INFLUENCE OF THE RANGE OF PARTICLE SIZES OF THE FILLER ON THE ADHESION STRENGTH AND RESIDUAL STRESSES IN EPOXY COMPOSITES

摘要

We study the influence of the contents and physical nature of coarse-grained (60-65 μm) and fine grained (3-10 μm) particles on the adhesion strength and residual stresses in epoxy composites for func tionally gradient coatings. The temperature-and-time conditions of cross-linking of the epoxy matrix are optimized. The maximum adhesion strength (49.2-50.0 MPa) is attained as a result of the addition of copper-oxide filler (60-65 μm) to the epoxy oligomer in the following amounts: q - 60-80 m.p. per100 m.p. of the epoxy matrix. The residual stresses vary from 4.5 to 4.8 MPa.