TY - JOUR
T1 - Synthesis of Fe-Pt-B nanocomposite magnets with high coercivity by rapid solidification
AU - Zhang, Wei
AU - Yubuta, Kunio
AU - Sharma, Parmanand
AU - Inoue, Akihisa
N1 - Funding Information:
This work was financially supported by Core Research in Environmental Science and Technology (CREST), Japan Science and Technology Agency, and Research and Development Project on Advanced Metallic Glasses, Inorganic Materials and Joining Technology from the Ministry of Education, Science, Sports, and Culture of Japan.
PY - 2006
Y1 - 2006
N2 - The L 10 FePt Fe2 B -type nanocomposite magnets with high coercivity have been obtained in the Febal. Pt30-32 B18-20 alloys directly by the melt spinning technique. The as-spun ribbons showed good hard magnetic properties. The remanence, coercivity, and energy product for the Fe52 Pt30 B18 alloy melt spun at a wheel circumferential speed (Vs) of 35 ms were 0.70 T, 783 kAm, and 88.0 kJ m3, respectively. The spring-back minor M-H loops were also observed for the alloy. The melt-spun alloy has a nanocomposite structure, consisting of L 10 FePt and Fe2 B phases with the average grain sizes of ∼40 nm. The good hard magnetic properties are interpreted in terms of exchange magnetic coupling among the nanoscale hard L 10 FePt and soft Fe2 B magnetic phases. The present easy and single step process of forming the nanocomposite magnet having high coercivity is encouraging for the future development of Fe-Pt-based hard magnetic alloys.
AB - The L 10 FePt Fe2 B -type nanocomposite magnets with high coercivity have been obtained in the Febal. Pt30-32 B18-20 alloys directly by the melt spinning technique. The as-spun ribbons showed good hard magnetic properties. The remanence, coercivity, and energy product for the Fe52 Pt30 B18 alloy melt spun at a wheel circumferential speed (Vs) of 35 ms were 0.70 T, 783 kAm, and 88.0 kJ m3, respectively. The spring-back minor M-H loops were also observed for the alloy. The melt-spun alloy has a nanocomposite structure, consisting of L 10 FePt and Fe2 B phases with the average grain sizes of ∼40 nm. The good hard magnetic properties are interpreted in terms of exchange magnetic coupling among the nanoscale hard L 10 FePt and soft Fe2 B magnetic phases. The present easy and single step process of forming the nanocomposite magnet having high coercivity is encouraging for the future development of Fe-Pt-based hard magnetic alloys.
UR - http://www.scopus.com/inward/record.url?scp=33646755372&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33646755372&partnerID=8YFLogxK
U2 - 10.1063/1.2172547
DO - 10.1063/1.2172547
M3 - Article
AN - SCOPUS:33646755372
VL - 99
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 8
M1 - 08E914
ER -