Quasibinary section

The series provides consistent phase diagram deseriptions for individual ternary systems. The representation of the equihbria of ternary systems as a function of temperature results in spaeial diagrams whose sections and projections arc generally published in the literature. Phase equilibria are deseribed in terms of hquidus, soUdus and solvus projections, isothermal and quasibinary sections data on invariant equilibria are generally given in the form of tables. 

Structure data are summarized in Table 2. No ternary phase has been reported in the Cr-Fe-Zr system. However binary Laves phases show extended solubihty ranges along the ZrFc2-ZrCr2 quasibinary section. The variation of the lattice parameters with composition along the section are reported in Fig. 1 according to [1970Kan]. 

Cr-Fe-Zr. Laves phase lattice parameters versus composition across the ZrFe2-ZrCr2 quasibinary section... 

Here, the compositions which ensure the maximum electron density are presented in terras of the composition of the liquid phase. This is because the composition of the solid phase was not analyzed for In and Sb contents (it is fairly complicated to do this), whereas there was no certainty that the solid solution was not displaced from the corresponding section during crystallization only in the case of compositions taken corresponding to the quasibinary section InSb-InTe. 

The invariant equilibria are listed in Table 3. They are almost confined to Arose in the quasibinary sections UC-Fe, UC-UFC2 and Are vertical section Fe- UC2 (see below). 

Fle] and [1969Ebe] reported solubility data of VC, in austenite at 1000°C. Phase equilibria along the Fe-VC quasibinary section have been studied by [1975Fre] and [1978Dmi]. 

Dmi] Light microscopy, SEM, EPMA, DTA, dilatometry up to 1550°C, Fe-VC quasibinary section (up to 70 mass% VC)... 

Although it was mentioned in some articles, CaO-FeO is not a trae quasibinary section since FeO is not a stoichiometric phase and iron is present in this section. This section is reported in the section Temperature-Composition Sections. 

I he curve of intersection of the plane TOX with the binodal surface is a quasibinary section (see Figure 3.10), also called a cloud-point curve (CPC) according to a way of its experimental determination when a solution (a system with an UCST) is being cooled and then temperature of its turning cloudy is fixed by means of a colorimeter or nephelometer, cus well as visually. 

Figure 3.12. Schematic of the quasibinary section of a ternary (multicomponent) system, Tp, is tile temperature of the precipitation threshold CPC is the cloud-point curve (tlw phase boundary). / stands for the phase coexistence curves at the total polymer concentration V cj and 4. SL is the shadow line. The concentrations of the coexisting...

Koningsvcld-Staverman s methods of computing the basic quantities of phase separation are capable of determining the location of the characteristic curves of a quasibinary section for some model MWl) functions. 

In strictly binary systems, the precipitation threshold matches the critical temperature aiul the CPC matches the binodal (the phase coexistence curve) (Francis, 1963). The CPC location on a quasibinary section of a polynary sy.stem depends on the MWD function and the thermodynamic properties through x = x(T, V=, MWD). 

Figure 3.96. Surface in the ternary system 0+1 +2 LMWL- -monomer (pi = 1)- -P(p2 = 25). p is a quasibinary section 0-( 1-1-2) lej = PtK Px + p. ) (the LMWL concentration is constant). The sections of the x, surface by parallel planes wj 3nd p show the CPC the dotted line is the crilicaJ line in the unstable region the dashed line is the critical line in the stable region the circles are the critical points the dot-and-dash line is the three-phase line (Sole, 1970) (Reprinted with permission from Macroinolecules 3 (1970) 665-673. Copyright 0 1970 American Chemical Society)...

A variation of the total (1+2) concentration with reference to zero is a quasibinary section (p at a constant LMWL (component 0) concentration ... 

Fig. 8. Selected quasibinary sections through the Ndn.,Ba2, Cu30, solid solution field (solid symbols and lines represent experimental data taken from different works dotted lines give schematically boundaries of possible phase fields) (a) (3BaCu02 + 2Cu0)-1 Nd4Ba2Cu20, section containing the x = 0.0 phase (b) jBaCuOj - j(Nd2Cu04 + Cu0) section and the actual shape of the Ndl23ss field. Note that solid solution is extended between Sj and S2 (S2ssl.0=x, ) and the S point does not necessarily correspond to the x = 0.0...

Fig. 12. Phase diagrams of anomalous R123 (a) Prll0-(BaCuO2+2CuO) quasibinary section (Sumida et al. 1995) 211 phase type does not exist in this system (b) presence of both high- and low-temperature stability boundaries for Ybl23 (Osamura and Zhang 1993).

The temaiy systems Li-N-Cl, Li-N-Br, and Li-N-1 show several ternary fast ion condirctors along the quasibinary sections Li3N-lithium haUde. The Gibbs energies of formation were determined by electrochemical decomposition of the electrolyte and forming the eqrrihbrirrm electrode phases in situ. The decomposition voltages were then used to calculate the thermodynamically most favorable phase relations. 

The technique allows one to obtain the Gibbs energy of formation for any composition, not only for those along the titration path toward the comer of the electroactive component of the Gibbs triangle. Results for the quasibinary Section InSb-LijSb of the temaiy system Li-In-Sb are shown in Figure 9.10. ... 

FIGURE 9.10. Standard Gibbs energies of formation along the quasibinary section InSb-LijSb as calculated from the phase diagram Li-In-Sb and the emfs of the three-phase regions. 

---