Solidification Behavior of Rapidly Quenched LaFe_13-xSi_x Alloys

Abstract:

Solidification behavior of LaFe_13-xSi_x alloys was investigated using rapidly quenching and. Phase formation and structure in rapidly quenched LaFe_13-xSi_x alloys has been investigated by means of power X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The results have shown that 1:13 phase is a peritectic phase. The solidification behavior of LaFe13-xSix alloys depend on x, cooling rate. Under small undercooling, the 1:13 phase is difficult to formed with x=0.5 to 3.0. The α-(Fe,Si) phase and the 1:2:2 phase is mainly phase in the microstructure of alloy with low and high Si contents, respectively. Under higher cooling rate, the microstructure of compositions with x≥1.5 occurs the 1:13 phase. The α-(Fe,Si) phase and the 1:13 phase is mainly phase in the microstructure of alloy with low and high Si contents, respectively. The microstructure of compositions with x=2.5 to 3.0 are mainly phase which is primary phase. The results were discussed with respect to the effect of cooling rate.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 62-66
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.62
• Online since: January 2013
• Authors: Zhong Qi Dong, Jun Suo Li, Ti Wen Han, Jin Chen
• Keywords: LaFe_13-xSi_x, Rapidly Solidification, Rare Earth (RE), X-Ray Diffraction (XRD)

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