Equiatomic quaternary (Y1/4Ho1/4Er1/4Yb1/4)2SiO5 silicate: A perspective multifunctional thermal and environmental barrier coating material

A multicomponent γ-type (Gd1/6Tb1/6Dy1/6Tm1/6Yb1/6Lu1/6)2Si2O7 disilicate with outstanding thermal stability

“…In this respect, we hope that the high-entropy engineering might be helpful to improve the phase stability of RE-disilicates and to promote their hightemperature performance as environmental barrier coating. Meanwhile, previous works have demonstrated that high entropy or multi-principal element rare-earth silicates are showing some balanced optimal or even extraordinarily enhanced properties compared with those single principal element disilicates, which also heralds some exciting opportunities through high entropy engineering [22,23].…”

A step forward from high-entropy ceramics to compositionally complex ceramics: a new perspective

“…In addition to two major classes high-entropy UHTCs (discussed above) that have been extensively studied in the last a few years, high-entropy nitrides [67], silicides [44,45], sulfides [98], fluorides [99], aluminides [43], hexaborides [100], carbonitrides [101], and aluminosilicides [38] have been fabricated. In the broader families of oxide-related HECs, the fabrication of high-entropy magnetoplumbites [87,102], zeolitic imidazolate frameworks [103], ferrites [104], phosphates [18,105], monosilicates [19,20], disilicates [106], and metal oxide nanotube arrays [107] have been reported. Medium-and high-entropy Compositionally Complex thermoelectrics have also been explored [40][41][42].…”

“…The hardness is typically directly related to Young's modulus (E). Interestingly, the modulus of HECs was also found to be enhanced in some cases [13,20,59,61,64,66,78]. The underlying mechanisms are unknown In defective Compositionally Complex fluorite oxides, the moduli and hardness values are comparable with YSZ despite the addition of high fractions of soft stabilizers [13].…”

Laser Floating Zone: General Overview Focusing on the Oxyorthosilicates Growth

“…Thus, they have attracted the attention of the researchers for long time, yielding different applications [2,31]. Indeed, since their discovery by Toropov et al [32], they have been applied as laser host materials [1-3, 9, 33-35], gamma ray detectors or scintillators [36], environmental barrier coatings (EBCs) [37] or, even, as waveguides [38]. The interest in this kind of compounds arose after the first study carried out by Hopkins et al [39] based on the growth of the rare earth oxyapatites.…”