Abstract
Metal and plastic parts can be jointed strongly by chemical surface modification of the metal which creates a large number of nano-sized pores on its surface. Strong adhesion between the surface-modified aluminum (Al) alloy part and polyphenylene sulfide (PPS) were obtained easily by insert injection molding. The interface between the Al and the PPS formed by this method was investigated by energy-filtering transmission electron microscopy (EFTEM). High-resolution analysis by elemental mapping and electron energy loss spectroscopy (EELS) was enabled by optimization of the analytical technique for metal/plastic interfaces. Thin cross sections of the Al/PPS interfaces were prepared by ultramicrotomy and by focused ion beam (FIB) fabrication. The ultramicrotomy gave thin and uniformed section swith the thickness of about 70 nm. It has been revealed that PPS is penetrated into the nano-sized pores on the Alsurface, which clarifies the origin of the highbond strength.
