Effects of process conditions on the properties of Fe40Ni40B13Si7 glassy ribbons

Abstract More than 10 kg of Fe 40 Ni 40 B 13 Si 7 metallic glassy ribbons were produced by the single-roller chill block method via planar flow casting. The quartz crucibles used had rectangular nozzles of 12X0.5 mm 2 . Three chill blocks of the same diameter were manufactured of Cu -Cr-Zr, Cu -Co-Si and Cu -Be alloys of different thermal conductivity, λ. The ejection pressure, Δ p and the surface velocity, v r were varied. The average ribbon thickness, t , the resistivity, ϱ, the temperature coefficient of resistivity, α, the thermoelectric power, Δ S , the microhardness, HV , and the static coercive forces, H c, and H c,⊶ were measured. The correlations among the parameters mentioned were analyzed. It was found that H c is most strongly correlated with an empirical cooling rate, CR = λ/ t and the ejection pressure, Δ p .