Effect of Yttrium Addition on Thermal Stability and Glass Forming Ability in Fe-TM (Mn, Mo, Ni)-B Ternary Alloys
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The effect of Y addition on the glass forming ability (GFA) of in Fe<SUB>70</SUB>TM(TM=Mn, Mo, Ni)<SUB>13</SUB>B<SUB>17</SUB> alloys have been examined in the present study. Substitution of 3-10 at% Fe with Y improves the GFA. Fe<SUB>70−x</SUB>Mn<SUB>13</SUB>B<SUB>17</SUB>Y<SUB>x</SUB> (x = 5) and Fe<SUB>70−x</SUB>Mo<SUB>13</SUB>B<SUB>17</SUB>Y<SUB>x</SUB> (x = 3) alloys exhibit high T<SUB>rg</SUB> (=T<SUB>g</SUB>/T<SUB>1</SUB>)(>0.55) and γ (=T<SUB>x</SUB>/[T<SUB>1</SUB> + T<SUB>g</SUB>]) (>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.
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The Japan Institute of Metals and Materials | 論文
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