Amorphous formation and magnetic properties of Nd-Fe-Co-Al alloys by gas flow type levitation process

Shuji Azumo, Katsuhisa Nagayama

研究成果: Article

5 引用 (Scopus)

抄録

It is reported that Nd-Fe-Co-Al amorphous alloys have high bulk amorphous formation ability and high coercivity by rapid solidification method. We have examined the undercooling solidification, bulk amorphous formation and high coercivity appearance by using containerless process. In this study, we investigated the undercooling, bulk amorphous formation and magnetic properties for Nd-Fe-Co-Al alloys which are levitated and solidified by using the gas jet flow and high cooling type electromagnetic levitation system. Therefore, the high undercooling degree was 66-152 K and the samples formed amorphous phase. The bulk samples, Φ6 mm sphere, solidified at the cooling rate, about 100 K/s. In addition, the coercivity for Nd65Fe10Co 15Al10 sample with bulk amorphous phase, 3.7kOe, was the highest value in all samples. Also, the thermal stability for Nd 65Fe10Co15Al10 sample was carried out by isothermal annealing experiments. The origin of high coercivity may be related to the amorphous phase.

元の言語English
ページ(範囲)2842-2845
ページ数4
ジャーナルMaterials Transactions
47
発行部数11
DOI
出版物ステータスPublished - 2006 11

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levitation
gas flow
Flow of gases
Magnetic properties
coercivity
magnetic properties
Coercive force
supercooling
Undercooling
cooling
magnetic suspension
rapid solidification
gas jets
jet flow
Cooling
Isothermal annealing
Rapid solidification
solidification
Amorphous alloys
thermal stability

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

これを引用

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title = "Amorphous formation and magnetic properties of Nd-Fe-Co-Al alloys by gas flow type levitation process",
abstract = "It is reported that Nd-Fe-Co-Al amorphous alloys have high bulk amorphous formation ability and high coercivity by rapid solidification method. We have examined the undercooling solidification, bulk amorphous formation and high coercivity appearance by using containerless process. In this study, we investigated the undercooling, bulk amorphous formation and magnetic properties for Nd-Fe-Co-Al alloys which are levitated and solidified by using the gas jet flow and high cooling type electromagnetic levitation system. Therefore, the high undercooling degree was 66-152 K and the samples formed amorphous phase. The bulk samples, Φ6 mm sphere, solidified at the cooling rate, about 100 K/s. In addition, the coercivity for Nd65Fe10Co 15Al10 sample with bulk amorphous phase, 3.7kOe, was the highest value in all samples. Also, the thermal stability for Nd 65Fe10Co15Al10 sample was carried out by isothermal annealing experiments. The origin of high coercivity may be related to the amorphous phase.",
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AU - Azumo, Shuji

AU - Nagayama, Katsuhisa

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Y1 - 2006/11

N2 - It is reported that Nd-Fe-Co-Al amorphous alloys have high bulk amorphous formation ability and high coercivity by rapid solidification method. We have examined the undercooling solidification, bulk amorphous formation and high coercivity appearance by using containerless process. In this study, we investigated the undercooling, bulk amorphous formation and magnetic properties for Nd-Fe-Co-Al alloys which are levitated and solidified by using the gas jet flow and high cooling type electromagnetic levitation system. Therefore, the high undercooling degree was 66-152 K and the samples formed amorphous phase. The bulk samples, Φ6 mm sphere, solidified at the cooling rate, about 100 K/s. In addition, the coercivity for Nd65Fe10Co 15Al10 sample with bulk amorphous phase, 3.7kOe, was the highest value in all samples. Also, the thermal stability for Nd 65Fe10Co15Al10 sample was carried out by isothermal annealing experiments. The origin of high coercivity may be related to the amorphous phase.

AB - It is reported that Nd-Fe-Co-Al amorphous alloys have high bulk amorphous formation ability and high coercivity by rapid solidification method. We have examined the undercooling solidification, bulk amorphous formation and high coercivity appearance by using containerless process. In this study, we investigated the undercooling, bulk amorphous formation and magnetic properties for Nd-Fe-Co-Al alloys which are levitated and solidified by using the gas jet flow and high cooling type electromagnetic levitation system. Therefore, the high undercooling degree was 66-152 K and the samples formed amorphous phase. The bulk samples, Φ6 mm sphere, solidified at the cooling rate, about 100 K/s. In addition, the coercivity for Nd65Fe10Co 15Al10 sample with bulk amorphous phase, 3.7kOe, was the highest value in all samples. Also, the thermal stability for Nd 65Fe10Co15Al10 sample was carried out by isothermal annealing experiments. The origin of high coercivity may be related to the amorphous phase.

KW - Bulk amorphous phase

KW - Containerless process

KW - Gas jet flow type levitation

KW - High coercivity

KW - Neodymium-iron-cobalt- aluminum alloys

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