Cargando…

Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption

Nanocrystalline soft magnetic alloy powders are promising microwave absorbents since they can work at diverse frequencies and are stable in harsh environments. However, when the alloy powders are in austenite phase, they are out of the screen for microwave absorbents due to their paramagnetic nature...

Descripción completa

Detalles Bibliográficos
Autores principales: Fu, Ziwen, Chen, Zhihong, Wang, Rui, Xiao, Hanyan, Wang, Jun, Yang, Hao, Shi, Yueting, Li, Wei, Guan, Jianguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9268570/
https://www.ncbi.nlm.nih.gov/pubmed/35808101
http://dx.doi.org/10.3390/nano12132263
_version_ 1784744017113645056
author Fu, Ziwen
Chen, Zhihong
Wang, Rui
Xiao, Hanyan
Wang, Jun
Yang, Hao
Shi, Yueting
Li, Wei
Guan, Jianguo
author_facet Fu, Ziwen
Chen, Zhihong
Wang, Rui
Xiao, Hanyan
Wang, Jun
Yang, Hao
Shi, Yueting
Li, Wei
Guan, Jianguo
author_sort Fu, Ziwen
collection PubMed
description Nanocrystalline soft magnetic alloy powders are promising microwave absorbents since they can work at diverse frequencies and are stable in harsh environments. However, when the alloy powders are in austenite phase, they are out of the screen for microwave absorbents due to their paramagnetic nature. In this work, we reported a strategy to enable strong microwave absorption in nanocrystalline austenite FeCoCr powders by deformation-thermal co-induced ferromagnetism via attritor ball milling and subsequent heat treatment. Results showed that significant austenite-to-martensite transformation in the FeCoCr powders was achieved during ball milling, along with the increase in shape anisotropy from spherical to flaky. The saturation magnetization followed parabolic kinetics during ball milling and rose from 1.43 to 109.92 emu/g after milling for 4 h, while it exhibited a rapid increase to 181.58 emu/g after subsequent heat treatment at 500 °C. A considerable increase in complex permeability and hence magnetic loss capability was obtained. With appropriate modulation of complex permittivity, the resultant absorbents showed a reflection loss of below −6 dB over 8~18 GHz at thickness of 1 mm and superior stability at 300 °C. Our strategy can broaden the material selection for microwave absorbents by involving Fe-based austenite alloys and simply recover the ferromagnetism of industrial products made without proper control of the crystalline phase.
format Online
Article
Text
id pubmed-9268570
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-92685702022-07-09 Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption Fu, Ziwen Chen, Zhihong Wang, Rui Xiao, Hanyan Wang, Jun Yang, Hao Shi, Yueting Li, Wei Guan, Jianguo Nanomaterials (Basel) Article Nanocrystalline soft magnetic alloy powders are promising microwave absorbents since they can work at diverse frequencies and are stable in harsh environments. However, when the alloy powders are in austenite phase, they are out of the screen for microwave absorbents due to their paramagnetic nature. In this work, we reported a strategy to enable strong microwave absorption in nanocrystalline austenite FeCoCr powders by deformation-thermal co-induced ferromagnetism via attritor ball milling and subsequent heat treatment. Results showed that significant austenite-to-martensite transformation in the FeCoCr powders was achieved during ball milling, along with the increase in shape anisotropy from spherical to flaky. The saturation magnetization followed parabolic kinetics during ball milling and rose from 1.43 to 109.92 emu/g after milling for 4 h, while it exhibited a rapid increase to 181.58 emu/g after subsequent heat treatment at 500 °C. A considerable increase in complex permeability and hence magnetic loss capability was obtained. With appropriate modulation of complex permittivity, the resultant absorbents showed a reflection loss of below −6 dB over 8~18 GHz at thickness of 1 mm and superior stability at 300 °C. Our strategy can broaden the material selection for microwave absorbents by involving Fe-based austenite alloys and simply recover the ferromagnetism of industrial products made without proper control of the crystalline phase. MDPI 2022-06-30 /pmc/articles/PMC9268570/ /pubmed/35808101 http://dx.doi.org/10.3390/nano12132263 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Fu, Ziwen
Chen, Zhihong
Wang, Rui
Xiao, Hanyan
Wang, Jun
Yang, Hao
Shi, Yueting
Li, Wei
Guan, Jianguo
Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption
title Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption
title_full Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption
title_fullStr Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption
title_full_unstemmed Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption
title_short Deformation-Thermal Co-Induced Ferromagnetism of Austenite Nanocrystalline FeCoCr Powders for Strong Microwave Absorption
title_sort deformation-thermal co-induced ferromagnetism of austenite nanocrystalline fecocr powders for strong microwave absorption
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9268570/
https://www.ncbi.nlm.nih.gov/pubmed/35808101
http://dx.doi.org/10.3390/nano12132263
work_keys_str_mv AT fuziwen deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT chenzhihong deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT wangrui deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT xiaohanyan deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT wangjun deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT yanghao deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT shiyueting deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT liwei deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption
AT guanjianguo deformationthermalcoinducedferromagnetismofaustenitenanocrystallinefecocrpowdersforstrongmicrowaveabsorption