Bulk amorphous formation and magnetic properties of Nd-Fe-Co-Al alloys by the new gas jet flow type levitating process

Shuji Azumo, Seishi Utsuno, Katsuhisa Nagayama

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The amorphous formation ability and the magnetic properties of Nd 60Fe 30-xCo xAl 10 (x = 10, 15, 20 or 30) alloys in the containerless process were studied by the new gas jet flow type levitating process. The gas jet flow type levitating process enables solidification without any container wall by the inert gas jet. The samples were solidified at the cooling rate of around 100 K/s. Then, the undercooling of samples exhibits high values (ΔT = 60-150 K). From X-ray diffraction measurements, the Nd 60Fe3 0-xCo xAl 10 samples exhibit a typical broad diffraction pattern for an amorphous structure. The DTA curves of x = 10, 15 and 20 showed an exothermic peak due to the crystallization. That is, it was revealed that the Nd 60Fe 30-xCo xAl 10 samples formed bulk amorphous. Also, the coercivity is 1.6, 3.3 and 3.6kOe for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 15Co 15Al 10 and Nd 60Fe 10Co 20Al 10, respectively. From the thermomagnetic curves, the Curie temperature is determined to be 463, 482 and 482 K for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 10Co 20Al 10, and Nd 60Fe 10Co 20Al 10, respectively. In the M-H loops and the thermomagnetic curves, this difference between x = 10 ana x = 15, M may depend on tne microstructure.

Original languageEnglish
Pages (from-to)1568-1571
Number of pages4
JournalMaterials Transactions
Volume47
Issue number6
DOIs
Publication statusPublished - 2006 Jun

Fingerprint

gas jets
jet flow
Magnetic properties
Gases
magnetic properties
Noble Gases
Undercooling
curves
Curie temperature
Inert gases
Crystallization
Coercive force
Differential thermal analysis
Diffraction patterns
Containers
Solidification
supercooling
containers
solidification
Cooling

Keywords

  • Bulk amorphous
  • Containerless process
  • High coercivity
  • Metastable phase
  • Nd Fe Co Al

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Bulk amorphous formation and magnetic properties of Nd-Fe-Co-Al alloys by the new gas jet flow type levitating process. / Azumo, Shuji; Utsuno, Seishi; Nagayama, Katsuhisa.

In: Materials Transactions, Vol. 47, No. 6, 06.2006, p. 1568-1571.

Research output: Contribution to journalArticle

@article{82bb8853f00e4ec79d954503b849dd15,
title = "Bulk amorphous formation and magnetic properties of Nd-Fe-Co-Al alloys by the new gas jet flow type levitating process",
abstract = "The amorphous formation ability and the magnetic properties of Nd 60Fe 30-xCo xAl 10 (x = 10, 15, 20 or 30) alloys in the containerless process were studied by the new gas jet flow type levitating process. The gas jet flow type levitating process enables solidification without any container wall by the inert gas jet. The samples were solidified at the cooling rate of around 100 K/s. Then, the undercooling of samples exhibits high values (ΔT = 60-150 K). From X-ray diffraction measurements, the Nd 60Fe3 0-xCo xAl 10 samples exhibit a typical broad diffraction pattern for an amorphous structure. The DTA curves of x = 10, 15 and 20 showed an exothermic peak due to the crystallization. That is, it was revealed that the Nd 60Fe 30-xCo xAl 10 samples formed bulk amorphous. Also, the coercivity is 1.6, 3.3 and 3.6kOe for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 15Co 15Al 10 and Nd 60Fe 10Co 20Al 10, respectively. From the thermomagnetic curves, the Curie temperature is determined to be 463, 482 and 482 K for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 10Co 20Al 10, and Nd 60Fe 10Co 20Al 10, respectively. In the M-H loops and the thermomagnetic curves, this difference between x = 10 ana x = 15, M may depend on tne microstructure.",
keywords = "Bulk amorphous, Containerless process, High coercivity, Metastable phase, Nd Fe Co Al",
author = "Shuji Azumo and Seishi Utsuno and Katsuhisa Nagayama",
year = "2006",
month = "6",
doi = "10.2320/matertrans.47.1568",
language = "English",
volume = "47",
pages = "1568--1571",
journal = "Materials Transactions",
issn = "1345-9678",
publisher = "Japan Institute of Metals (JIM)",
number = "6",

