Characterization of nanostructured Fe–Co–Si powder alloy

Khajepour, M.; Sharafi, S.

doi:10.1016/j.powtec.2012.07.051

Cited by 30 publications

(7 citation statements)

References 28 publications

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“…These materials are fabricated through various methods. 1,2 Cr-Cu alloys have wide application potential in the automobile, electrical and electronic industries due to their high electrical conductivity and high mechanical strength. 3,4 Currently, the properties of Cr-Cu alloys are generally improved by adopting grain refinement and solid-solution strengthening of Cr phase.…”

Section: Introductionmentioning

confidence: 99%

Cr50Cu50 alloys produced from submicrometre structured powders through hot pressing at different pressures

et al. 2016

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In this study, two different compositions of submicrometre copper and chromium powders were mixed and the Cr50Cu50 alloys were fabricated via the powder metallurgy technique. The research imposed various hot pressing pressures, while the temperature was maintained at 1050°C for 1 h, respectively. The experimental results showed that the Saint Venant's effect obviously appeared in 1050°C, 48 MPa, 1 h hot pressing Cr50Cu50 alloys, which led to differences in the surface and internal hardness of the specimens. As a result, the optimal parameters of hot pressing of Cr50Cu50 alloys were 1050°C, 36 MPa for 1 h possessing the highest transverse rupture strength value (921.69 MPa). Moreover, the surface hardness increased to HV 0.2 221.78 (HRB 95.4), the relative density reached 97.15% and apparent porosity decreased to 0.10%, respectively. Furthermore, the resistivity decreased to 5.28 × 10 −6 Ω cm, and ICAS was enhanced to 32.65% after the optimal procedure.

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Section: Introductionmentioning

confidence: 99%

Cr50Cu50 alloys produced from submicrometre structured powders through hot pressing at different pressures

et al. 2016

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“…Presently, the use of nano and submicron-structured powders for producing materials with finer microstructures represents one of the most active fields of research in the alloy industry, because the nano and submicron-structured alloys possess more excellent mechanical properties such as high hardness, strength and toughness. 1,2) Since Cr-Cu alloys have high strength, good electrical conductivity, excellent arc erosion and welding resistance, due to the exclusive combination of properties of the two constituents, they are employed as the best contact materials for medium-voltage, high-vacuum interrupters. Most of the production methods of this component initiates with a powder mixture of Cr and Cu.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Submicron Powder Fabricated Cr50Cu50 Alloys Using Various Vacuum Hot-Press Sintering Temperatures

et al. 2015

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The aim of this study is to explore the two different constituents of submicron-sized copper and chromium powders as Cr50Cu50 alloy materials. The research imposes various vacuum hot-press sintering temperatures (950°C, 1000°C, 1050°C and 1100°C) and pressures maintained at 12 MPa for 1 h, respectively. The experimental results show that the optimal parameters for the hot-press sintering of Cr50Cu50 alloys are 1050°C at 12 MPa for 1 h. The relative density reaches 96.09% and the apparent porosity decreases to 0.12%. Moreover, the hardness and TRS (transverse rupture strength) values increase to HV 0.2 198.82 (HRB 91.07) and 910.04 MPa, respectively. The results of this study also indicate that the closed pores are effectively reduced and the mechanical properties of the Cr50Cu50 alloys are dramatically improved by increasing the temperature of the hot-press sintering process. Moreover, the optimal hot-press sintered Cr50Cu50 alloys also possess a dense microstructure and good electrical conductivity. The resistivity is decreased to 5.89 © 10 ¹6 ³·cm and the ICAS is enhanced to 29.27%.

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“…Here, the annealing process leads to the development of a bimodal grain size characteristic, where coarse grains with average grain size around 200 to 600 µm are surrounded by finer grains (around 2 µm in size). By tuning the printing parameters or mixing additives into the iron alloy starting powder, it is possible to 3D print FeCo cores with even further attractive properties [24,25]. These explorations in AM of FeCo alloys show promise in overcoming the workability issues associated with the conventional mechanical processing of FeCo cores, while achieving DC magnetic characteristics close to commercial products.…”

Section: Iron-cobalt (Feco)mentioning

confidence: 99%

Additive Manufacturing and Topology Optimization of Magnetic Materials for Electrical Machines—A Review

2021

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Additive manufacturing has many advantages over traditional manufacturing methods and has been increasingly used in medical, aerospace, and automotive applications. The flexibility of additive manufacturing technologies to fabricate complex geometries from copper, polymer, and ferrous materials presents unique opportunities for new design concepts and improved machine power density without significantly increasing production and prototyping cost. Topology optimization investigates the optimal distribution of single or multiple materials within a defined design space, and can lead to unique geometries not realizable with conventional optimization techniques. As an enabling technology, additive manufacturing provides an opportunity for machine designers to overcome the current manufacturing limitation that inhibit adoption of topology optimization. Successful integration of additive manufacturing and topology optimization for fabricating magnetic components for electrical machines can enable new tools for electrical machine designers. This article presents a comprehensive review of the latest achievements in the application of additive manufacturing, topology optimization, and their integration for electrical machines and their magnetic components.

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Characterization of nanostructured Fe–Co–Si powder alloy

Cited by 30 publications

References 28 publications

Cr50Cu50 alloys produced from submicrometre structured powders through hot pressing at different pressures

Cr50Cu50 alloys produced from submicrometre structured powders through hot pressing at different pressures

Investigation of Submicron Powder Fabricated Cr50Cu50 Alloys Using Various Vacuum Hot-Press Sintering Temperatures

Additive Manufacturing and Topology Optimization of Magnetic Materials for Electrical Machines—A Review

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