Title :
Microstructure and magnetic properties of SmCo-based nanocrystalline alloys doped with Cr3C2
Author_Institution :
State key Lab. for Powder Metall., Central South Univ., Changsha, China
Abstract :
In this work, the grain refinement behavior, microstructure and magnetic properties of Sm-Co-Cr-C nanocrystalline alloys by TEM and HAADF-STEM were reported. Results showed that the addition of Cr and C leads to the formation of <;0001> texture in SmCo5 alloy melt-spun at relatively high wheel speed of 50 m/s. SmCo7-x(Cr3C2)x (x = 0-0.25) and SmCo4.8(Cr3C2)0.2 ingots were prepared by arc melting under argon. Melt-spun ribbons were produced from the ingots with wheel speeds of 20, 30, 40, and 50 m/s. The crystal structure of the sample was identified by XRD. The microstructural study and quantitative chemical analyses were carried out with the TEM, STEM and X-EDS. Hard magnetic properties were measured by VSM with a maximum field of 23 kOe.
Keywords :
X-ray chemical analysis; X-ray diffraction; chromium alloys; cobalt alloys; crystal structure; grain refinement; ingots; melt processing; nanomagnetics; permanent magnets; samarium alloys; scanning-transmission electron microscopy; transmission electron microscopy; HAADF-STEM; Sm-Co-Cr-C nanocrystalline alloys; SmCo4.8(Cr3C2)0.2; SmCo7-x(Cr3C2)x; TEM; VSM; X-EDS; XRD; arc melting; crystal structure; grain refinement behavior; hard magnetic properties; ingots; melt-spun ribbons; microstructure; quantitative chemical analyses; Diffraction; Grain boundaries; Magnetic anisotropy; Magnetic properties; Metals; Microstructure; Wheels;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157026
