The work presents the investigation results concerning the structure of composite pressure die castings with AlSi11 alloy matrix reinforced with SiC particles. Examination has been held for composites containing 10 and 20 volume percent of SiC particles. The arrangement of the reinforcing particles within the matrix has been qualitatively assessed in specimens cut out of the castings. The index of distribution was determined on the basis of particle count in elementary measuring fields. The tensile strength, the yield point and elongation of the obtained composite were measured. Composite castings were produced at various values of the piston velocity in the second stage of injection, diverse intensification pressure values, and various injection gate width values. The regression equation describing the change of the considered arrangement particles index and mechanical properties were found as a function of the pressure die casting parameters. The infuence of particle arrangement in composite matrix on mechanical properties these material was examined and the functions of correlations between values were obtained. The conclusion gives the analysis and the interpretation of the obtained results.
 Konopka, Z. (2011). Metal cast composites. Częstochowa: Wydawnictwo Politechniki Częstochowskiej. (in Polish).
 Matthews, F. L. Rawlings, R. D. (1994) Composite Materials: Engineering and Science. Chapman and Hall.
 Metcalfe A. (1978). Interfaces in metal matrix composites, Academic Press, vol.I, Composite Materials. NY, London
 Gawroński, J. Cholewa, M. & Szajnar, J. (1994). Aluminium SiC ceramic particles composite, the technology of shape composite production. Computer Aid Design in Composite Material Technology, 321-328.
 Uhlman, D.R. & Chalmers, B. ( 1964). Interaction between particles and soli-liquid interface. Journal of Applied Physics, vol.35, 2986-2993.
 Konopka, Z. Łągiewka, M. & Zyska, A. (2005). Solidification of composite suspension during flowing in a mould. Kompozyty (Composites). 5 (4), 100-103 (in Polish).
 Fortier, A. Mechanika suspensji. Mir 1971, Moskwa.
 Nagata, S. Mixing: Principles and applications. Halsted Press 1975, New York.
 Konopka, Z. (1995). Pressure Die Cast Fibre Reinforced Al- Si Alloy Matrix Composites. In Euromat’95, 667-670, Padova.
 Konopka, Z. (2008). Gravity and pressure die casting of Al alloy matrix composites with SiC and graphite particles. Częstochowa: Wydawnictwo Politechniki Częstochowskiej. (in Polish).
 Street, A. (1997). The Diecasting Book. Portcullis Press Ltd.
 Biełopuchov A.K. i in. (1971). Pressure die casting. Problems of pressing. (Lit`je pod davlenijem. Problemy podpressovki.) Moskwa: Masinostrojenie. (in Russian).
 Gawroński J., Szajnar J., Cholewa M., & Wróbel T. (2005). Krzepnięcie i krystalizacja kompozytów z cząstkami oraz kompozytów powierzchniowych. Przegląd Odlewnictwa T.55, nr 4, 216-230.
 Doutre, D. (1993). Foundry experience in casting aluminium metal matrix composites, Trans. Amer. Found. Soc., 1001.
 Matthews, F.L. Rawlings, R.D. (1994). Composite Materials: Engineering and Science. Chapman and Hall.
 Śleziona, J. (1995). The influence of ceramic particles on solidification of Al-Si and Al2O3 composites. Archiwum Nauki o Materiałach, 1995 (2), 163-178. (in Polish).
 Rożniatowski, K. (2008). Methods of the arrangement inhomogeneity characterization of the structural elements in multiphase materials. Warszawa: Oficyna Wydawnicza Politechniki Warszawskiej. (in Polish).
 Pasieka, A. & Konopka Z. (2013). The influence of pressure die casting parameters on distribution of reinforcing particles in the AlSi11/10% SiC composite, Archives of Foundry Engineering, vol. 13 issue 3/2013, s. 64-67.