Abstract
The melt spinning of Fe–B and Fe–Si–B alloys with a melting point up to 1580 K was carried out and the spinning was successfully performed from a melt at a temperature of 1630 K with winding speeds ranging from 0.95 ms−1 to 7.95 ms−1. The diameters of the filaments obtained were 2 to 13 μm and decreased with increasing winding speed. In the filament quenched at a cooling rate higher than 105 Ks−1, an amorphous structure and a solid solution phase were observed. The addition of Si, Ni or Cr to the Fe85B15 alloy, resulted in formation of the amorphous phase and extension of the solid solubility limit.
The tensile strengths were increased by adding Si, Co or Cr; for example, a high average tensile strength such as 4.4×103 MPa was attained for Fe65Co10Si10B15 filaments. The size effect on the strength was observed for Fe85B15 and Fe75Si10B15 filaments and not for (Fe90Co10)85B15 and Fe65Co10Si10B15 filaments.
