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[85780] Artykuł: MICROSTRUCTURAL ANALYSIS OF THE SURFACE LAYERS OF THE AZ91D ENRICHED WITH AL AND SI BY THERMOCHEMICAL TREATMENTCzasopismo: 27th International Conference On Metallurgy And Materials (metal 2018) Strony: 1181-1187ISBN: 978-80-87294-84-0 Wydawca: TANGER LTD, KELTICKOVA 62, SLEZSKA, OSTRAVA 710 00, CZECH REPUBLIC Opublikowano: 2018 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Materiały z konferencji międzynarodowej (zarejestrowane w Web of Science) Punkty MNiSW: 15 Klasyfikacja Web of Science: Proceedings Paper ![]() Keywords: Magnesium alloy  thermochemical treatment  diffusion  surface layer  microstructure  |
Surface layers enriched with Al and Si were fabricated on an AZ91D substrate using thermochemical treatment in solid media. The AZ91D specimens were heated in an Al+Si powder mixture acting as a source of diffusion elements. Two temperatures were applied: 430 degrees C and 445 degrees C. The microstructural characterization of the layers was performed using an optical microscope and a scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (EDS). The layer produced at 430 degrees C had a thickness of 50 mu m; the structure was composed of intermetallic Mg17Al12 and Al3Mg2 phases and an Mg2Si phase. When a higher temperature (445 degrees C) was used, the layer was much thicker (600 mu m) and the structure was predominantly a eutectic (an Mg17Al12 intermetallic phase + a solid solution of Al in Mg) with agglomerates of Mg2Si phase particles distributed over the eutectic matrix.