Exchange of experience
| Autor: | M. V. Kolomytsev, N. A. Derenovskaya, V. D. Kurochkin, O. M. Romanenko, L. F. Kravchenko |
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| Rok vydání: | 2007 |
| Předmět: |
Glow Discharge Mass Spectrometry
Materials science Phosphorus Polyatomic ion Metals and Alloys Analytical chemistry Evaporation chemistry.chemical_element X-ray fluorescence Condensed Matter Physics Mass spectrometry chemistry Mechanics of Materials Impurity Materials Chemistry Ceramics and Composites Thermal spraying |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 46:398-403 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/s11106-007-0062-0 |
| Popis: | Phosphorus and trace impurities in aluminum phosphate powders and coatings are identified with glow-discharge mass spectrometry (GDMS), atom emission spectrometry (AES), x-ray fluorescence (XRF), and chemical analysis. Alumina powders with particles 60 to 40 µm in size that are covered with Al(PO3)3 and AlPO4 with TiO2 additives are sprayed using a supersonic air plasmatron. The distribution of elements across the coating on a steel substrate is examined with GDMS. The effect of polyatomic clusters is taken into account in determining Mg, P, S, and Ti by mathematical simulation. Phosphorus is identified with AES in a dc air arc controlled to produce similar conditions for exciting PI lines in the evaporation of test and reference (Ca3(PO4)2) samples. Comparing the results obtained by different methods shows that x-ray fluorescence reveals the concentration from the surface of nucleus-shell particles. Measurements show that some part of phosphorus is lost in spraying because orthophosphates transform into metaphosphates. |
| Databáze: | OpenAIRE |
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