Ceramic silicon carbide grinding wheel containing carbon reinforced fiber

Abstract

The invention discloses a ceramic silicon carbide grinding wheel containing carbon reinforced fiber. The ceramic silicon carbide grinding wheel is prepared from following raw materials, by weight, 55 to 65 parts of silicon carbide, 30 to 35 parts of diamond abrasive, 10 to 13 parts of a short carbon fiber pre-dispersed material, 2 to 3 parts of a sintering additive, 4 to 5 parts of lanthanum hydroxide, 1 to 3 parts of potassium carbonate, 4 to 5 parts of kaolin powder, 2 to 3 parts of stearamide, 2 to 3 parts of epoxy resin, 1 to 2 parts of polyvinyl alcohol, and 80 to 90 parts of deionized water. The added short carbon fiber is capable of improving mechanical properties of silicon carbide, increasing breaking tenacity of ceramic, increasing strength and compactness of ceramic biscuit, and satisfying mechanical processing requirements; the added kaolin powder and epoxy resin are taken as binding agents, holding strength with the abrasive is increased, firm bonding is realized, hardness and grinding performance of the ceramic silicon carbide grinding wheel are improved, and service life is prolonged.

Description

technical field [0001] The invention relates to a ceramic silicon carbide grinding wheel containing carbon reinforced fibers and a preparation method thereof, belonging to the technical field of ceramic production. Background technique [0002] As we all know, pressureless sintered silicon carbide ceramics have excellent properties such as good oxidation resistance, high hardness, good thermal stability, high temperature strength, small thermal expansion coefficient, high thermal conductivity, and good thermal shock resistance and chemical corrosion resistance. It has been widely used in the fields of petroleum, chemical industry, machinery, aerospace nuclear energy and military affairs, but the pressureless sintered silicon carbide ceramics manufactured under the existing manufacturing method have disadvantages such as poor fracture toughness, small impact resistance and brittleness. subject to certain restrictions. Grinding wheels are made by mixing abrasives and binders...

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Problems solved by technology

[0002] As we all know, pressureless sintered silicon carbide ceramics have excellent properties such as good oxidation resistance, high hardness, good thermal stability, high temperature strength, small thermal expansion coefficient, high thermal conductivity, and good thermal shock resistance and chemical corrosion resistance. It has been widely used in the fields of petroleum, chemical industry, machinery, aerospace nuclear energy and military affairs, but the pressureless sintered silicon carbide ceramics manufactured under the existing manufacturing method have disadvantages such as poor fracture toughness, small impact resistance and brittleness. subject to certain restrictions