A multidisciplinary study on magnesium
During plasma electrolytic oxidation of a magnesium alloy (96% Mg, 3% Al, 1% Zn) we obtained a luminescence spectrum in the wave number range between 19 950 and 20 400 cm-1. The broad peak with clearly pronounced structure was assigned to the v’-v” = 0 sequence of the B 1Σ+ → X 1Σ+ electronic tra...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2012-01-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2012/0352-51391200105R.pdf |
| _version_ | 1818387156430749696 |
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| author | Radić-Perić Jelena Perić Miljenko Kasalica Bećko Krmar Marija Stojadinović Stevan Sarvan Mirjana Ranković Radomir |
| author_facet | Radić-Perić Jelena Perić Miljenko Kasalica Bećko Krmar Marija Stojadinović Stevan Sarvan Mirjana Ranković Radomir |
| author_sort | Radić-Perić Jelena |
| collection | DOAJ |
| description | During plasma electrolytic oxidation of a magnesium alloy (96% Mg, 3% Al, 1% Zn) we obtained a luminescence spectrum in the wave number range between 19 950 and 20 400 cm-1. The broad peak with clearly pronounced structure was assigned to the v’-v” = 0 sequence of the B 1Σ+ → X 1Σ+ electronic transition of MgO. Quantum-mechanical perturbative approach was applied to extract the form of the potential energy curves for the electronic states involved in the observed spectrum, from the positions of spectral bands. These potential curves, combined with the results of quantum-chemical calculations of the electric transition moment, were employed in subsequent variational calculations to obtain the Franck-Condon factors and transition moments for the vibrational transitions observed. Comparing the results of these calculations with the measured intensity distribution within the spectrum we derived relative population of the upper electronic state vibration levels. This enabled us to estimate the plasma temperature. Additionally, the temperature was determined by analysis of the recorded A 2Σ+ (v’ = 0) - X 2П (v” = 0) emission spectrum of OH. The composition of plasma containing magnesium, oxygen, and hydrogen under assumption of local thermal equilibrium was calculated in the temperature range up to 12 000 K and for pressures of 105, 106, 107, and 108 Pa, in order to explain the appearance of the observed spectral features and to contribute to elucidation of processes taking place during the electrolytic oxidation of Mg. [Projekat Ministarstva nauke Republike Srbije, br. 172040] |
| first_indexed | 2024-12-14T04:05:28Z |
| format | Article |
| id | doaj.art-0861d79320524fe498704a77bf260f85 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-12-14T04:05:28Z |
| publishDate | 2012-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-0861d79320524fe498704a77bf260f852022-12-21T23:17:50ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392012-01-0177111483152810.2298/JSC120912105RA multidisciplinary study on magnesiumRadić-Perić JelenaPerić MiljenkoKasalica BećkoKrmar MarijaStojadinović StevanSarvan MirjanaRanković RadomirDuring plasma electrolytic oxidation of a magnesium alloy (96% Mg, 3% Al, 1% Zn) we obtained a luminescence spectrum in the wave number range between 19 950 and 20 400 cm-1. The broad peak with clearly pronounced structure was assigned to the v’-v” = 0 sequence of the B 1Σ+ → X 1Σ+ electronic transition of MgO. Quantum-mechanical perturbative approach was applied to extract the form of the potential energy curves for the electronic states involved in the observed spectrum, from the positions of spectral bands. These potential curves, combined with the results of quantum-chemical calculations of the electric transition moment, were employed in subsequent variational calculations to obtain the Franck-Condon factors and transition moments for the vibrational transitions observed. Comparing the results of these calculations with the measured intensity distribution within the spectrum we derived relative population of the upper electronic state vibration levels. This enabled us to estimate the plasma temperature. Additionally, the temperature was determined by analysis of the recorded A 2Σ+ (v’ = 0) - X 2П (v” = 0) emission spectrum of OH. The composition of plasma containing magnesium, oxygen, and hydrogen under assumption of local thermal equilibrium was calculated in the temperature range up to 12 000 K and for pressures of 105, 106, 107, and 108 Pa, in order to explain the appearance of the observed spectral features and to contribute to elucidation of processes taking place during the electrolytic oxidation of Mg. [Projekat Ministarstva nauke Republike Srbije, br. 172040]http://www.doiserbia.nb.rs/img/doi/0352-5139/2012/0352-51391200105R.pdfmagnesium alloyplasma electrolytic oxidationgalvanoluminescenceB 1Σ+ → X 1Σ+ electronic transition of MgOperturbative and variational quantum-mechanical methodsab initio quantum-chemical calculationscomputation of plasma composition |
| spellingShingle | Radić-Perić Jelena Perić Miljenko Kasalica Bećko Krmar Marija Stojadinović Stevan Sarvan Mirjana Ranković Radomir A multidisciplinary study on magnesium Journal of the Serbian Chemical Society magnesium alloy plasma electrolytic oxidation galvanoluminescence B 1Σ+ → X 1Σ+ electronic transition of MgO perturbative and variational quantum-mechanical methods ab initio quantum-chemical calculations computation of plasma composition |
| title | A multidisciplinary study on magnesium |
| title_full | A multidisciplinary study on magnesium |
| title_fullStr | A multidisciplinary study on magnesium |
| title_full_unstemmed | A multidisciplinary study on magnesium |
| title_short | A multidisciplinary study on magnesium |
| title_sort | multidisciplinary study on magnesium |
| topic | magnesium alloy plasma electrolytic oxidation galvanoluminescence B 1Σ+ → X 1Σ+ electronic transition of MgO perturbative and variational quantum-mechanical methods ab initio quantum-chemical calculations computation of plasma composition |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2012/0352-51391200105R.pdf |
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