The NIST Metallurgy Division
has long played a major role in the generation, evaluation and use of alloy
phase diagrams. Between 1982 and 1990, an international effort to
evaluate binary phase diagrams was coordinated by the Metallurgy Division
In recent years, our effort has focussed on some specific families
of alloys, including nickel-based superalloys for aerospace applications
and high-temperature and lead-free solders.
A phase diagram is the representation of phase equilibria present
in a system as function of the controlling variables, typically composition
Computational Thermodynamics is the discipline by which phase
diagrams are generated by analysis of the basic thermodynamic properties
of the system. Computational thermodynamics enables us to predict
some features of the system which are not easily measured, as well as to
predict phase diagrams of complex multicomponent systems.
To learn more about how phase diagrams and computational thermodynamics
are used follow these links:
For additional information on phase diagrams and computational thermodynamics
follow these links:
Follow the link to the Ceramics WebBook
to find information on ceramic systems and a glossary of phase equilibria terms.
Follow the link to ASM to find more information on the handbooks on
Binary Alloy Phase Diagrams that resulted from the NIST/ASM collaboration.