TY - JOUR N2 - At thermal junctions of aluminium alloy castings and at points where risering proves to be difficult there appear internal or external shrinkages, which are both functionally and aesthetically inadmissible. Applying the Probat Fluss Mikro 100 agent, which is based on nano-oxides of aluminium, results in the appearance of a large amount of fine microscopic pores, which compensate for the shrinking of metal. Experimental tests with gravity die casting of AlSi8Cu3 and AlSi10Mg alloys have confirmed that the effect of the agent can be of advantage in foundry practice, leading to the production of castings without local concentrations of defects and without the appearance of shrinkages and macroscopic gas pores. Also, beneficial effect on the mechanical properties of the metal has been observed. L1 - http://journals.pan.pl/Content/88941/PDF/23_paper.pdf L2 - http://journals.pan.pl/Content/88941 PY - 2015 IS - No 4 DO - 10.1515/afe-2015-0091 KW - porosity KW - Aluminium alloys KW - Shrinkages KW - Gassing in melt KW - Pore morphology A1 - Roučka, J. A1 - Hotař, J. PB - The Katowice Branch of the Polish Academy of Sciences DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - Controlled Precipitation Gaseous Cavities in Aluminium Castings UR - http://journals.pan.pl/dlibra/publication/edition/88941 T2 - Archives of Foundry Engineering ER -