Chromium Luminescence in Plasma Electrolytic Oxidation Coatings on Aluminum Surface

With plasma electrolytic oxidation (PEO), one can easily obtain thick (tens of microns), mechanically resilient and chemically stable oxide coating on aluminum other valve metal alloys. The study luminescent PEO coatings is a relatively new subfield the already well-established preparation methods. In recent years, many luminescence-based approaches have been developed, which detection ionizing radiation carbon-doped alumina coating. This presents an improved approach by doping with chromium using citric acid as additive in electrolyte. Trivalent ions replacing crystalline lattice exhibit characteristic sharp lines luminescence spectrum. effectiveness different DC voltages, process times concentrations electrolyte were examined. use also provides conditions required for formation energy trap bandgap material, thus opening up possibility to be used detector measuring its thermoluminescence. Chromium atoms are incorporated from Al6082 alloy itself not added electrolyte, therefore making much more reliable, repeatable, environmentally friendly.