Influence of Cooling Condition of Casted Strips on Magnetic Properties of Nd–Fe–B Sintered Magnets

Hwaebong Jung, Sumin Kim, Hongjae Moon, Yoon S. Oh, Young Joo Lee, Hyun Sook Lee, Wooyoung Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigated the additional (secondary) cooling effect of casted strips on the magnetic properties of Nd–Fe–B sintered magnets. The Nd–Fe–B sintered magnets were fabricated with the casted strips prepared without and with additional cooling. Additional cooling was achieved by blowing Ar gas at various pressures (0.1, 0.3, and 0.6 MPa) on the free-side surface of the strips during the strip-casting process. The higher magnetic properties of Hc, Br, and (BH)max of the final Nd–Fe–B sintered magnets were obtained for 0.1 MPa rather than for 0.0 MPa. The best microstructure of the columnar grains in the casted strips was produced with the aid of a lower pressure of gas on the free-side surface. It was found that the microstructure of the strips affects the distribution of grains grown in the sintered magnets. This report demonstrates that the improved magnetic performance of Nd–Fe–B sintered magnets was achieved via additional gas cooling.

Original languageEnglish
Pages (from-to)1422-1431
Number of pages10
JournalMetals and Materials International
Volume24
Issue number6
DOIs
Publication statusPublished - 2018 Nov 1

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Magnets
strip
Magnetic properties
magnets
magnetic properties
Cooling
cooling
Gases
Microstructure
gas cooling
Blow molding
microstructure
blowing
Casting
gases
low pressure

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Jung, Hwaebong ; Kim, Sumin ; Moon, Hongjae ; Oh, Yoon S. ; Lee, Young Joo ; Lee, Hyun Sook ; Lee, Wooyoung. / Influence of Cooling Condition of Casted Strips on Magnetic Properties of Nd–Fe–B Sintered Magnets. In: Metals and Materials International. 2018 ; Vol. 24, No. 6. pp. 1422-1431.
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Influence of Cooling Condition of Casted Strips on Magnetic Properties of Nd–Fe–B Sintered Magnets. / Jung, Hwaebong; Kim, Sumin; Moon, Hongjae; Oh, Yoon S.; Lee, Young Joo; Lee, Hyun Sook; Lee, Wooyoung.

In: Metals and Materials International, Vol. 24, No. 6, 01.11.2018, p. 1422-1431.

Research output: Contribution to journalArticle

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