Microinhomogeneity of Liquid Alloys: Microscopy characterization and new production methods
Microscopy and Microanalysis
The modern notions on the structure of liquid metals and alloys are surveyed. It is shown that several types of microinhomogeneity and microheterogeneity of liquid metallic solutions can exist. Varying their composition and pre-history, the temperature and the pressure or influencing them with various external impacts, one can change their structural state. At subsequent cooling with appropriate rate, these changes can be conserved down to liquidus and influence the structure and properties of
... and properties of solidified alloy. Various techniques were used to analyze the microstructure of the solidified alloys, including scanning electron microscopy, transmission electron microscopy and energy X-ray spectroscopy. Same examples of the alloys were treated by new technology and reviewed. These alloys are characterized by multiphase amorphous or crystalline structure. It is shown that such optimized thermal treatment of melts is efficient for both rapidly quenched metallic materials (amorphous ribbons, bulk amorphous alloys and glass coated microwires) or alloys produced by sand or chill casting technology.