Abstract
The microstructural features of as-cast alloys are predominantly influenced by the fabrication process, which eventually determine the properties. In the present work, we demonstrate that the microstructure (e.g., composition, phase constitution and distribution) and the magnetocaloric properties of the La(Fe,Si)13 alloys can be effectively tailored by tuning the solidification kinetics. La(Fe,Si)13 alloys with different dimensions were prepared by suction casting and jet casting. Finite element (FE) simulations reveal a difference in the temperature gradient along the solidification path of the rapid solidification process. The microstructure difference between the edge and center regions in the as-cast ingots along the solidification direction is increased for the samples with larger diameter. This can be attributed to the different solidification kinetics as predicted by the FE simulations. More homogeneous microstructure can be observed in the samples with a smaller size. The largest magnetic entropy change value of 16 J/kg·K can be obtained in thin plates, which is comparable to that of master bulk alloy. Our thorough study of solidification mechanisms during rapid solidification provides research basis for manipulating the microstructure homogeneity and the related properties, which also paves the way for the study of other rapid-solidificated materials.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
