Preparation, Microstructure and Compressive Properties of Silicone GEL/SiC Composites for Elastic Abrasive

An elastic abrasive tool based on micropore silica gel was designed and reinforced with silicon carbide (SiC) particle. The abrasive internal structure presents porous chain network structure, and the enhanced particles uniformly distributed in the matrix. The compression performance of modified composites is nonlinear increasing. The experimental results show that the accumulating energy of the self microporous structure is easy to overcome the internal friction in a certain deformation quantity of the materials. When the deformation quantity is large enough, the microporous structure and the chain segment structure of the matrix silica gel affect weakened, so that the properties of the composite decreased. And there is a synergistic relationship between the particles size and the matrix silica gel. That is, when the particle size is near the silicon chain length, the effect of particle enhancement is obvious. When the particle size is small, the effect of particles was reduced because the particles are inlaid between the slots in the silicon chain. On the other hand, when the particle size is larger, the particles are not work in the composites