Abstract
A novel multilayer nanostructured TiC–ZrB2/ZrB2/Al2O3 solar absorber coating has been developed for Concentrated Solar Power. The TiC–ZrB2 and ZrB2 work as the absorptance layers. The SS/TiC–ZrB2/ZrB2/Al2O3 solar absorber coatings exhibit a high spectral selectivity of 0.92/0.10. The sample is annealed in vacuum to test the thermal stability. After keeping the as-deposited samples and the samples annealed in vacuum at room temperature for two years, the coatings show different colors. Through the SEM, XPS and Raman analysis, we have discussed the corresponding failure mechanism. For the purpose of clarifying the failure mechanism more clearly, corresponding failure model is established.
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