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Spectroscopic Analysis of HVOF-Sprayed Al2O3-40%TiO2 Coatings for Solar Thermal Applications

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Abstract:

This paper presents an in-depth spectroscopic analysis of Al2O3-40%TiO2 coatings deposited via HVOF thermal spraying on a 10CrMo9.10 heat-resistant steel substrate. The study aims to correlate the optoelectronic and structural properties of the coatings with their composition and microstructure. Spectroscopic investigations revealed intense absorption in the visible (VIS) region due to electronic transitions from the valence band to the conduction band of the ceramic materials and high reflectivity in the ultraviolet (UV) region. These properties make the coatings particularly useful for protective systems in solar thermal power plants. The detailed characterization of the optical properties of the Al2O3-40%TiO2 coatings obtained through HVOF technology was made possible by corroborating spectroscopic results. These insights are essential for understanding the mechanisms that govern the performance of these coatings in protective applications under high temperatures and aggressive environments.

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Periodical:

Solid State Phenomena (Volume 379)

Pages:

59-67

DOI:

https://doi.org/10.4028/p-eQ5hTP

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Online since:

November 2025

Authors:

Claudia Amalia Ciurel*, Alin Constantin Murariu, Anca Lidia Borz

Keywords:

Absorption, HVOF Coatings, Optoelectronic Properties, Reflectance, UV-VIS Spectroscopy

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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