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1 2008

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Liquid eutectic alloys as a cluster solutions

Mudry S., Shtablavyi I., Shcherba I.

Archives of Materials Science and Engineering

2008

Vol. 34, nr 1

14-18

Purpose: In this research work the results of structure studies for Al0.88Si0.12, Bi0.995Cu0.005, Al0.83Cu0.17 eutectic and Co0.05Cu0.95 peritectic melts have been presented. The structure parameters of molten alloys are compared with ones for liquid pure components and with model values. Design/methodology/approach: The structure in liquid state has been studied with use of X-ray diffractometer containing special attachment for investigation of liquid metallic alloys. The system was equipped with special camera for sample, filled with pure helium in order to avoid the oxidation. Experimental data were interpreted with using of random atomic distribution model and self-associated one. Findings: The research has shown that structure of liquid alloys Al0.88Si0.12, Bi0.995Cu0.005, Al0.83Cu0.17 and Co0.05Cu0.95 shows the deviation from random atomic distribution model and these alloys in liquid state at temperatures not far from melting point can be considered as cluster solutions. Practical implications: Existence of clusters in eutectic and peritectic melts influence the structure and properties of corresponding solid alloys, that is important for casting, soldering, welding and at producing of composite materials on the base of eutectic matrix. Originality/value: Cluster structure of eutectic melts is responsible for behaviour of structure and physical-chemical properties. The change of this structure allows to improve the properties of solidificated alloys, both crystalline and amorphous.