Cast silicon carbide composite material and preparation method thereof

Abstract

The invention relates to the technical field of a composite material, and particularly relates to a cast silicon carbide composite material and a preparation method thereof. Aluminum oxide ceramics, high-density polyethylene and a rubber lining material cannot simultaneously meet the requirements of equipments on the abrasive resistance, the corrosion resistance and the mechanical strength at present. Import special ceramics equipment is high in price although long in service life so as to result in the problems of high operation and production costs. The cast silicon carbide composite material provided by the invention mainly contains silicon carbide, a short glass fiber, alumina powder, a carbon fiber, an adhesive component and an additive. Kinds of products with complicated shapes can be manufactured by adopting a vacuum casting production technology. The material is good in abrasive resistance, strong in chemical resistance, high in mechanical strength, and applicable to solid-liquid and solid-gas dual-phase medium conveying equipments.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a casting silicon carbide composite material and a preparation method thereof. Background technique [0002] Alumina ceramics that are often used at present have good wear resistance, corrosion resistance to weak acids, weak alkalis and salts, but due to the high brittleness and low strength of ceramic materials, it is not easy to process into equipment linings with complex shapes and high strength. High-chromium cast iron (steel) has high strength and is easy to process into complex-shaped linings, but its corrosion resistance and wear resistance are far inferior to those of ceramic materials, and their corrosion resistance and wear resistance are contradictory , the two cannot be taken into account; while the traditional high-density polyethylene and rubber lining materials have certain corrosion resistance, the disadvantage is that the erosion resistance is poor an...

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Problems solved by technology

[0002] Alumina ceramics that are often used at present have good wear resistance, corrosion resistance to weak acids, weak alkalis and salts, but due to the high brittleness and low strength of ceramic materials, it is not easy to process into equipment linings with complex shapes and high strength. High-chromium cast iron (steel) has high strength and is easy to process into complex-shaped linings, but its corrosion resistance and wear resistance are far inferior to ceramic materials, and its corrosion resistance and wear resistance are contradictory , the two cannot be taken into account; while the traditional high-density polyethylene and rubber lining materials have certain corrosion resistance, the disadvantage is that the erosion resistance is poor and easy to fall off; commonly used polyurethane materials are resistant to acid and alkali corrosion, but they are not suitable for installation. High requirements and average wear resistance, not suitable for impact wear of large particle materials

[0003] None of the above materials can meet the requirements of various types of equipment for wear resistance, corrosion resistance and mechanical strength at the same time; although the service life of imported special ceramic equipment is long, the price is high, resulting in high operating and production costs, and the cost of parts The supply and maintenance cycle is long, which cannot meet the urgent needs of the majority of users

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