Dispersion of SiC particles in mechanical stirring of A356-SiC_p liquid

Abstract

In order to clarify the dispersion of SiC particles in straight-blade mechanical stirring of Al-SiC_p liquid, the dispersion of SiC particles in A356-3.5% SiC_p (volume fraction) liquid in a cylindrical crucible was studied. The relationship between rotating speed of stirrer and radial relative deviation of SiC_p content in A356 liquid between the center and the periphery of crucible was established in the conditions of 35° for the gradient angle α of blade and 10 mm/s for the speed of moving up and down of stirrer. The results show that the radial relative deviation of SiC_p content increases gradually with increasing the rotating speed of stirrer. When the rotating speed of stirrer is 200 r/min, the vertical dispersion of SiC particles in A356 liquid is even, but the radial relative deviation of SiC_p content is 0.24. Consequently, the nonhomogeneous dispersion of SiC particles in A356 liquid is mainly resulted from the nonhomogeneous radial dispersion of SiC particles.

Keywords

dispersion / straight-blade mechanical stirring / A356-SiC_p liquid

References

[1] EkiciR., ApalakM. K., YildirimM.. Effects of random particle dispersion and size on the indentation behavior of SiC particle reinforced metal matrix composites [J]. Materials and Design, 2010, 31(6): 2818-2833

[2] KumarS., BalasubramanianV.. Effect of reinforcement size and volume fraction on the abrasive wear behaviour of AA7075Al/SiC_p P/M composites-A statistical analysis [J]. Tribology International, 2010, 43(1/2): 414-422

[3] Mousavi AbarghouieS. M. R., Seyed ReihaniS. M.. Investigation of friction and wear behaviors of 2024 Al and 2024 Al/SiC_p composite at elevated temperatures [J]. Journal of Alloys and Compounds, 2010, 501(2): 326-332

[4] BozicD., DimcicB., DimcicO.. Influence of SiC particles distribution on mechanical properties and fracture of DRA alloys [J]. Materials and Design, 2010, 31(1): 134-141

[5] SongM., HeY. H.. Effects of die-pressing pressure and extrusion on the microstructures and mechanical properties of SiC reinforced pure aluminum composites [J]. Materials and Design, 2010, 31(2): 985-989

[6] HayajnehM., HassanA. M., AlrashdanA. B.. Prediction of tribological behavior of aluminum-copper based composite using artificial neural network [J]. Journal of Alloys and Compounds, 2009, 470(1/2): 584-588

[7] MondalD. P., DasS., SureshK. S.. Compressive deformation behaviour of coarse SiC particle reinforced composite: Effect of age-hardening and SiC content [J]. Materials Science and Engineering A, 2007, 460/461: 550-560

[8] WangH., ZhangR., HuX.. Characterization of a powder metallurgy SiC/Cu-Al composite [J]. Journal of Materials Processing Technology, 2008, 197(1/2/3): 43-48

[9] AlizadehM., PaydarM. H.. Fabrication of Al/SiC_p composite strips by repeated roll-bonding (RRB) process [J]. Journal of Alloys and Compounds, 2009, 477(1/2): 811-816

[10] ShorowordiK. M., HaseebA. S. M. A., CelisJ. P.. Velocity effects on the wear, friction and tribochemistry of aluminum MMC sliding against phenolic brake pad [J]. Wear, 2004, 256(11/12): 1176-1181

[11] BindumadhavanP. N., ChiaT. K., ChandrasekaranM.. Effect of particle-porosity clusters on tribological behavior of cast aluminum alloy A356-SiC_p metal matrix composites [J]. Materials Science and Engineering A, 2001, 315(1/2): 217-226

[12] DuttaB., SamajdarI., SurappaM. K.. Particle redistribition and matrix microstructure evaluation during hot extrusion of cast SiC_p reinforced aluminium alloy matrix composites [J]. Materials Science and Technology, 1998, 14: 36-46

[13] MindivanH., KayaliE. S., CimenogluH.. Tribological behaviour of squeeze cast aluminium matrix composites [J]. Wear, 2008, 265(5/6): 645-654

[14] NaherS., BrabazonD., LooneyL.. Development and assessment of a new quick quench stir caster design for the production of metal matrix composites [J]. Journal of Materials Processing Technology, 2005, 166(3): 430-439

[15] ZhangY.-ying.Hydromechanics [M], 2000BeijingHigher Education Press50