Research Of Bulk Amorphous Metallic Forming Ability Of Fe-base

Recently Fe-base metallic glass had been one of focus all over the world. It was characterized by cheaper price, good soft magnetism , abroad application and so on. It was limited to utilize in large fields because the forming ability of Fe-base amorphous was worse. So it was very important to find one effective way to study its metallic glass forming ability.In this paper the optimal components that was designed by CAPHAD for Fe—Zr —B ternary alloys was Fe₈₀Zr₆B₁₄.The Fe-base suction casting samples Fe₈₀Zr₆B₁₄, Fe₇₈Zr₇B₁₅, Fe_78Zr(10)B₁₂, Fe₈₂Zr₃B₁₅ in diameter of 2mm were prepared by copper mold casting. And prepared rods of Fe_80-xCo_xZr₆B₁₄ (X = 0,10,20,30) and Fe₈₀Zr₆B_14-xSi_x (X=0,2,4,6 ) in 2mm diameter and Fe₆₀Co₂₀Zr₆Cu₁B₅Si_5-xCr_x (X=1,2,3) in 1mm diameter.It was showed by XRD and DSC that samples were not completely amorphous with some diffractional peaks of Fe phase and Fe₂B phase. The same phenomenon appeared in the rods of Fe₈₀Zr₆B₁₄, Fe₇₈Zr₇B₁₅, Fe₇₈Zr₁₀B₁₂, Fe₈₂Zr₃B₁₅ in 2mm diameter. But the best component was Fe₈₀Zr₆B₁₄ by studying the intensity and FWMH of XRD. This was corresponding to the result by calculating form theory.Analyzing the XRD patters of Fe_80-xCo_xZr₆B₁₄ (X=0,10,20,30) samples it was show that the diffraction peak was the lowest when the X value was 30 with the addition of Co substituted for Fe. As to Fe₈₀Zr₆B_14-xSi_x (X=0,2,4,6) system the addition of Si didn't lead to the peak of Fe low obviously, so it was concluded that the substitution of Si atomic for Fe atomic couldn't improve the forming ability .In this paper Fe_60-xCo₂₀Zr₆Cu₁B₈Si₅Cr_x (X=1,2,3) system were studied in the diameter of lmm with the similarity peaks. The relation of simply line between X and the forming ability of amorphous alloys were not reflected with the addition of X. But when X was 2, Fe₅₈Co₂₀Zr₆Cu₁B₈Si₅Cr₂ showed the lowest peaks and the best trend of...