Hard-magnetic melt-spun R–Fe–B alloys on the base of light rare-earth metals (R=La, Nd)

• Дата: 2013
• Автори: Bovda, O.M., Bovda, V.O., Onischenko, L.V., Tortika, O.S., Kostin, O.O., Ravlik, A.G., Avramenko, B.A., Aseev, A.S., Baumer, V.M.
• Формат: Стаття
• Мова: English
• Опубліковано: НТК «Інститут монокристалів» НАН України 2013
• Назва видання: Functional Materials
• Теми: Characterization and properties
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/120064
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Hard-magnetic melt-spun R–Fe–B alloys on the base of light rare-earth metals (R=La, Nd) / O.M. Bovda, V.O. Bovda, L.V. Onischenko, O.S. Tortika, O.O. Kostin, A.G. Ravlik, B.A. Avramenko, A.S. Aseev, V.M. Baumer // Functional Materials. — 2013. — Т. 20, № 2. — С. 203-207. — Бібліогр.: 13 назв. — англ.

Effects of La addition on microstructure and magnetic properties of LaxNd₃₃₋xFe₆₅.₉B₁.₁ (wt. %) melt-spun ribbons and isotropic bonded magnets were systematically studied. X-ray diffraction and DSC data revealed that addition of La led to the formation of highly refined and inhomogeneous La-rich phase. It was shown that the average grain size and volume fraction of the main magnetic (La,Nd)₂Fe₁₄B phase depend on La concentration. For better LaxNd₃₃₋xFe₆₅.₉B₁.₁x = 2.5 and 5 wt. % bonded samples, the room-temperature magnetic properties of Hci = 1343 kA/m and 1300 kA/m, and Br= 0.61 T and 0.614 T were obtained. Magnetic flux aging loss for alloys with appropriate La content (x = 5–10 wt. %) did not exceed 5 % in the range of 100–125°C, which is typical for conventional ternary Nd–Fe–B melt-spun magnets.