About the MOBNB1: TCS Nb-based Alloys Mobility Database

Niobium-based alloys find applications in various industries due to their unique properties. They are commonly used in aerospace and aviation industries for manufacturing superalloys, which are heat-resistant and can withstand high-stress environments, such as jet engines and gas turbines. Niobium-based alloys are also used in medical implants due to their biocompatibility and corrosion resistance. Additionally, these are used in the production of superconductors for applications like MRI machines and particle accelerators. In the automotive sector, Nb-based alloys are used for lightweighting and improving the strength of structural components.

The TCS Nb-based Alloys Mobility Database (MOBNB) is a kinetic database containing atomic mobility data for Nb-based refractory alloys. The database is compatible and primarily recommended for use with the most recent version of the TCS Nb-based Alloys Database (TCNB) (i.e. TCNB1).

The Nb-based alloys thermodynamic and kinetic databases (i.e. TCNB1 and MOBNB1) are available for refractory alloys (Nb-based) that exhibit high melting temperature and low density compared to Ni-superalloys. Together the databases can be used to study the influence of alloying by the addition of elements on various properties.

The MOBNB1 database provides the kinetic data for those working with the Add-on Modules—the Diffusion Module (DICTRA) and the Precipitation Module (TC-PRISMA). It can also be used together with the Thermo‑Calc Software Development Kits (SDKs).

When the kinetic database is used with the Diffusion Module (DICTRA), and a thermodynamic database for Nb-based alloys (e.g. TCNB1), you can study diffusion-controlled phenomena in Nb/substrate systems, such as solidification, growth of interfacial compounds, dissolution of substrates, interdiffusion, and much more. Similarly, when used with the Precipitation Module (TC-PRISMA) it is suitable to simulate concurrent nucleation, growth, and coarsening of precipitates in Nb alloys.

The CALPHAD Method

The Thermo‑Calc databases are developed with the CALPHAD approach based on various types of experimental data and theoretical values (e.g. those from first-principles calculations). It is based on the critical evaluation of binary, ternary, and for some databases, important higher order systems. This enables predictions to be made for multicomponent systems and alloys of industrial importance. Among these, the thermodynamic database is of fundamental importance.

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

Additional Resources

Go to the Niobium-based Alloys Databases page on our website where you can access this Technical Information plus learn more about the compatible thermodynamic database and its Validation and Calculation Examples Collection.