Nd-Fe-B/Sm-M/Nd-M (M = Fe, Co, Ti, Cu, Zr) hybrid magnets with improved thermal stability

The authors attempt to optimize for performance the composition of R 2Fe14B/Fe3B-based hard nanocomposite alloys with R = neodymium (Nd) and terbium (Tb) by optimizing phases in order to develop hysteresis parameters such as maximum magnetization, coercivity and maximum energy product through variation in composition and heat treatment. The samples were prepared from arc-melted ingots of different compositions. The crystallization temperatures were obtained from the differential scanning calorimeter traces of the samples with the composition Nd4−x Tb x Fe71Co5Cu0·5Nb1B18·5 (x = 0·0, 0·2, 0·4, 0·6, 0·8 and 1·0). Depending on their crystallization temperatures, the samples were annealed at 600, 625, 650, 675 and 700°C for 10 min. Amorphosity and crystallization behavior were studied by X-ray diffraction using copper (Cu) Kα radiation (1·5418 Å). The Mössbauer spectra of all the samples were recorded at room temperature by using iron-57 (57Fe) Mössbauer spectrometry in transmission geometry with a constant-acceleration spectrometer. Magnetic properties were determined by a vibrating-sample magnetometer in the as-cast and annealed conditions. Although the highest values of coercivity and remanent ratio were found to be 4·18 kOe and 0·72, respectively, for the sample of composition Nd3Tb1Fe71Co5Cu0·5Nb1B18·5 annealed at 650°C with a higher concentration of terbium, the highest maximum energy product was determined to be 12·67 MGOe for the sample of Nd3·8Tb0·2Fe71Co5Cu0·5Nb1B18·5.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Nd-Fe-B/Sm-M/Nd-M (M = Fe, Co, Ti, Cu, Zr) hybrid magnets with improved thermal stability

Cited by 3 publications

References 27 publications

Powder metallurgy parameters for the optimization of nano-hybrid neodymium iron boron-based composite

Powder metallurgy parameters for the optimization of nano-hybrid neodymium iron boron-based composite

Effect of doping Al-Cu-Fe alloy on the microstructure and magnetic properties of annealed Nd-Fe-Co-B ribbons

Characterization of Nd(Tb)–Fe–B-based exchange-spring nanocomposite magnets

Contact Info

Product

Resources

About