Fe80B20−xSix glasses: A study of some physical properties as depending on metalloid content

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Abstract
It is found that the formation of Fe80B20−xSix metallic glasses and their thermal stability improve considerably upon substituting silicon for boron in the range 0<xx is relatively small. The variation of the magnetic properties, being different from those of corresponding cobalt glasses, is discussed in terms of change in the band shape through electron hybridization and of charge transfer which occurs when transition metals are alloyed with metalloid elements. The microhardness decreases continuously as boron is replaced by silicon. With a simple model, by treating atoms as macroscopic pieces of material, it is shown that this effect is due to variations of the molar volume and compressibility of the different metalloid elements.