Using reaction heat of laser-induced Al-Ti-C interlayer to connect CFRTP/aluminum

摘要

The carbon fiber reinforced thermoplastics (CFRTP) was successfully joined to aluminum using a laser-induced Al-Ti-C powder interlayer. The selection principle of the composition and content of the interlayer was studied. We calculate the composition and content of the interlayer material is Al54Ti32C14. The influence of connection temperature and connection pressure on the mechanical properties of the joint is studied. The results show that the connection temperature is 1600 degrees C and the connection pressure is 30 N, the maximum shear strength of the joint can reach 5.2 MPa. This experiment uses exothermal reaction of Al-Ti-C powder by laser induces self-propagating reaction to connect aluminum and CFRTP. In the aluminum side, the metallurgical reaction between interlayer and aluminum produces Al3Ti. In the CFRTP side, under the action of pressure, using the heat generated by the self-propagating reaction to melt the CFRTP, the molten CFRTP into the micro-hole of interlayer to form mechanical interlock. At the same time, element diffusion occurs at the interface, thus forming mechanical interlocking and diffusion connections.