The structure and magnetic properties of melt- spun multicomponent FeviGazAlsPu-iC-4Six (x=0-10) alloy sheets were investigated. The increases in the thermal stability and glass forming ability, and the improvement of the soft magnetic properties were recognized with the replacement of P by 1 - 2 at% Si. The supercooled liquid region (AT) defined by the difference between crystallization temperature (Tx) and glass transition temperature (Tg) increases from 51 K for the Fe72Al5Ga2PiiC6B4 alloy to 65 K for the Fe72AlsGa2P9CB4Si2 alloy, and then decreases with increasing Si content. The maximum thickness for glass formation (tmax) also increases from 140 urn for the Fe72Al5Ga2PiiCB4 alloy to 190 jim for the FcTiAIsGazPgCJ-4Siz alloy. The increases in ATX and t-4x are presumably because of increased agreement with three empirical rules for glass formation. The soft magnetic properties at the thickness of over 70 \im are also improved by the replacement of 1 - 2 at% Si. The magnetic properties for the Fe72AlsGajP9C6B4Si2 amorphous alloy with the thickness of 190 Jim after optimum annealing (623 KX 1.8 ks) are 169 X10"' Wbmkg"1 for saturation magnetizationfa,), 1.0 A/m for coercive force (Hi), and 9000 for permeability-4) at IkHz. It is therefore expected that the Fe-based amorphous alloy containing 2 at% Si is widely used as a bulk amorphous material with good soft magnetic properties.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering