Full
Outline
With the development of aero-engine technology， the rising operating temperature makes the service environment of environmental barrier coatings （EBCs） increasingly severe， imposing higher demands on their comprehensive performance. EBCs have evolved from the first-generation mullite/YSZ system to the fourth-generation thermal/environmental barrier coatings （T/EBCs）， among which rare-earth silicates have become a research hotspot owing to their excellent high-temperature stability and matched thermal expansion coefficient. This paper reviews typical EBCs preparation processes including APS， EB-PVD and PS-PVD， analyses the influence of process parameters on coating quality， and elaborates the typical failure mechanisms under water-vapor corrosion， CMAS attack and thermal cycling stress. Future development of EBCs will focus on high-entropy materials， multi-scale structural design and intelligent process optimization to further improve their service performance and lifetime.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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