This manuscript explores the influence of atomic structure on glass forming ability and thermal stability in binary metallic glasses. A critical assessment gives literature data for 628 alloys from 175 binary glass systems. The atomic structure is quantified for each alloy using the efficient cluster packing model. Comparison of atomic structure with amorphous thickness and thermal stability gives the following major results. Binary glasses show a strong preference for discrete solute to solvent atomic radius ratios R*, which give efficient local atomic packing. Of 15 possible R* values, only five are common and only four represent the most stable glasses. The most stable binary glasses are also typically solute rich, with enough solute atoms to fill all the solute sites and roughly one-third of the solvent sites. This suggests that antisite defects, where solutes occupy solvent atom sites, are important in the glass forming ability of the most stable glasses. This stabilising effect resul...

An assessment of binary metallic glasses: correlations between structure, glass forming ability and stability

Progress of research on magnetism in China

Investigations of the temperature dependence of magnetization of amorphous rapidly quenched alloys AxCo80−xB20 (A = B, Al, Si, and Ni) reveal that a substitution of Co by Al and Si atoms causes a faster suppression of magnetization as compared with the Ni substituted alloys. A temperature variation of the electrical resistivity shows that its structural component dominates over the magnetic one. A overwhelming diffusional contribution to the thermoelectric power is found.



Untersuchungen der Temperaturabhangigkeit der Magnetisierung von amorphen, schnell abge-schreckten kxCo80−xB20 (A = B, Al, Si und Ni)-Legierungen zeigen, das eine Substitution von Co durch Al- und Si-Atome eine schnellere Unterdruckung der Magnetisierung im Vergleich mit Ni-substituierten Legierungen verursacht. Eine Temperaturanderung des elcktrischen Widerstands zeigt, das seine strukturelle Komponente uber die magnetische dominiert. Ein uberwiegender Diffusionsbeitrag zur Thermospannung wird gefunden.

Magnetic and Electrical Investigations of Amorphous Alloys AxCo80−xB20 (A = B, Al, Si, and Ni)

We report here our results on magnetization study of amorphous Co/sub 100-x/B/sub x/ ribbons with 20/spl les/x/spl les/30 at.% B in the temperature range 10 K to 800 K and in applied magnetic field 5/spl middot/10/sup 3/ A/m. The thermomagnetization curve is found to obey the Bloch law, M/sub s/(T)=M/sub s/(0)(1-/spl beta/T/sup 3/2/-/spl gamma/T/sup 5/2/, spin wave stiffness constant and the range of the exchange interaction were calculated from the experimental results. We have found that the B content has a strong effect on stiffness constant D. >

Temperature dependence of the magnetization and of the other physical properties of rapidly quenched amorphous CoB alloys

The behaviour of electrical resistivity in amorphous Co100−xBx alloys

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The behaviour of electrical resistivity in amorphous Co100−xBx alloys