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1
Content available Influence of Electrolytical Oxidising of Silumine Surfaces on the Quality of Bonding with Epoxy Resin
Posmyk A., Cholewa M., Wieczorek J., Scelina D.
Archives of Metallurgy and Materials
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2016
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Vol. 61, iss. 3
1601--1606
EN
The article presents the preparation process of AC-AlSi12 aluminum alloy surface by application of anodic oxidation method. The method enables the formation of a porous oxide layer (Al2O3) which generates the substrate of durable adhesive bond with an epoxy resin. It also presents the influence of the form of silicon precipitates in the modified alloy upon anodizing process, uniform structure and thickness of the oxide layer as well as the topography of its surface which is expected to improve adhesion of the resin and silumin. The paper describes how the position of oxidized surface against the negative electrode influences the coating structure. The studied silumins are intended to form the material for casting of 3 dimensional objects whose parts will change the distribution of electric field strength that may cause non-uniform structure of the coating.
2
Content available remote Wytrzymałość na ściskanie kompozytów AlSi11/beton z polimerem siarkowym
Cholewa M., Scelina D., Dulęba A.
Przetwórstwo Tworzyw
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2012
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[R.] 18, nr 3
174-178
PL
W pracy przedstawiono wyniki badań wytrzymałościowych na ściskanie. Celem badań było określenie wpływu zastosowanego polimeru siarkowego jako wypełniacza aluminiowego odlewu szkieletowego na własności wytrzymałościowe otrzymanego kompozytu AlSi11/beton z polimerem siarkowym. W ramach pracy wykonano badania wytrzymałościowe otrzymanych materiałów.
EN
In this paper the results of compressive strength testing were shown. The aim of this study was to determine the effect of the sulfur polymer applied as a filler of the aluminum skeletal casting on the mechanical properties of the resulted AlSi11/sulfur polymer composites. In this work a number of the mechanical tests, of the obtained materials were done.
3
Content available The influence of the forced movement of components on the structure in fabricated AlSi/CrxCy composite castings
Dulęba A., Cholewa M., Scelina D.
Archives of Foundry Engineering
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2012
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Vol. 12, iss. 1
25-32
EN
Fabrication and microstructure of the AlSi11 matrix composite containing 10 % volume fraction of CrFe30C8 particles were presented in this paper. Composite suspension was manufactured by using mechanical stirring. During stirring process the temperature of liquid metal, time of mixing and rotational speed of mixer were fixed. After stirring process composite suspension was gravity cast into shell mould. The composites were cast, applying simultaneously an electromagnetic field. The aim of the present study was to determine the effect of changes in the frequency of the current power inductor on the morphology of the reinforcing phase in the aluminum matrix. The concept is based on the assumption that a chromium-iron matrix of CrFe30C8 particles dissolves and residual carbide phases will substantially strengthen the composite. The microstructure and interface structure of the AlSi11/CrFe30C8 composite has been studied by optical microscopy, scanning microscopy and X-ray diffraction.
4
Content available Quantitative analysis of reinforcing phase in AlSi11/CrFe30C8 composite castings
Dulęba A., Scelina D., Cholewa M.
Archives of Foundry Engineering
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2011
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Vol. 11, iss. 3 spec.
49--56
EN
In this paper assessment of the morphology and segregation of the reinforcing phase based on optical quantitative analysis was achieved. Microscopic observation of AlSi11/CrFe30C8 composite gravity castings was carried out in electromagnetic field. The purpose of investigation was the analysis of current frequency influence supplying the inductor of electromagnetic field on segregation, quantity and morphology of reinforcement phase in aluminum matrix composite. Technological conception of investigations was based on assumption that chromium-iron matrix of particles dissolved in aluminum composite matrix and carbide phases became actual reinforcement of the composite. Gravity segregation was analyzed. Graphs containing distribution of reinforcing phase in metal matrix were shown.
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