Thermal corrosion behavior of Yb4Hf3O12 ceramics exposed to calcium-ferrum-alumina-silicate (CFAS) at 1400 °C

Capacitive properties of carbon nanofibers derived from blends of cellulose acetate and polyacrylonitrile

“…The phase and crystallographic structure of the materials were examined via X-ray diffraction (XRD; Rigaku, Japan) with Cu Ka radiation (l = 0.15406 Å) at 2y = 5-801 with a scanning speed of 101 min À1 . 43,44 The structure of the composite films was studied using laser Raman spectroscopy (Themor, DXR532, USA). The surface elemental composition of the samples was analyzed using an X-ray photoelectron spectrometer (XPS; Shimadzu, UK).…”

Interaction and infiltration behavior between calcium–ferrum–alumina–silicate and Yb4Hf3O12 ceramics at various temperatures

“…The syntheses of CFAS powders and testing methodology were similar to previous studies 40–42 . CFAS with a composition of 33CaO–10FeO x –13AlO 1.5 –44SiO 2 was used in this study.…”

“…The syntheses of CFAS powders and testing methodology were similar to previous studies. [40][41][42] CFAS with a composition of 33CaO-10FeO x -13AlO 1.5 -44SiO 2 was used in this study. The raw materials were weighed and mixed in a appropriate molar ratio, and then ball-milled for 24 h using deionized water as a medium, followed by completely drying at 80 • C for 8 h. Subsequently, the dried mixtures were heat treated at 1500 • C for 4 h to form CFAS glass.…”

SiC modified self‐healing ytterbium disilicate materials for potential environmental barrier coating application

“…Therefore, in this work, we propose to introduce SiC second phase as a self‐healing agent to the ytterbium silicate ceramics 21,22,24,25 . To gain some guidance for the design and fabrication of future real self‐healing EBCs, the bulk ceramics are fabricated and studied composing of Yb 2 Si 2 O 7 and Yb 2 SiO 5 as well as SiC self‐healing agents in the forms of both particles and whiskers with various sizes and different contents.…”

“…Therefore, in this work, we propose to introduce SiC second phase as a self-healing agent to the ytterbium silicate ceramics. 21,22,24,25 To gain some guidance for the design and fabrication of future real self-healing EBCs, the bulk ceramics are fabricated and studied composing of Yb 2 Si 2 O 7 and Yb 2 SiO 5 as well as SiC self-healing agents in the forms of both particles and whiskers with various sizes and different contents. The introduction of Yb 2 SiO 5 has been aimed to reflect the real scenario of silicon depletion for disilicate EBCs as a result of both silicon selective evaporation during air plasma spraying (APS) due to its high saturated evaporation pressure and the dragging out effect of silicon in disilicates by water vapor during service.…”