High-temperature performance of thermal environmental barrier coatings in 90%H2O-10%O2 conditions at 1475 °C
Source abstract
Abstract
The performance of 50HfO 2-50SiO 2/Y xYb (2−x)Si 2O 7 thermal environmental barrier coating prepared using atmospheric plasma spraying was investigated in the Al 2O 3 tube furnace in 90%H 2O-10%O 2 conditions at 1475 °C. The results showed that Y xYb (2−x)Si 2O 7 layer was contaminated by alumina impurities during the testing process. The thermally grown oxide layer was formed at the bond coat/SiC interface, it grew as the cycles increased. Furthermore, the (Y/Yb) 2O 3-HfO 2 solid solution with a higher coefficient of thermal expansion was formed at Y xYb (2−x)Si 2O 7/50HfO 2-50SiO 2 interface. The horizontal cracks were the principal factor that caused the failure of 50HfO 2-50SiO 2/Y xYb (2−x)Si 2O 7. 50HfO 2-50SiO 2/Y xYb (2−x)Si 2O 7 protected SiC for 25 cycles in steam conditions.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · High-Temperature Coating Behaviors · Semiconductor materials and devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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