Pyrolysis Kinetics-Driven Resin Optimization for Enhanced Reliability in Ceramic Vat Photopolymerization...

Area of Science:

• Materials Science
• Chemical Engineering
• Additive Manufacturing

Background:

• Thermal debinding is crucial for ceramic vat photopolymerization (VPP) success.
• Resin pyrolysis mechanisms in ceramic VPP are under-researched.
• Optimizing debinding is key for high-quality ceramic parts.

Purpose of the Study:

• To investigate resin pyrolysis kinetics in Si3N4 green bodies from ceramic VPP.
• To determine the effect of monomer functionality on pyrolysis behavior.
• To provide insights for optimizing resin formulations for enhanced debinding.

Main Methods:

• Utilized the multi-distribution activation energy model (M-DAEM).
• Employed pattern-search and local search algorithms with thermogravimetric data.
• Performed numerical analysis of internal gas pressure during debinding.

Main Results:

• Achieved high-quality global fitting (R² > 0.9999) for kinetic parameters.
• Monofunctional monomers reduced activation energy and pyrolysis temperature.
• Lowered peak gas pressure, indicating improved debinding performance.

Conclusions:

• Monofunctional monomers facilitate lower-temperature, lower-rate pyrolysis.
• This suppression of peak gas pressure enhances green body debinding quality.
• Findings offer a basis for resin formulation optimization in ceramic VPP.