Al by plasma vapor deposition

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