| Title |
Research Paper - Composite Materials : Microstructure and Mechanical Properties of Die Cast Sic p / Al Alloy Composites |
| Authors |
이태원(Tae Won Lee); 서병권(Byoung Kwon Suh); 이두면(Doo Myun Lee); 이지환(Chi - Hwan Lee) |
| Abstract |
This study was focused to investigate the effect of die casting on the microstructure and mechanical properties of SiC_p(10 and 20vol.%)/Al alloy composites. Die casting was performed using the preheated mold at the pouring temperature of 650∼700℃ under the pressure of 916 ㎏f/㎠. The speeds of slow and high speed injection were 0.3∼0.4 and 1.4 m/s, respectively. It was found that the SiC particles were homogeneously distributed in refined Al matrix. This results from the rapid mixing of molten Al and SiC particles during injection and the improvement of segregation due to rapid solidification. Therefore, the tensile strength of SiC_p/Al alloy composites die cast at 700℃ appeared to be superior to that of the composites die cast at 650℃ with 10 and 20 volume fractions. |