توليدشده به روش فشردن انفجاري AL/SICP مطالعه ريز ساختار و فصل مشترك در كامپوزيت هاي

The Study of Macrostructure and Interface in Aluminum/ SiCP Composites Produced by Explosive Compaction Method

Explosive compaction of powders is considered as a high energy and rapid process which involves an intense deposition of shock energy on powder particle surfaces. This process is an attractive route for the consolidation of aluminum matrix composite that offers several unique advantages over the static compaction methods in conventional powder metallurgy. The extremely short processing time (microseconds) in explosive compaction can avoid the formation of any interfacial reactions between reinforcing and matrix phase. In this investigation the density of the Al-20vol.%SiCP composite compacts has been studied with respect to the variations of explosive pad thickness as one of the important processing parameters. Microstructure and interface properties of the compacts have been studied by optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Observations indicated that distribution of SiC particles in Al matrix was different at the periphery and center of compacts. According to the experimental results obtained from SEM, TEM and X-ray diffraction, the surface of SiC particles showed no obvious reaction products such as A14C3, indicating a clean interface between SiC particles and the aluminum matrix.