Characterization of the Surface Layer of Mg Enriched with Al and Si by Thermochemical Treatment

• Autorzy: Mola R. , Stępień E. , Cieślik M.

Identyfikatory

DOI

10.1515/afe-2017-0157

• Języki publikacji: EN

Abstrakty

EN

The modified surface layers of Mg enriched with Al and Si were fabricated by thermochemical treatment. The substrate material in contact with an Al + 20 wt.% Si powder mixture was heated to 445ºC for 40 or 60 min. The microstructure of the layers was examined by OM and SEM. The chemical composition of the layer and the distribution of elements were determined by energy dispersive X-ray spectroscopy (EDS). The experimental results show that the thickness of the layer is dependent on the heating time. A much thicker layer (1 mm) was obtained when the heating time was 60 min than when it was 40 min (600 μm). Both layers had a non-homogeneous structure. In the area closest to the Mg substrate, a thin zone of a solid solution of Al in Mg was detected. It was followed by a eutectic with Mg₁₇Al₁₂ and a solid solution of Al in Mg. The next zone was a eutectic with agglomerates of Mg₂Si phase particles; this three-phase structure was the thickest. Finally, the area closest to the surface was characterized by dendrites of the Mg₁₇Al₁₂ phase. The microhardness of the modified layer increased to 121-236 HV as compared with 33-35 HV reported for the Mg substrate.

Słowa kluczowe

EN

enriched magnesium; surface modification; thermochemical treatment; layer microstructure; microhardness

PL

magnez wzbogacony; modyfikacja powierzchni; obróbka cieplno-chemiczna; mikrotwardość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 4
• Strony: 195--199
• Opis fizyczny: Bibliogr. 26 poz., rys., wykr.

Twórcy

autor

Mola R.

• Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland

autor

Stępień E.

• Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland

autor

Cieślik M.

• Kielce University of Technology, al. Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).