Dual-site cationic disorder engineering for ultralow amorphous-like thermal conductivity in thermal barrier coatings

Key Points

• This research aims to explore the effects of dual-site cationic disorder on thermal conductivity in high-entropy pyrochlore oxides.
• Investigated high-entropy pyrochlore oxides with Y3+ occupancy at A and B sites.
• Analyzed thermophysical properties and lattice disorder.
• Tailored the thermal conductivity through material composition adjustments.
• Induced lattice disorder led to ultralow thermal conductivity values.
• Thermophysical properties were significantly adjustable based on Y3+ site occupancy.
• Demonstrated potential for optimized thermal barrier coatings.