Investigation of Peritectic Solidification Morphologies by Using the Binary Organic Model System TRIS-NPG.

Area of Science:

• Materials Science
• Solidification Science
• Crystallography

Background:

• Peritectic solidification, typically layered under diffusive conditions, becomes complex due to thermo-solutal convection.
• Real-world solidification involves competitive phase growth, leading to intricate morphologies.
• Binary organic systems like Tris-(hydroxylmenthyl) aminomethane-(Neopentylglycol) serve as transparent models for metal-like solidification.

Purpose of the Study:

• To investigate the dynamic solid/liquid interface behavior during peritectic solidification.
• To characterize complex peritectic solidification morphologies arising from competitive growth.
• To correlate experimental observations with numerical simulations for a deeper understanding.

Main Methods:

• Utilized the Bridgman technique to control solidification conditions.
• Employed transparent organic materials (Tris-(hydroxylmenthyl) aminomethane-(Neopentylglycol)) for in-situ observation.
• Performed numerical simulations to interpret solidification patterns.

Main Results:

• Observed complex peritectic solidification morphologies driven by competitive growth.
• Identified various morphologies under different growth conditions, influenced by thermo-solutal convection.
• Demonstrated the influence of non-planar solidification on morphology development.

Conclusions:

• Thermo-solutal convection significantly impacts peritectic solidification, leading to complex, non-layered structures.
• Transparent model systems combined with Bridgman growth and numerical analysis provide powerful insights into solidification dynamics.
• Understanding these competitive growth phenomena is crucial for controlling material structures and properties.