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Microstructure Evolution in a Cast and Homogenized Nd-Fe-B-Cu Alloy: Experimental Study and Thermodynamic Calculations.
- Source :
- JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Sep2024, Vol. 76 Issue 9, p5324-5331, 8p
- Publication Year :
- 2024
-
Abstract
- A commercial grade Nd<subscript>15.5</subscript>Fe<subscript>78</subscript>B<subscript>5</subscript>Cu<subscript>1.5</subscript> alloy was prepared through the melting-casting route. The as-cast (AC) alloy was characterized by X-ray diffraction (XRD) and scanning electron microscopy techniques. XRD and energy-dispersive spectroscopy analyses revealed the presence of Nd<subscript>2</subscript>Fe<subscript>14</subscript>B, Nd<subscript>2</subscript>Fe<subscript>17</subscript>, Nd-rich phase (Nd/NdCu eutectic), and α-Fe phases in the AC specimen. Retainment of α-Fe in the AC microstructure makes a core-shell type microstructure in this condition. Thermodynamic predictions based on the non-equilibrium (Scheil-Gulliver) solidification calculations validate the retainment of both α-Fe and Nd<subscript>2</subscript>Fe<subscript>17</subscript> phases in the AC microstructure. A homogenization treatment has been conducted at 1373 K for 2 h, which effectively results in a substantial reduction in the phase fraction of remnant α-Fe. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10474838
- Volume :
- 76
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- JOM: The Journal of The Minerals, Metals & Materials Society (TMS)
- Publication Type :
- Academic Journal
- Accession number :
- 179087920
- Full Text :
- https://doi.org/10.1007/s11837-024-06726-9