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Permanent Magnetic Materials Database

TCPMAG3 is our thermodynamic and properties database designed for use with rare earth permanent magnetic materials.

Technical Information Sheet for TCPMAG3

Validation and Calculation Examples for TCPMAG3

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TCPMAG3 Quick Overview

  • PROPERTIES:
    • Gibbs Energy
      • Volume
        • Viscosity of liquid
          • Surface tension of liquid
            • Electrical resistivity
              • Thermal conductivity
              • ELEMENTS: Al, B, Ce, Co, Cu, Dy, Fe, Ga, Gd, Ho, La, Nb, Nd, Pr, Si, Sm, Tb, Zn, Zr
              • ASSESSED PHASES: 263

Permanent Magnetic Materials Database

TCPMAG3 is a thermodynamic and properties database for applications to a wide range of rare earth permanent magnet compositions from pure Nd2Fe14B to very complex NdFeB-based and SmCo-based commercial permanent magnetic materials. 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 and SmCo based alloys as well as improve understanding of their processing and in-service behavior. For example, the database can be used to enhance the sintering of magnet alloys, improve both the intrinsic coercivity and the hot workability of alloys, enhance the temperature coefficient, and improve grain refinement.

TCPMAG3 was developed to be used with our entire suite of products: Thermo-Calc, the Add-on Modules, and all available SDKs.

TCPMAG3 does not currently have a corresponding mobility database.

Highlights of the Latest Releases

The latest version of our Permanent Magnetic Materials Database, TCPMAG3, was released with Thermo-Calc 2026a, in January 2026. Read the Release Notes for more details. The new version includes:

  • 10 new elements: Al, Cu, Ga, Gd, Ho, Nb, Si, Sm, Zn, Zr (19 total)
  • 209 new phases (263 total)
  • 102 new binary systems assessed (138 total)
  • 29 new ternary systems assessed (58 total)
  • Adds electrical resistivity and thermal conductivity
  • Several improvements to viscosity and surface tension
  • The TCPMAG3 has extended its usage to include the SmCo-type permanent magnets, with the addition of Sm-related binary and ternary systems. 
  • New elements have been added to the database to broaden the potential applications of novel rare-earth-based permanent magnetic materials. Al, Cu, and Zn can enhance the sintering of the magnet alloys; Ga improves both the intrinsic coercivity and the hot workability of the alloy; Gd addition enhances the temperature coefficient; and Nb is for grain refinement. 

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