Achieving Super-Metallophobicity on Silicon-based Ceramics at High Temperature.

Area of Science:

• Physical Chemistry
• Materials Science
• Surface Science

Background:

• Superwettability is a key concept in physical chemistry and materials engineering.
• High-temperature superwettability research remains largely unexplored, despite its industrial significance.

Purpose of the Study:

• To investigate high-temperature non-wetting properties of materials.
• To develop a material with superior metallophobicity for demanding applications.

Main Methods:

• Proposed a novel ceramic material, silicon carbonitride (Si₂N₂O).
• Evaluated the non-wetting performance of Si₂N₂O against various non-ferrous metals at high temperatures.
• Engineered micro-nanostructures on Si₂N₂O to enhance metallophobicity.
• Characterized wetting behavior using contact angle and contact angle hysteresis measurements.

Main Results:

• Si₂N₂O exhibits excellent high-temperature non-wetting properties against multiple non-ferrous metals.
• Micro-nanostructured Si₂N₂O achieved super-metallophobicity (contact angle >150°, hysteresis ≈0°).
• The observed super-metallophobicity is attributed to unique thermodynamic and dynamic wetting behaviors on the engineered surface.

Conclusions:

• Si₂N₂O is a promising ceramic for high-temperature applications requiring metal repellency.
• The study advances the understanding of superwettability at elevated temperatures.
• Findings provide insights for designing materials with super-metallophobicity for industries like metallurgy and semiconductor manufacturing.