Enhancing Wettability of Cu₃P/Cu Systems through Doping with Si, Sn, and Zr Elements: Insights from First Principles...

Area of Science:

• Materials Science
• Computational Materials Science
• Surface Science

Background:

• Understanding the wetting mechanism of copper-phosphorus (Cu-P) brazing materials on copper is crucial for advanced joining applications.
• Existing knowledge on interfacial bonding and wettability in the Cu3P/Cu system requires further fundamental investigation.

Purpose of the Study:

• To elucidate the wettability mechanism of Si, Sn, and Zr doping on the interfacial bond strength of the Cu3P/Cu system.
• To provide theoretical insights into enhancing the wettability of Cu-P brazing materials through additive elements.

Main Methods:

• First-principles calculations were employed to study the Cu3P/Cu interface.
• Analysis included determining interfacial structure, work of adhesion (Wad), charge density difference, and density of states (DOS).

Main Results:

• Calculated results demonstrate that Si, Sn, and Zr doping effectively improve wettability at the Cu3P/Cu interface.
• Zr doping showed particularly significant improvements in wettability and interfacial bond strength.
• The study validated results through multiple calculation sets to ensure accuracy.

Conclusions:

• Doping with Si, Sn, and Zr elements offers a viable strategy to enhance the wettability of the Cu3P/Cu system.
• Zr is identified as a highly effective dopant for improving interfacial properties in Cu-P brazing.
• These findings provide a theoretical basis for designing improved Cu-P brazing materials.