Mechanical properties and calcium-magnesium-alumino-silicate (CMAS) corrosion behavior of a promising Hf6Ta2O17 ceramic for thermal barrier coatings

Effects of Ta2O5 content on mechanical properties and high‐temperature performance of Zr6Ta2O17 thermal barrier coatings

“…This implies that ZrO 2 has not completely reacted with Ta 2 O 5 . It needs to be heat‐treated to make it react completely 26 . Figure 2B shows the XRD patterns of the heat‐treated Zr 6 Ta 2 O 17 ceramic coating with different Ta 2 O 5 content.…”

“…Due to the porous and multi‐gap of Zr 6 Ta 2 O 17 /YSZ double ceramic top coating, the dispersion of mechanical properties is inevitable. Therefore, the scatter of hardness and elastic modulus were obtained with the aid of Weibull analysis 26 …”

Thermal performance regulation of high‐entropy rare‐earth disilicate for thermal environmental barrier coating materials

“…SiC‐based ceramic matrix composites (CMCs) are explored for a candidate material that can replace superalloy as the hot‐section components of aeroengines, due to their low density and various excellent thermal, chemical and mechanical properties, 1,2 However, SiC‐based CMCs are susceptible to water vapor corrosion at high temperature, which will reduce their service life in practical applications 3,4 . Therefore, it is necessary to prepare a thermal environmental barrier coating (TEBC) for protecting the SiC‐based CMCs, and the TEBCs are expected to demonstrate both good thermal insulation and environmental isolation 5–8 .…”

“…SiC-based ceramic matrix composites (CMCs) are explored for a candidate material that can replace superalloy as the hot-section components of aeroengines, due to their low density and various excellent thermal, chemical and mechanical properties, 1,2 However, SiC-based CMCs are susceptible to water vapor corrosion at high temperature, which will reduce their service life in practical applications. 3,4 Therefore, it is necessary to prepare a thermal environmental barrier coating (TEBC) for protecting the SiC-based CMCs, and the TEBCs are expected to demonstrate both good thermal insulation and environ-mental isolation. [5][6][7][8] Rare-earth disilicates are the potential candidate materials for TEBCs due to their excellent hightemperature stability, corrosion resistance to water vapor and molten calcium-magnesium-aluminosilicate (CMAS) and coefficient of thermal expansion (CTE) matching with SiC-based CMCs, but the relatively weak insulation performance limits their practical application as TEBCs.…”

Reaction products of Sm2Zr2O7 with calcium-magnesium-aluminum-silicate (CMAS) and their evolution

“…that may be ingested by an engine [3,4]. These molten silicates, commonly referred to as calcium-magnesium-aluminum-silicate (CMAS), cause severe degradation of TBCs and premature delamination, exposing the metallic components to dangerous hot gases [5][6][7].…”