Microstructure and Magnetocaloric Effect by Doping C in La-Fe-Si Ribbons

Materials

Xueling Hou¹  Jinyu Fang¹  Yuhu Hu¹  Huihui Song¹  Jiale Zhang¹ 

[1] School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;

关键词: microstructure;    magnetocaloric effect;    rapid solidification;    annealing;    maximum isothermal magnetic entropy;   

DOI  :  10.3390/ma15010343

来源: DOAJ

【 摘 要 】

The melt-spun ribbons of LaFe_11.5Si_1.5C_x (x = 0, 0.1, 0.2, 0.3) compounds are prepared by the melt fast-quenching method. The doping of C is beneficial to the nucleation and precipitation of the La (Fe, Si)₁₃ phase, which is indicated by the microstructure observation and the elemental analysis. Subsequently, the ribbons of LaFe_11.5Si_1.5C_0.2 are annealed at different times, and the phase composition, the microstructures, and the magnetic properties are investigated. The LaFe_11.5Si_1.5C_0.2 ribbons annealed at 1273 K for 2 h achieved the best magnetic properties, and the maximum isothermal magnetic entropy change with a value of 9.45 J/(kg·K) upon an applied field of 1.5 T at an increased Curie temperature 255 K.

【 授权许可】

Unknown