In response to the demand for the oxidation resistance of low-density Nb-Ti-Al alloy,a study was conducted on Si-Cr-Y oxidation resistant coatings.The high-temperature oxidation resistance and microstructure changes of the prepared silicon based coatings before and after oxidation were analyzed using SEM,EDS,and resistance internal heating methods.The results show that the oxidation resistance life of the coating reaches 133 hours at 1 200 ℃,and the air-cooled thermal shock at room temperature～1 200 ℃ exceeds 15 000 times;A diffusion oxygen barrier layer is formed between the coating and the substrate,ensuring the bonding strength between the coating and the substrate.In a high-temperature atmospheric environment,a SiO2 protective layer is formed on the surface of the coating to isolate oxygen,thereby demonstrating that the Si-Cr-Y coating has good antioxidant performance.
关键词
Nb-Ti-Al合金/Si-Cr-Y涂层/高温抗氧化
Key words
Nb-Ti-Al alloy/Si-Cr-Y coating/high temperature antioxidant
维普
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