Liquidus isotherm

Fig. 3. Liquidus isotherms of gold—cooper—nickel alloys and phase diagrams of the binary substituents (85).

Fig. 13. Calculated ternary liquidus isotherms and experimental points. Triangles are from Blom and Plaskett (1971) and circles from Antypas (1972). Dotted curves are calculated by Gratton and Wooley (1978), dashed curves are calculated by Blom and Plaskett.

Fig. 16. Calculated liquidus isotherms (solid lines) and solid isoconcentration lines (dotted lines). The labels on the isotherms are in degrees Celsius. The numbers along the InSb-GaSb section label the solid isoconcentration lines and are the mole fraction GaSb in the GaSb-InSb solid solution. The dashed line across the upper part of the figure is the calculated eutectic valley.

The liquidus isotherms and solid-solution isoconcentration lines over the entire Gibbs composition triangle are shown in Fig. 28. A point to be elaborated upon further below is that in the Hg-Cd rich half the solid-solution isoconcentration lines turn to the Hg corner even for very high x values. An expanded plot near the -rich corner is shown in Fig. 29. The liquidus isotherms match Harman s (1980) experimental values for Cd < 0.005 and are close to his for 550 and 600°C. However, his 450 and 500°C isotherms are displaced from the calculated lines towards higher xCd by about 0.003 in xCd-The calculated isoconcentration lines agree with the composition analysis of films grown epitaxially upon CdTe substrates by Harman (1980) for x = 0.2 and 550°C, x = 0.3 and 575°C, x = 0.4 and 580°C, and x = 0.5 and 580°C. 

Fig. 29. Liquidus isotherms (solid) and solid-solution isoconcentration lines (dashed) for -rich liquids. The numbers adjacent to the isoconcentration lines are the values of x in Hgl jtCdxTe(s). The ordinate is the atom fraction of Hg in the liquid phase on a log scale, the abscissa is the atom fraction of Cd in the liquid on a linear scale.

Fig. 32. Liquidus isotherms and solid isoconcentration lines for Hg-rich liquids. Axes are atom fractions in the liquid. Nearly straight lines slanting up towards the right are the solid isoconcentration lines for labeled values of x in the formula Hg1, CdJtTe(s)— solid lines are calculated, dotted lines are the average of narrow bands established experimentally (Riley, 1980). Isotherms with labeled values of temperature in degrees Celsius are curves bending downwards left to right. Solid curves are calculated, dashed curves are smoothed curves through experimental points.

The calculated liquidus isotherms for the Hg-Cd-Te system in Fig. 28 show that the liquidus temperature is not always a maximum in the HgTe-CdTe pseudobinary section. Figure 38 shows the liquidus surface between this pseudobinary and the Hg-Cd axis in more detail for comparison with ten experimental ternary liquidus points obtained by Szofran and Lehoczky... 

These lines are called liquidus isotherms. The intersections of adjoining liquidus surfaces like ae, be and ce are called the boundary curves. When a liquid whose composition lies in the region surrounded by Aceh is cooled, the first crystalline phase that appears is A, and hence A is called the primary phase and the region Aceh is the primary field of A. In this field, solid A is the last solid to disappear when any composition within this field is heated. Similarly,B and C are primary phases in their respective primary fields, Baec and Caeb. 

Sch2] Chemical analysis of compositions of two liquid layers after exposition at certain temperatures and quenching. Tammann furnace, graphite crucibles, electrolytic Fe and Cu. Thermodynamic calculation The liquidus surfaces with the miscibility gap and liquidus isotherms. The melting equilibria in stable and metastable systems. 

Takl] Spectrophotometric titration, optical microscopy Oxygen isobars and liquidus isotherms at 1200 and 1300°C... 

Tak] Controlled oxygen partial pressure Liquidus isotherms... 

A detailed map of the locations of the austenite and ferrite phases in the HAZ of this duplex steel weld is shown in Fig. 7. The map is based on a combination of the SRXRD data and the calculated weld pool temperature profiles[20]. Three primary phase regions are observed a liquid phase, a single phase 5-Fe (bcc), and a two phase 5-Fe (bcc) + y-Fe (fee) region. Superimposed on these phase regions are the calculated liquidus isotherm at... 

Figure 3 gives the liquidus isotherms under 0.1 MPa N2 and between 1550 and 1700°C according to [1978Wad]. The solubility of N2 in liquid Al-Fe alloys calculated by [1992Hil] under 0.1 MPa pressure at 1900 K is shown in Fig. 4. A reasonable agreement is observed with experimental solubilities measured by [1978Wad] in the iron-rich part of the diagram.

Figure 1 shows a projection of the liquidus isotherms of the ternary system, taken from the assessment of [1988Gui]. The direction of the arrows on the univariant line suggests a minimum in agreement with the... 

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