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Physical Factors in Phase Formation
Published in Daniel D. Pollock, PHYSICAL PROPERTIES of MATERIALS for ENGINEERS 2ND EDITION, 2020
Another type is one in which the liquidus shows a minimum as a function of composition (Figure 10-10c). This is usually observed between pairs of transition elements. Some systems showing this behavior include chromium-iron, copper-manganese, iron-palladium, iron-vanadium, nickel-palladium, and platinum-manganese. However, other systems such as potassium-rubidium, copper-gold, and arsenic-antimony have liquidus curves of similar shapes. The appearance of a minimum in the liquidus represents intermediate behavior approximately between that of an isomorphous system and a eutectic system with terminal solid solutions.
General Considerations
Published in D. R. F. West, N. Saunders, Ternary Phase Diagrams in Materials Science, 2020
It is relevant to consider briefly, in the light of the Phase Rule, the representation of equilibria involving various numbers of phases. For this purpose it is assumed that the solid phases are of variable composition, and comparison is made of equilibria in binary and ternary systems, making reference to a hypothetical binary eutectic system showing partial solid solubility (Figure 1.7). It should be noted that constant pressure is assumed and the reduced Phase Rule is used.
Phase Diagrams
Published in Zainul Huda, Metallurgy for Physicists and Engineers, 2020
Refer to Figure 6.4. Consider a Pb-40 wt% Sn alloy at 150oC. (a) Determine the relative amounts (weight fractions) of each phase present in the specified alloy composition at the specified temperature. (b) Calculate the volume fraction of each solid phase in the eutectic system. Take densities of Pb and Sn at 120oC to be 11.27 and 7.29 g/cm3, respectively.
Experimental study of making Sn-10 wt%Pb alloy by using directional solidification under different magnetic field arrangements
Published in Journal of the Chinese Institute of Engineers, 2020
Timothy Alfred Wu, Long-Sun Chao
In this research on solidification, lead-tin (Sn-10wt%Pb) alloy is utilized as the casting material. The lead-tin alloy is a classic eutectic system. This alloy system is the basis for the most common alloys used for soldering because of the low melting point and good adhesion. The molten alloy is poured into a vertical mold and then solidifies there. The vertical mold is a cylindrical riser sleeve (80 mm in height, 25 mm in inner diameter, and 35 mm in outer diameter). The riser sleeve is made of insulating materials that reduces the radial heat loss.