Binary metal-metalloid alloys

In multi-component liquids, stabilization of the liquid is revealed by the formation of eutectics where the freezing temperature is suppressed. In such liquids, the atomic species (say A and B) are not distributed at random. There are more associated AB pairs (or other clusters) than expected for a random distribution. As a result in binary metal-metalloid alloys, such as Fe-B, the low melting-point eutectics occur at preferential compositions. The most common of these is at about 17 at. % B, or an atom ratio of one B for five Fe atoms (Gilman, 1978). This suggests that clusters of metal atoms surrounding metalloid atoms form (trigonal bipyramids). These probably share corners, edges, and faces. 

The numerous glass-forming binary alloys may be divided into two main categories metal-metal alloys and metal-metalloid alloys. The former category may again be subdivided into three subgroups comprising alloys of transition metals (3d, 4d, 5d), alloys of simple metals and alloys of transition metals with either rare earths... 

The formation of Al-based amorphous alloys by liquid quenching was first tried in binary systems of Al-metalloid and Al-transition-metal (M) alloys. As a result, it was found in... 

There is an empirical relation between the correlation length, r, in real space and the peak position, Q, in the intensity profile, i.e., Qr=2.5 in molten transition metal and metalloid alloys (Waseda 1980). It is plausible that this relation is also valid in the amorphous state. Thus, the correlation length causing the prepeak at 13 ran is estimated to be 0.60 nm, which agrees well with the distance between neighboring Y atoms bonded through an A1 atom. Consequently, these experimental results prove the presence of Y atoms surrounded by A1 atoms in the binary AI90Y10 alloy. 

Germanium appears to form no carbide, but it alloys with many metals and metalloids. A complete tabulation of intermetallic compounds (as of 1968)1 fists 152 compositions, from which the representative metal germanides of Table 5 have been abstracted. The relation of Ge with Si is unique a continuous series of solid solutions is formed, and the two liquids also form ideal mixtures. About eighty ternary intermetallic compounds are known, and phase diagrams for many of the binary and ternary systems have been reportedly. 

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