Permanent magnet properties of in-situ formed Cu–Fe multifilamentary compositesa)

Dublon, G.; Habbal, F.; Bell, J. L.

doi:10.1063/1.330357

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…To intensify the gravitational separation of the alloy and aluminum oxide as well as to induce convective mixing of the melt components, the synthesis was done with a centrifugal SHS machine [5] with 2 to 50a/g overloads, where a is centrifugal acceleration, g is gravitational acceleration. Figure 1 presents the main stages of the SHS method, i.e.…”

Section: Synthesis Of a Cast Alloy By Means Of Shsmentioning

confidence: 99%

“…According to the literature, Cu-Fe alloys are becoming of even greater interest [5,7,8,9]. Alloys of the Cu-Fe system with a Cu-based matrix (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…an increased concentration of Cu) are promising for creating high performance hard magnetic materials. [5,7] The system has an interesting structural peculiarity which is that its component phases actually do not interact, which enables selective effects on such structural components to cause targeted changes in the properties of the material. After necessary dispersion [5] of ferromagnetic Fe particles is achieved, and their form becomes isotropic, one can expect high magnetic energy values as it is known [5,7] that extended ferromagnetic particles of critical size do not prevent magnetic reversal in a non-ferromagnetic matrix.…”

Section: Introductionmentioning

confidence: 99%

“…[5,7] The system has an interesting structural peculiarity which is that its component phases actually do not interact, which enables selective effects on such structural components to cause targeted changes in the properties of the material. After necessary dispersion [5] of ferromagnetic Fe particles is achieved, and their form becomes isotropic, one can expect high magnetic energy values as it is known [5,7] that extended ferromagnetic particles of critical size do not prevent magnetic reversal in a non-ferromagnetic matrix. This is why developing low-cost and simple technology to produce such alloys and materials based thereon and to adjust their physico-mechanical properties is still a relevant problem when it comes to the production of such materials.…”

Section: Introductionmentioning

confidence: 99%

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Structural investigation of 70Cu/30Fe based cast alloy obtained by combined use of centrifugal casting-SHS process and forging

et al. 2017

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Abstract. This research is to test a combined chemical-technological chain of material production. The tests are made on a 70Cu/30Fe system. The technology consists of: 1-SHS of a cast material of a specific composition and 2-Mechanical and heat treatment, including: continuous swaging, where the workpiece is heated to 850⁰ C and then drawn cold. In this study first used SHS-metallurgy method for producing, in the molten pseudoalloy Cu-Fe system (Cu-70%, Fe-30 wt.%). It was found that the high temperatures melt the SHS provides increased solubility of Cu in Fe. Then, in the crystallization, by decreasing the melt temperature and reduce the solubility limit of copper is released in the form of small dispersed particles. The observed structure is typical only for SHS alloy.

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Section: Synthesis Of a Cast Alloy By Means Of Shsmentioning

confidence: 99%

“…According to the literature, Cu-Fe alloys are becoming of even greater interest [5,7,8,9]. Alloys of the Cu-Fe system with a Cu-based matrix (i.e.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural investigation of 70Cu/30Fe based cast alloy obtained by combined use of centrifugal casting-SHS process and forging

et al. 2017

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Ferromagnetic multifilamentary Fe and Ni wires with high coercive fields produced by powder metallurgy processing

Yao

Foner

1983

Applied Physics Letters

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Powder metallurgy processed multifilamentary Cu-Fe, Cu-Ni, and Nb-Ni ferromagnetic composite wires were fabricated with a relatively high coercive field Hc at room temperature. Compacts of Cu-36 wt. % Fe, Cu-36 wt. % Ni, and Nb-36 wt. % Ni powders were reduced in cross section to produce ferromagnetic multifilamentary materials. Nominal areal reduction ratios of 108 for Cu-36 wt. % Fe and 104 for Nb-36 wt. % Ni and Cu-36 wt. % Ni resulted in values of Hc ∼195 Oe, 94 Oe, and 77 Oe, respectively. A final 300 °C anneal of the Cu-36 wt. % Fe composite gave Hc ∼460 Oe. The average ferromagnetic fiber diameters are estimated to be 100–1000 Å for the Fe fibers and are about 1 μm for the Ni fibers.

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Рroduction of 70%Cu–30%Fe alloy by SHS metallurgy and electrometallurgy. Comparative analysis of microstructures

Санин

Филонов

Юхвид

et al. 2019

Izv. VUZ. Poroshk. Met.

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The influence of different methods used to produce Fe–Cu alloys from immiscible components was studied. Alloys with limited solubility (LS) or pseudoalloys (PA) in a liquid or solid state have long been impossible to obtain with traditional metallurgy methods. This is why developing low-cost and simple technologies to produce such alloys and materials based on them with a possibility to set the required level of physical and mechanical properties is still a relevant problem. This study uses energy-efficient SHS metallurgy method to produce a pseudoalloy with a composition, wt.%: 70Cu–30Fe from oxide materials for the first time. This technology offers using chemical energy generated in the reaction of highly exothermic thermit compositions (in a combustion mode) making it a very energy-efficient method for cast material production. Short synthesis time (tens of seconds), and top surface of ingots protected from oxidation with an oxide melt (Al2O3) enables synthesis in atmospheric conditions. Rods with the same composition were obtained using single-stage vacuum induction remelting from pure (impurity-free) Fe and Cu components for comparative structural studies of alloy sample components. It was found that high melting temperatures of the SHS alloy provides higher solubility of Cu in Fe. Then, when crystallized, structural components are released in the form of small dispersed particles throughout the volume and form a hierarchical structure typical for the SHS alloy only. 70Cu–30Fe alloys produced in a combustion mode (SHS) have a homogeneous structure with structural components distributed uniformly throughout the sample volume, which can be of great practical interest, in particular, for making isotropic and anisotropic hard-magnetic materials with high magnetic energy.

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Permanent magnet properties of in-situ formed Cu–Fe multifilamentary compositesa)

Cited by 4 publications

References 15 publications

Structural investigation of 70Cu/30Fe based cast alloy obtained by combined use of centrifugal casting-SHS process and forging

Structural investigation of 70Cu/30Fe based cast alloy obtained by combined use of centrifugal casting-SHS process and forging

Ferromagnetic multifilamentary Fe and Ni wires with high coercive fields produced by powder metallurgy processing

Рroduction of 70%Cu–30%Fe alloy by SHS metallurgy and electrometallurgy. Comparative analysis of microstructures

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