抄録
We propose the new containerless process, which can attain the solidification of the levitated samples by the inert gas jet flow. By this process, light rare earth-transition metal-Al alloys was analyzed with respect to the high undercooling, bulk amorphous formation. Also, Nd-Fe binary and Nd-Fe-Al ternary alloys analyzed with respects to the high coercive force depending on undercooling and the microstructure of metastable phase. La-Cu-Ni-Co-Al alloys with SiC addition exhibited high undercooling as Δ T max= ( ΔT/Tm) = 0.28 and formed the amorphous phase. Furthermore, in Nd-(Fe, Co)-Al alloys, bulk amorphous and metastable phase with high coercive force were formed by addition of Co. The microstructure of Nd-Fe-Al systems significantly changed to cell structure from lamellar structure on the cooling rate of 100 K/s. High coercive force appearance of metastable phase in Nd-Fe alloys was clarified to depend on the random magnetic anisotropy between Nd and Fe valence electron. These results were clarified the effects of the new gas jet flow type electromagnetic levitation process to produce the new materials.
