Effect of yttrium addition on thermal stability and glass forming ability in Fe-TM (Mn, Mo, Ni)-B ternary alloys

Abstract

The effect of Y addition on the glass forming ability (GFA) of in Fe70TM(TM=Mn,Mo,Ni)(13)B-17 alloys have been examined in the present study. Substitution of 3-10 at% Fe with Y improves the GFA. Fe70-xMn13B17Yx (x = 5) and Fe70-xMo13B17Yx (x = 3) alloys exhibit high T-rg (= T-g/T-l) (>0.55) and gamma (= T-x/[T-l + T-g]) (>0.37) values enabling fabrication of 1 mm diameter bulk metallic glass. The GFA improves, when addition of Y decreases the melting temperature, and, at the same time, increases the crystallization onset temperature. Extended Kissinger analysis of the DSC data indicates that a kinetic boundary condition for the formation of the amorphous phase widens by addition of Y.