}

TY - JOUR

T1 - Bulk amorphous formation and magnetic properties of Nd-Fe-Co-Al alloys by the new gas jet flow type levitating process

AU - Azumo, Shuji

AU - Utsuno, Seishi

AU - Nagayama, Katsuhisa

PY - 2006/6

Y1 - 2006/6

N2 - The amorphous formation ability and the magnetic properties of Nd 60Fe 30-xCo xAl 10 (x = 10, 15, 20 or 30) alloys in the containerless process were studied by the new gas jet flow type levitating process. The gas jet flow type levitating process enables solidification without any container wall by the inert gas jet. The samples were solidified at the cooling rate of around 100 K/s. Then, the undercooling of samples exhibits high values (ΔT = 60-150 K). From X-ray diffraction measurements, the Nd 60Fe3 0-xCo xAl 10 samples exhibit a typical broad diffraction pattern for an amorphous structure. The DTA curves of x = 10, 15 and 20 showed an exothermic peak due to the crystallization. That is, it was revealed that the Nd 60Fe 30-xCo xAl 10 samples formed bulk amorphous. Also, the coercivity is 1.6, 3.3 and 3.6kOe for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 15Co 15Al 10 and Nd 60Fe 10Co 20Al 10, respectively. From the thermomagnetic curves, the Curie temperature is determined to be 463, 482 and 482 K for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 10Co 20Al 10, and Nd 60Fe 10Co 20Al 10, respectively. In the M-H loops and the thermomagnetic curves, this difference between x = 10 ana x = 15, M may depend on tne microstructure.

AB - The amorphous formation ability and the magnetic properties of Nd 60Fe 30-xCo xAl 10 (x = 10, 15, 20 or 30) alloys in the containerless process were studied by the new gas jet flow type levitating process. The gas jet flow type levitating process enables solidification without any container wall by the inert gas jet. The samples were solidified at the cooling rate of around 100 K/s. Then, the undercooling of samples exhibits high values (ΔT = 60-150 K). From X-ray diffraction measurements, the Nd 60Fe3 0-xCo xAl 10 samples exhibit a typical broad diffraction pattern for an amorphous structure. The DTA curves of x = 10, 15 and 20 showed an exothermic peak due to the crystallization. That is, it was revealed that the Nd 60Fe 30-xCo xAl 10 samples formed bulk amorphous. Also, the coercivity is 1.6, 3.3 and 3.6kOe for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 15Co 15Al 10 and Nd 60Fe 10Co 20Al 10, respectively. From the thermomagnetic curves, the Curie temperature is determined to be 463, 482 and 482 K for the Nd 60Fe 20Co 10Al 10, Nd 60Fe 10Co 20Al 10, and Nd 60Fe 10Co 20Al 10, respectively. In the M-H loops and the thermomagnetic curves, this difference between x = 10 ana x = 15, M may depend on tne microstructure.

KW - Bulk amorphous

KW - Containerless process

KW - High coercivity

KW - Metastable phase

KW - Nd Fe Co Al

UR - http://www.scopus.com/inward/record.url?scp=33746922350&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33746922350&partnerID=8YFLogxK

U2 - 10.2320/matertrans.47.1568

DO - 10.2320/matertrans.47.1568

M3 - Article

AN - SCOPUS:33746922350

VL - 47

SP - 1568

EP - 1571

JO - Materials Transactions

JF - Materials Transactions

SN - 1345-9678

IS - 6

ER -