TY - JOUR
T1 - Effect of TiC addition on microstructure and magnetic properties for MRE 2 (Fe,Co) 14B melt-spun ribbons (MRE=Nd+Y+Dy)
AU - Tang, W.
AU - Wu, Y. Q.
AU - Dennis, K. W.
AU - Kramer, M. J.
AU - Anderson, I. E.
AU - McCallum, R. W.
PY - 2006
Y1 - 2006
N2 - Effects of a TiC addition on microstructure and magnetic properties in [MRE2.2 Fe14 B] (100-2x) 17.2 + Tix Cx (MRE=Nd+Y+Dy,x=1-5) ribbons, melt spun at a wheel speed of 16 ms, were systematically studied. X-ray diffraction and differential thermal analysis data revealed that the addition of TiC improves the glass formability in the mixed rare earth alloys without Co, resulting in partially amorphous alloys. TEM observations showed that the average grain size in the as spun samples decreases from 200 to 20 nm with increasing x from 1 to 5, confirming that the addition of TiC can significantly improve microstructure. For an optimized [MRE2 (Fe,Co)14 B] (100-2x) 17.2 + Tix Cx sample with x=2, spun at 25 ms and annealed at 750 °C for 15 min, the room-temperature magnetic properties of Hcj =11.8 kOe, Mr =7.2 kGs, and (BH)max =11.3 MGOe were obtained. Temperature coefficients for Mr and Hcj of -0.06 and -0.37%°C, respectively, also were measured in the temperature range of 27-100 °C. The new magnet alloy exhibits more uniform magnetic properties and a usable energy product to nearly 300 °C.
AB - Effects of a TiC addition on microstructure and magnetic properties in [MRE2.2 Fe14 B] (100-2x) 17.2 + Tix Cx (MRE=Nd+Y+Dy,x=1-5) ribbons, melt spun at a wheel speed of 16 ms, were systematically studied. X-ray diffraction and differential thermal analysis data revealed that the addition of TiC improves the glass formability in the mixed rare earth alloys without Co, resulting in partially amorphous alloys. TEM observations showed that the average grain size in the as spun samples decreases from 200 to 20 nm with increasing x from 1 to 5, confirming that the addition of TiC can significantly improve microstructure. For an optimized [MRE2 (Fe,Co)14 B] (100-2x) 17.2 + Tix Cx sample with x=2, spun at 25 ms and annealed at 750 °C for 15 min, the room-temperature magnetic properties of Hcj =11.8 kOe, Mr =7.2 kGs, and (BH)max =11.3 MGOe were obtained. Temperature coefficients for Mr and Hcj of -0.06 and -0.37%°C, respectively, also were measured in the temperature range of 27-100 °C. The new magnet alloy exhibits more uniform magnetic properties and a usable energy product to nearly 300 °C.
UR - http://www.scopus.com/inward/record.url?scp=33646729448&partnerID=8YFLogxK
U2 - 10.1063/1.2165109
DO - 10.1063/1.2165109
M3 - Article
AN - SCOPUS:33646729448
SN - 0021-8979
VL - 99
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 8
M1 - 08B510
ER -