Ternary Phase Diagrams

You can use the TCS Ultra-high Temperature Materials Database (TCUHTM) to plot ternary phase diagrams in Thermo-Calc. Each assessed ternary system is modeled to accurately describe experimental phase diagram data available in the literature. These examples show a selection of the important assessed systems that are the building blocks of the database itself when applying the CALPHAD method.

The CALPHAD Method and the Thermo‑Calc Databases. Also visit the video tutorials on our website or our YouTube playlist.

When working in Thermo‑Calc with ternary diagrams you use either the Ternary Calculator (in Graphical Mode) or the Ternary module (in Console Mode). The fundamental calculation engine is the same but you access the settings in different ways.

Hf-B-C

Calculated Hf-B-C isothermal section at 1773 K.

Figure 1: Calculated Hf-B-C isothermal section at 1773 K.

HfB2-C

Calculated vertical section of at HfB2-C with experimental data.

Figure 2: Calculated vertical section of at HfB2-C with experimental data from [1966Rud].

Hf-Si-B

Calculated Hf-Si-B isothermal section at 1573 K.

Figure 3: Calculated Hf-Si-B isothermal section at 1573 K.

Zr-B-N

Calculated Zr-B-N isothermal section at 1773 K.

Figure 4: Calculated Zr-B-N isothermal section at 1773 K.

Ta-B-C

Calculated Ta-B-C liquidus projection.

Figure 5: Calculated Ta-B-C liquidus projection.

Reference

[1966Rud]  E. Rudy and S. Windisch, Ternary Phase Equilibria in Transition Metal-Boron-Carbon-Silicon Systems,'' Part II, Vol. XIII, Report AFML-TR-65-2, II, Vol XIII. Air Force Materials Laboratory, Wright Patterson Air Force Base, OH, 1966.