Abstract
In the present work, the effect of the partial substitution of Fe by Ti on the magnetic properties, Curie temperature and microstructure of Ce17Fe78-xTixB6 (x = 0–5 at.%) alloys are thoroughly investigated. The results reveal that the optimal magnetic properties of Br = 4.8 kG, Hcj = 5.45 kOe, Hk/Hcj = 0.47, Br/Bs = 0.64, (BH)max = 5.4 MGOe have been obtained for the x = 1 alloy heat treated at Ta. Meanwhile, it is shown that the addition of a small amount of Ti can decline the volume fraction of the paramagnetic CeFe2 phase and contribute to form more magnetic Ce2Fe14B phase, while the grain size of the Ce2Fe14B phase could not be effectively optimized due to the higher optimum treatment temperature Ta. The results of Henkel plot show that the Ti-doped alloy with a higher positive δM value and narrower peak is in charge of the enhanced magnetic properties.
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