تاثير افزايش آهن و درصد حجمي ذرات Sic بر ريزساختار كامپوزيتهاي زمينه فلزي A356/sic

The Effect of Fe and Volume Percent of SiC Particles on the Microstructure of A356/SiC Metal Matrix Composites

In current research shape, size and the distribution of Fe-intermetalLics in A356/SiC composites were investigated. Therefore, by remelting MMC ingots, various volume percentages of SiC (5, 10, 15 and 20 %) were applied to investigate the effect of Fe contents (0.5, 1, 1.5 and 2 %) on the microstructure of the composites. Solution and ageing heat treatment was used to all MMC specimens for better microstructural examinations by image analyzer. The preliminary results showed that iron bearing intermetallics(Pphase) forms near SiC particles as secondary phase. It was also found that the average length and the area percent of Pplates increase when, SiC increased in samples. It was observed that length of Pplate first increased then decreased when, Fe increased in samples. While the pplateʹs thickness remained constant