Junction Adhesion Strength in a Layer of Aluminum-Carbon-Fiber Composite Material

Samples of aluminum plates reinforced with a layer of carbon-fiber cloth were prepared to evaluate the junction strength in a layer of aluminum-carbon-fiber composite materials. Coatings of Cu, Ni, and Al were deposited by various methods on the cloth to improve the adhesion between the matrix and reinforcing material. The layered material was produced by compression. Liquid-phase combination of the components used casting of liquid aluminum into a form with rigidly fixed carbon fibers followed by hot plastic deformation of the resulting ingot to the dimensions of the test samples. Mechanical tensile tests found that the compressed samples were destroyed via a multifaceted mechanism with slippage between layers because of inadequate adhesion. The strength characteristics of the materials were ≤100 MPa with comparatively high plasticity. Cast samples were destroyed via a single mechanism. The strength of the adhesive junction in them was greater so that the arbitrary longitudinal deformation was ≤10%. Application of the coatings to the carbon fibers as a cloth helped to increase the adhesion between the layers. However, the methods of depositing the coatings had no significant effect on the adhesive strength of the junction. The method of combining the components had a greater effect on the nature of the destruction.