2023
DOI: 10.1111/jace.19077
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New class of high‐entropy rare‐earth niobates with high thermal expansion and oxygen insulation

Abstract: Tailoring the structure and properties of materials using the high-entropy (HE) effect is of significant interest in the fields of environmental and thermal barrier coatings (TBCs). In this work, a new class of dense HE rare-earth niobates was successfully prepared by a solid-phase reaction method, including (Sm

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Cited by 42 publications
(7 citation statements)
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“…The intricate crystal structure and configurational entropy stemming from the doping of six principal elements in (La 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )NbO 4 is analog to high entropy zirconates, resulting in ultradense dislocations. These ultradense dislocation networks interact extensively with cracks, 35–37 facilitating crack deflection and bridging in high entropy (La 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )NbO 4 ceramic, as confirmed in Figure 11E,F. In contrast, these phenomena are not observed in YNbO 4 .…”
Section: Discussionmentioning
confidence: 81%
“…The intricate crystal structure and configurational entropy stemming from the doping of six principal elements in (La 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )NbO 4 is analog to high entropy zirconates, resulting in ultradense dislocations. These ultradense dislocation networks interact extensively with cracks, 35–37 facilitating crack deflection and bridging in high entropy (La 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Y 0.2 )NbO 4 ceramic, as confirmed in Figure 11E,F. In contrast, these phenomena are not observed in YNbO 4 .…”
Section: Discussionmentioning
confidence: 81%
“…As 𝑣 𝑚 remains largely unaffected by temperature, the variation in thermal diffusivity primarily stems from temperature dependence Ʌ. The average Ʌ is calculated through various phonon scattering mechanisms, as demonstrated in Equation ( 8) [38,43,44].…”
Section: J U S T a C C E P T E Dmentioning
confidence: 99%
“…Specically, these compounds demonstrate metallic characteristics specically for electrons possessing a distinct spin. [20][21][22] Literature shows that half-Heusler compounds exhibit several characteristics that make them promising for thermoelectric applications. [23][24][25] Researchers have been actively studying various compositions and doping strategies to optimize their thermoelectric properties further.…”
Section: Introductionmentioning
confidence: 99%