Abstract
The phase evolution, thermal stability, structure and magnetic properties of the melt-spun Fe70-xPtxB30 (x = 0-20) alloys have been investigated. Addition of small amounts of Pt to the Fe70B30 alloy increases the amorphous-forming ability, leading to the formation of an amorphous phase in the alloys with x = 5 and 10. Further increase in Pt content results in the formation of the fcc-FePt + Fe2B or fcc-FePt + L10-FePt + Fe2B crystalline phases. After appropriate annealing, the homogeneous nano-sized structure consisting of hard L10-FePt and soft Fe2B magnetic phases were formed for the alloys with x = 10-20, which exhibited good hard magnetic properties. As the Pt content increase, the coercivity (iHc) of the L10-FePt/Fe2B nanocomposite alloys significantly increased, while the remanence (Br) decreased. The Br, reduced remanence (Mr/Ms), iHc, and energy product (BH)max of the alloys are in the range of 0.81-1.20 T, 0.76-0.84, 173.2-523.1 kA/m, and 64.0-88.3 kJ/m3, respectively.
Original language | English |
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Pages (from-to) | S252-S255 |
Journal | Journal of Alloys and Compounds |
Volume | 615 |
Issue number | S1 |
DOIs | |
Publication status | Published - 2015 Jan 15 |
Keywords
- Amorphous-forming ability
- Annealing
- Hard magnetic materials
- Melt spinning
- Nanocomposite structure
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry