English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Using fluorite oxides as an example, this study broadens high-entropyceramics (HECs) to compositionally-complex ceramics (CCCs) or multi-principalcation ceramics (MPCCs) to include medium-entropy and/or non-equimolarcompositions. Nine compositions of compositionally-complex fluorite oxides(CCFOs) with the general formula of (Hf1/3Zr1/3Ce1/3)1-x(Y1/2X1/2)xO2-delta (X= Yb, Ca, and Gd; x = 0.4, 0.148, and 0.058) are fabricated. The phasestability, mechanical properties, and thermal conductivities are measured.Compared with yttria-stabilized zirconia, these CCFOs exhibit increased cubicphase stability and reduced thermal conductivity, while retaining high Young'smodulus (~210 GPa) and nanohardness (~18 GPa). Moreover, thetemperature-dependent thermal conductivity in the non-equimolar CCFOs shows anamorphous-like behavior. In comparison with their equimolar high-entropycounterparts, the medium-entropy non-equimolar CCFOs exhibit even lower thermalconductivity (k) while maintaining high modulus (E), thereby achieving higherE/k ratios. These results suggest a new direction to achievethermally-insulative yet stiff CCCs (MPCCs) via exploring non-equimolar and/ormedium-entropy compositions.

From High-Entropy Ceramics to Compositionally-Complex Ceramics: A Case Study of Fluorite Oxides