Binary joins phase relations

Figure 5,27 Phase stability relations along binary join CaFeSi206-Fe2Si206 under various P conditions. From Lindsley (1982). Reprinted with permission of The Mineralogical Society of America.

Figure 7.5 Phase stability relations in binary join CaAl2Si208-NaAlSi308 (anorthite-albite).

Figure 7.10 Phase stability relations in a ternary system in which components are totally immiscible at solid state, and relationships with three binary joins.

The liquidus surface taken from [1988Ray] which is based onthe workof [1932Koel] is presented in Fig. 2. As mentioned above, the invariant L + (Mo) a + p is unlikely to exist in the system. This is removed from the original liquidus surface as presented by [1932Koel]. Instead, there is now a monovariant connecting the binary peritectic reactions related to the formation of the a phase in the Fe-Mo and Co-Mo systems. It is also necessary to add a monovariant related to the peritectic formation of the R phase in the Fe-Mo system. This line is shown to meet the monovariant line from the peritectic point in the Co-Mo binary associated with the formation of the p phase. At this intersection, a new monovariant joins the monovariant... 

In the upper part of Fig. 9.11, which represents a typical binary mixture, the enthalpies of saturated vapors at their dew points have been plotted vs. y and those of the saturated liquids at their bubble points vs. x. The vertical distances between the two curves at x = 0 and 1 represent, respectively, the molar latent heats of B and A. The heat required for complete vaporization of solution C is Hq — H(2 energy/mole solution. Equilibrium liquids and vapors may be joined by tie lines, of which line EF is typical. The relation between this equilibrium phase diagram and the xy plot is shown in the lower part of Fig. 9.11. Here the point G represents the tie line EF, located on the lower plot in the manner shown. Other tie lines, when projected to the xy plot, produce the complete equilibrium-distribution curve. 

---