Characterization and microwave absorbing properties of Nd-Fe-Ti intermetallic compounds derived from Nd-Fe-B sintered magnet scraps

Takashi Horikawa; Kouji Miura; Masahiro Itoh; Ken Ichi Machida

doi:10.1109/TMAG.2005.848784

Characterization and microwave absorbing properties of Nd-Fe-Ti intermetallic compounds derived from Nd-Fe-B sintered magnet scraps

Takashi Horikawa, Kouji Miura, Masahiro Itoh, Ken Ichi Machida

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Nd-Fe-Ti intermetallic compounds were prepared from rare earth sintered magnet scrap powders (Nd₂Fe₁₄B sludge) and Ti by arc-melting and solidification processes. The resulting alloy ingots were ground into fine powders and some of them were heated at 100°C-250°C for 1-12 h in air. The epoxy resin composites with 83 wt% of these powders showed good microwave absorption properties at gigahertz range, and the maximum absorption peak of -39.4 dB was observed at 12.3 GHz after heating at 250°C for 3 h in air. Compared to Fe-Ti intermetallic compound powders prepared from fresh metals of Fe and Ti, the sludge-derived Nd-Fe-Ti powders showed higher oxidation resistivity due to the preferential oxidation of Nd content

Original language	English
Pages (from-to)	2064-2070
Number of pages	7
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2005.848784
Publication status	Published - 2005 Jun
Externally published	Yes

Keywords

Fe-based intel-metallic compound
Microwave absorption
Nd-Fe-B sintered magnet scrap
Oxidation effect
Sludge

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2005.848784

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title = "Characterization and microwave absorbing properties of Nd-Fe-Ti intermetallic compounds derived from Nd-Fe-B sintered magnet scraps",

abstract = "Nd-Fe-Ti intermetallic compounds were prepared from rare earth sintered magnet scrap powders (Nd2Fe14B sludge) and Ti by arc-melting and solidification processes. The resulting alloy ingots were ground into fine powders and some of them were heated at 100°C-250°C for 1-12 h in air. The epoxy resin composites with 83 wt% of these powders showed good microwave absorption properties at gigahertz range, and the maximum absorption peak of -39.4 dB was observed at 12.3 GHz after heating at 250°C for 3 h in air. Compared to Fe-Ti intermetallic compound powders prepared from fresh metals of Fe and Ti, the sludge-derived Nd-Fe-Ti powders showed higher oxidation resistivity due to the preferential oxidation of Nd content",

keywords = "Fe-based intel-metallic compound, Microwave absorption, Nd-Fe-B sintered magnet scrap, Oxidation effect, Sludge",

author = "Takashi Horikawa and Kouji Miura and Masahiro Itoh and Machida, {Ken Ichi}",

note = "Funding Information: This work was supported by Grant-in-Aid for Scientific Research No. 15 205 025 from the Ministry of Education, Science, Sports, and Culture of Japan. The authors thank Prof. Y. Hinatsu and Dr. M. Wakeshima for the measurements of the magnetic properties.",

year = "2005",

month = jun,

doi = "10.1109/TMAG.2005.848784",

language = "English",

volume = "41",

pages = "2064--2070",

journal = "IEEE Transactions on Magnetics",

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AU - Horikawa, Takashi

AU - Miura, Kouji

AU - Itoh, Masahiro

AU - Machida, Ken Ichi

N1 - Funding Information: This work was supported by Grant-in-Aid for Scientific Research No. 15 205 025 from the Ministry of Education, Science, Sports, and Culture of Japan. The authors thank Prof. Y. Hinatsu and Dr. M. Wakeshima for the measurements of the magnetic properties.

PY - 2005/6

Y1 - 2005/6

N2 - Nd-Fe-Ti intermetallic compounds were prepared from rare earth sintered magnet scrap powders (Nd2Fe14B sludge) and Ti by arc-melting and solidification processes. The resulting alloy ingots were ground into fine powders and some of them were heated at 100°C-250°C for 1-12 h in air. The epoxy resin composites with 83 wt% of these powders showed good microwave absorption properties at gigahertz range, and the maximum absorption peak of -39.4 dB was observed at 12.3 GHz after heating at 250°C for 3 h in air. Compared to Fe-Ti intermetallic compound powders prepared from fresh metals of Fe and Ti, the sludge-derived Nd-Fe-Ti powders showed higher oxidation resistivity due to the preferential oxidation of Nd content

AB - Nd-Fe-Ti intermetallic compounds were prepared from rare earth sintered magnet scrap powders (Nd2Fe14B sludge) and Ti by arc-melting and solidification processes. The resulting alloy ingots were ground into fine powders and some of them were heated at 100°C-250°C for 1-12 h in air. The epoxy resin composites with 83 wt% of these powders showed good microwave absorption properties at gigahertz range, and the maximum absorption peak of -39.4 dB was observed at 12.3 GHz after heating at 250°C for 3 h in air. Compared to Fe-Ti intermetallic compound powders prepared from fresh metals of Fe and Ti, the sludge-derived Nd-Fe-Ti powders showed higher oxidation resistivity due to the preferential oxidation of Nd content

KW - Fe-based intel-metallic compound

KW - Microwave absorption

KW - Nd-Fe-B sintered magnet scrap

KW - Oxidation effect

KW - Sludge

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Characterization and microwave absorbing properties of Nd-Fe-Ti intermetallic compounds derived from Nd-Fe-B sintered magnet scraps

Abstract

Keywords

ASJC Scopus subject areas

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