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Title: Binder jet additive manufacturing method to fabricate near net shape crack-free highly dense Fe-6.5 wt.% Si soft magnets

Abstract

High silicon (Si) electrical steel has the potential for efficient use in applications such as electrical motors and generators with cost-effective in processing, but it is difficult to manufacture. Increasing the Si content beyond 3 wt.% improves magnetic and electrical properties, with 6.5 wt.% being achievable. The main goal of this research is to design, develop, and implement a scalable additive manufacturing process to fabricate Fe with 6.5 wt.% Si (Fe–6Si) steel with high magnetic permeability, high electrical resistivity, low coercivity, and low residual induction that other methods cannot achieve because of manufacturing limitations. Binder jet additive manufacturing was used to deposit near net shape components that were subsequently sintered via solid-state sintering to achieve near full densification. Here, it is shown that the use of solid-state sintering mitigates cracking since no rapid solidification occurs unlike fusion-based additive technologies. The Fe–6Si samples demonstrated an ultimate tensile strength of 434 MPa, electrical resistivity of 98 μΩ cm, and saturation magnetization of 1.83 T with low coercivity and high permeability. The results strongly supports to replace the only available 0.1 mm thick chemical vapor deposition (CVD) produced Si steel using the cost effective AM method with good mechanical and magnetic properties formore » motor applications.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1574542
Alternate Identifier(s):
OSTI ID: 1607076
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Heliyon
Additional Journal Information:
Journal Name: Heliyon Journal Volume: 5 Journal Issue: 11; Journal ID: ISSN 2405-8440
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; Electromagnetism; Soft magnetic alloy; Fe–6Si; Binder jet additive manufacturing; DC and AC magnetic properties; Stators

Citation Formats

Cramer, Corson L., Nandwana, Peeyush, Yan, Jiaqiang, Evans, Samuel F., Elliott, Amy M., Chinnasamy, Chins, and Paranthaman, M. Parans. Binder jet additive manufacturing method to fabricate near net shape crack-free highly dense Fe-6.5 wt.% Si soft magnets. United Kingdom: N. p., 2019. Web. doi:10.1016/j.heliyon.2019.e02804.
Cramer, Corson L., Nandwana, Peeyush, Yan, Jiaqiang, Evans, Samuel F., Elliott, Amy M., Chinnasamy, Chins, & Paranthaman, M. Parans. Binder jet additive manufacturing method to fabricate near net shape crack-free highly dense Fe-6.5 wt.% Si soft magnets. United Kingdom. https://doi.org/10.1016/j.heliyon.2019.e02804
Cramer, Corson L., Nandwana, Peeyush, Yan, Jiaqiang, Evans, Samuel F., Elliott, Amy M., Chinnasamy, Chins, and Paranthaman, M. Parans. Tue . "Binder jet additive manufacturing method to fabricate near net shape crack-free highly dense Fe-6.5 wt.% Si soft magnets". United Kingdom. https://doi.org/10.1016/j.heliyon.2019.e02804.
@article{osti_1574542,
title = {Binder jet additive manufacturing method to fabricate near net shape crack-free highly dense Fe-6.5 wt.% Si soft magnets},
author = {Cramer, Corson L. and Nandwana, Peeyush and Yan, Jiaqiang and Evans, Samuel F. and Elliott, Amy M. and Chinnasamy, Chins and Paranthaman, M. Parans},
abstractNote = {High silicon (Si) electrical steel has the potential for efficient use in applications such as electrical motors and generators with cost-effective in processing, but it is difficult to manufacture. Increasing the Si content beyond 3 wt.% improves magnetic and electrical properties, with 6.5 wt.% being achievable. The main goal of this research is to design, develop, and implement a scalable additive manufacturing process to fabricate Fe with 6.5 wt.% Si (Fe–6Si) steel with high magnetic permeability, high electrical resistivity, low coercivity, and low residual induction that other methods cannot achieve because of manufacturing limitations. Binder jet additive manufacturing was used to deposit near net shape components that were subsequently sintered via solid-state sintering to achieve near full densification. Here, it is shown that the use of solid-state sintering mitigates cracking since no rapid solidification occurs unlike fusion-based additive technologies. The Fe–6Si samples demonstrated an ultimate tensile strength of 434 MPa, electrical resistivity of 98 μΩ cm, and saturation magnetization of 1.83 T with low coercivity and high permeability. The results strongly supports to replace the only available 0.1 mm thick chemical vapor deposition (CVD) produced Si steel using the cost effective AM method with good mechanical and magnetic properties for motor applications.},
doi = {10.1016/j.heliyon.2019.e02804},
journal = {Heliyon},
number = 11,
volume = 5,
place = {United Kingdom},
year = {2019},
month = {11}
}

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