Antimony phase diagrams

The copper-antimony phase diagram contains two eutectic reactions and one eutectoid reaction. For each reaction ... 

FIGURE 8.8 Ttie gold-antimony phase diagram (Courtesy of ASM International). 

The phase diagram for the copper-antimony system is shown on the next page. The phase diagram contains the intermetallic compound marked "X" on the diagram. Determine the chemical formula of this compound. The atomic weights of copper and antimony are 63.54 and 121.75 respectively. 

The potassium/caesium phase diagram is an example of a system involving the formation of mixed crystals with a temperature minimum (Fig. 4.4). The right and left halves of the diagram are of the same type as the diagram for antimony/bismuth. The minimum corresponds to a special point for which the compositions of the solid and the liquid are the same. Other systems can have the special point at a temperature maximum. 

Phase diagrams for antimony/bis-muth and potas-sium/caesium at ambient pressure... 

It is relevant that attention should now be drawn to the recent work, by Patterson, Pyke, Reid, Tilley, McAteer, et al. (12-16), who have examined several aspects of the structural and catalytic character of coprecipitated tin-antimony oxides. The structure characterization by Pyke, Reid, and Tilley (12) by X-ray diffraction techniques clearly showed that bulk equilibrium is difficult to establish in this system. This observation alone places some earlier data in a different perspective and implicitly demands a high degree of caution in the interpretation of physical and spectroscopic data recorded from these materials. The phase diagram (Fig. 1) defines the... 

The phase diagram and the thermodynamic properties of the liquid phase in the antimony-selenium system were assessed by Ghosh, Lukas, and Delaey [89GHO/LUK] and by Ghosh [93GHO]. Sb2Sc3(cr) is the only intermediary compound in the system. 

Figure 1 shows phase diagram of indium and antimony. Indium and antimony formed indium antimonide alloy at compositional ratio of 50 at.% 50 at.%, and formed eutectic structure of Indium antimonide and antimony at compositional ratio of 70 at.% 30 at.%. 

The lead-antimony system has the simple eutectic type of phase diagram (Fig. 15.7). The regions are labeled L signifies liquid, Sb or Pb signifies pure solid antimony or pure solid... 

Aluminum-gallium-antimony system, ternary phase diagrams, 292... 

Ecjuilibrium Phase Diagram and Microstructure of the Lead—Antimony Alloy System... 

In the liquid state (melt) antimony is fully soluble in lead. On cooling the melt, formation of an a-Pb solid—solution starts whose composition depends on temperature and Sb content in the melt. Figure 4.3 presents the equilibrium phase diagram of the Pb—Sb system [13]. It reflects the thermodynamic state of the system when the phases are in equilibrium. 

A juxtaposition of the data in Fig. 4.9 with the equilibrium phase diagram of the Pb—Sb system presented in Fig. 4.3 indicates that, at 252 °C and up to 3.5 wt% loading level in the alloy, antimony has the highest solubility in a-Pb dendrites. On cooling, the dendrites get oversaturated with Sb and reorganisation of the structure of the solid phases starts, whereby the content of Sb in the a-Pb dendrites diminishes to 0.1% at room temperature. This improves the mechanical properties of the alloys. At Sb content between 3.0 and 11 wt%, the amount of the eutectic phase in the alloys changes but slightly, which results in minor improvement of their mechanical properties. 

Per] Perbix, G., On Thermodynamics and Technology of Removing of Copper, Tin and Antimony from Iron and Lead (in German), Thesis, Aachen, 1-145 (1959) (Phase Diagram, Experimental, Morphology, Themodyn., 163)... 

The problem occuring in zinc antimony materials is due to difficulties in the crystal growth of materials. Having initially a high figure of mait, those T.E. materials could have better properties with some achievement in the metallu cal processes (15). These difficulties are easily understood by a complicated phase diagram. Up to our recent paper (16) die Afferent phase equilibria determinations lead to six different ersions of this phase diagram. These differences were due to real difficulties in the phase stabilities and consequenUy to the phase equilibria determination. 

Fig. 123. Main features of the phase diagrams of antimony with rare earths and actinides.

Recent investigations of rare-earth-antimony binary phase diagrams have been performed by Abdusalyamova et al. (1990a,b). All the R-As and R-Bi binary systems have been evaluated by Gschneidner and Caldcrwood (1986b, 1989b). Ferro et al. (1988) have... 

Examples of lead-antimony and lead-calcium alloys show the phase diagrams in Figures 9.4 and 9.5. In practice the influences are substantially more complex, because of additional alloy compounds beyond binary alloys. 

Figure 9.4 Phase diagram of a lead antimony alloy.

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