Improvement of high-temperature oxidation resistance of titanium-based alloy by sol–gel method
Source abstract
Abstract
Sol–gel dip coating of SiO2 was applied on a TiAl-based alloy, and subsequent heat treatment was performed. XRD and SEM/EDS analysis revealed that an amorphous silica coating was formed on the alloy. Isothermal oxidation and cyclic oxidation at 600 and 700 °C in static air of the specimens with or without coating were performed to investigate the effect of the SiO2 coating on the oxidation behavior of the alloy by thermogravimetry. The average parabolic rate constants of the coated specimens were greatly reduced due to the presence of the coating. Severe cracks and spallation of the scales were observed on the blank specimens, but not on the coated ones. The oxide scales formed on the uncoated specimens were stratified. For the coated samples, a mixture layer of rutile TiO2 and Al2O3 occurred beneath the applied film.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · High-Temperature Coating Behaviors · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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