Tuning the structural and mechanical properties in ZrO2-SiO2 binary system through Y3 + inclusions

Highlights: • Yttrium additions to ZrO₂-SiO₂ binary system induce t- → c-ZrO₂ phase transition. • Yttrium prefers to occupy the ZrO₂ lattice. • Amorphous nature of SiO₂ is preserved until 1200 °C. • Yttrium induces improved thermal and mechanical stability of ZrO₂-SiO₂ binary system. - Abstract: The present investigation explores the influence of yttrium (Y³⁺) inclusions in ZrO₂-SiO₂ binary system (YSZ) on its structural and mechanical features. The powders were synthesized through sol-gel technique and an exclusive characterization were undertaken to investigate the structural and mechanical features influenced by Y³⁺ additions. Characterization techniques affirmed the crucial role of Y³⁺ on the resultant structural and thermal stability of the YZS system. Instrumented indentation inferred the enhanced mechanical properties demonstrated by YZS system in comparison with pure ZrO₂–SiO₂ binary system (ZS).