Abnormal phase evolution and degradation behavior of Al-Si coating during 30,000 h aging
Source abstract
Abstract
Degradation behavior of silicon-modified aluminide coating over 30,000 h aging at 650 ℃ was investigated. Significant microstructural evolutions, abnormal elemental distribution and newly-formed secondary internal oxides were observed after prolonged aging. As the aging time extended from 10,000 h to more than 20,000 h, interdiffusion induced the formation of α-Fe/AlNi/α-Fe structure, while the AlNi precipitates gradually replaced the Fe-rich matrix by acting as Al source for the formation of surface alumina scale. Based on the microstructural evolutions, a new regime of coating degradation involving both the transitions of diffusion mode and oxidation mechanism is proposed.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Semiconductor materials and devices · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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