▎ 摘　　要

NOVELTY - A wear-resistant and noise-reducing bionic double-layer wear-resistant ceramic brake pad comprises a base layer (1) and a contact layer (2) located above the base layer. The contact layer is provided with an indirectly arranged triangular groove (3). The triangular groove is filled with wear-resistant adjusting material. The wear-resistant adjusting material comprises 8-15 %mass zircon powder, 2-3 %mass graphene oxide, 0.5-5 %mass aluminum powder, 12-20 %mass tin powder, 2-9 %mass silver powder, 5-8 %mass molybdenum disulfide, 8-13 %mass antimony sulfide, 10-19 %mass linseed oil modified phenolic resin, and 25-39 %mass calcium carbonate. USE - Wear-resistant and noise-reducing bionic double-layer wear-resistant ceramic brake pad for use as key component of brake system of vehicle. ADVANTAGE - The bionic double-layer composite structure ceramic brake pad has small fluctuation range of friction coefficient at high temperature, stable friction performance, stable braking, high comfort, low material wear rate, and excellent lubricating performance, wear resistance and noise-reducing performance. The service life of the brake pad is greatly improved. The friction interface layer of the bionic double-layer composite structure is prepared in a controllable manner. The preparation process is simple, easy to operate and environmentally-friendly, and satisfies the energy-saving and emission-reduction effects. The base layer component stably ensures the strong toughness of the base layer. The bionic triangular groove is filled with wear-resistant adjusting material, so that the formation of the friction layer is ensured, and the time-varying contact characteristics of the friction pair and the formation of the friction layer suppress the generation of friction noise. The bionic double-layer ceramic brake pad has high utilization rate and stability of braking performance in the effective life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation method of wear-resistant and noise-reducing bionic double-layer wear-resistant ceramic brake pad, which involves (S1) uniformly mixing the raw materials of the base layer and contact layer and the raw materials of the wear-resistant adjusting materials respectively to obtain raw material mixture of the base layer, raw material mixture of the contact layer and the raw material mixture of the wear-resistant adjusting material, (S2) orderly filling the raw material mixture of the base layer and the raw material mixture of the contact layer in a mold, perform premolding at 5-10 MPa respectively, putting the obtained preform in a heat treatment furnace, raising to 550-650degreesC at 10-15degreesC/minute under the protection of nitrogen environment, setting the hot pressing pressure to be 120-180 MPa, cooling to room temperature, and demolding to obtain a bionic double-layer ceramic brake pad blank, (S3) cutting the ceramic brake pad blank by a precise cutter, forming the triangular groove in the contact layer, filling the wear-resistant adjusting material in the triangular groove, placing in a hot-pressing mold at pressure of 8-12 MPa, melting in a high temperature vacuum furnace at 250-300degrees Celsius and vacuum degree of 0.8-1.2 x 10-3 Pa for 15-20 minutes, and cooling with the furnace to obtain bionic double-layer ceramic brake pad blank filled with wear-resistant adjusting material, and (S4) heat-treating the bionic double-layer ceramic brake pad blank obtained in (S3) by raising the temperature to 137-150degreesC for 2.5-4 hours, raising the temperature to 165-180degreesC for 6-7.5 hours, heating to 195-205degreesC for 1.5-1.8 hours, cooling to room temperature, and post-processing to obtain a final product. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the bionic double-layer wear-resistant ceramic brake pad. Base layer (1) Contact layer (2) Triangular groove (3)