About the TCS Permanent Magnetic Materials Database (TCPMAG)

The TCS Permanent Magnetic Materials Database (TCPMAG) is a thermodynamic and properties database for applications to permanent magnetic NdFeB based alloys. It can be used for a wide range of compositions from pure Nd2Fe14B to very complex NdFeB-based commercial permanent magnetic materials. It can be used for calculating phase diagrams and thermodynamic properties of assessed systems, but also for predicting phase equilibria, curie temperatures and simulating solidification processes for a wide range of composition.

The database enables the underlying thermodynamics and phase equilibria of these systems to be predicted as a function of the chemical composition of the magnets and temperature. Through such calculations, the database can be used to accelerate the design of new permanent magnetic NdFeB based alloys as well as improve understanding of their processing and in-service behavior.

In addition to thermodynamic data, it has thermophysical properties data available for:      

  • Molar volume of liquid and all solid phases
  • Viscosity of liquid
  • Surface tension of liquid

TCPMAG2 Thermophysical Properties

TCS Permanent Magnetic Materials Database (TCPMAG) can be used with Thermo-Calc and all available SDKs. The database does not currently have a corresponding mobility database. It also cannot be used with the Additive Manufacturing (AM) Module.

There are examples available to both demonstrate the validation of the database and to showcase the types of calculations that can be used for different materials or application area.

About the Database Examples

The TCS Permanent Magnetic Materials Database (TCPMAG) enables predictions (such as multicomponent phase equilibria calculations, equilibrium solidification simulations, and Scheil solidification simulations) to be made for multicomponent systems and alloys of industrial importance. This means it can be used to extrapolate to higher-order systems by combining several critically assessed systems.

Use the database to calculate the following, based on your actual alloy chemistry:

  • Thermophysical properties, such as:
    • Specific heat, enthalpy, latent heat, and molar volume (for all phases), and the viscosity and surface tension (of liquid only)
  • Phase-based properties, such as:
    • Critical transformation temperatures such as solvus temperatures of precipitates, amounts and compositions of phases, solubility limits, activities, phase diagrams, and more
  • Equilibrium and non-equilibrium solidification, such as:
    • Liquidus, solidus, incipient melt temperatures, freezing range, fraction solid curves, solidification path, fraction eutectic, microsegregation, partition coefficients, latent heat, shrinkage, and more
  • Curie temperature

It is possible to combine several databases to make calculations using Thermo‑Calc. For more information related to a specific type of problem, contact one of our support specialists at info@thermocalc.com. The experts are available to make recommendations on the most suitable database to use for your needs.

TCPMAG: TCS Permanent Magnetic Database Revision History. The current version of the database is TCPMAG2. See the link for any subversion release details.