Autors: Mihalev, M. S., Hardalov, C. M., Christov, C. G., Leiste, H.
Title: Microstructural Characterization of Thin Laser Bonded Coatings based on Transitional Metal Oxides Powder
Keywords: laser, laser bonding, transition metal oxide, catastrophic o

Abstract: Laser bonding is a process of preparing coatings of oxides powder, mainly from transition metals, which are irradiated by a power laser. The oxide powder undergoes different physical and chemical transitions and a layer over the substrate with different optical and microstrucural properties is produced. In this work a coating of MoO3 has been produced by laser bonding. Micro-Raman scattering and X-Ray Powder Diffraction (XRD) have been used to estimate the chemical compound of the produced coatings, as well as their microstructure phases. It has been demonstrated that in addition the initial a-orthorhombic MoO3 the monoclinic b-phase is observed. The chemical compound undergoes also changes – in both spectra (Raman and XRD) the presence of new less-stable oxide Mo4O11 can be found, but no MoO2 in every structural form. The results obtained show, that new oxides appear. The new oxides build stable chemical bond to the substrate and have complex catalytic an re-oxidation properties.


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XXIII National scientific symposium with international participation Metrology and Metrology Assurance 2013, September 9-13, 2013, Sozopol, Bulgaria: Proceedings, pp. 219-225, 2013, Bulgaria,

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