Multiphysics Simulation for Efficient and Reliable Systems for Low-Temperature Plasma Treatment of Metals

Area of Science:

• Materials Science and Engineering
• Plasma Physics
• Computational Fluid Dynamics

Background:

• Plasma nitriding enhances metal surface properties like hardness and wear resistance.
• Complex geometries require advanced methods for uniform treatment.
• Multi-physical process modeling aids in understanding and optimizing plasma technologies.

Purpose of the Study:

• To develop mathematical models for coupled electromagnetic, fluid flow, and thermal processes in plasma nitriding.
• To numerically solve these models for a plasma nitriding chamber.
• To calibrate models using electrical and in situ measurements for accuracy.

Main Methods:

• Development of coupled mathematical models for plasma nitriding.
• Numerical solution using ANSYS/CFX software.
• Calibration of gas mixture electrical conductivity via electrical models and in situ measurements.

Main Results:

• Simulation and analysis of 3D fields: pressure, temperature, velocity, turbulence, current density, and voltage.
• Validated models provide insights into plasma behavior within the chamber.
• Identified key parameters influencing the plasma nitriding process.

Conclusions:

• The developed models offer a robust approach for understanding and improving plasma nitriding.
• Simulation results guide technological and constructive enhancements for plasma treatment.
• Modeling is crucial for optimizing surface engineering processes on complex metal parts.