Phase composition evolution and oxidation behavior of atmospheric plasma spraying Si and Si-HfO2 bond coats at 1300 ℃
Source abstract
Abstract
The oxidation resistance of pure Si and Si-HfO 2 bond coats with three different compositions were investigated at 1300 ℃. The pure Si bond coat is easy to crack and exfoliate due to the volume expansion of SiO 2 produced by the oxidation of Si and the transformation of β→α-cristobalite during cooling. While the 60Si-40HfO 2 bond coat has excellent oxidation resistance at 1300 ℃ for 100 h, attributed to the oxidation product HfSiO 4 consuming more SiO 2 (the thickness of thermally grown oxide is 3.08 ± 0.36 µm), which inhibits the sharp increase of thermal stress of the bond coat.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · High-Temperature Coating Behaviors · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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