Complex-phase reaction sintering silicon carbide ceramic pump and manufacturing method thereof

Abstract

The invention relates to the technical field of silicon carbide ceramic pumps, and discloses a complex-phase reaction sintering silicon carbide ceramic pump and a manufacturing method thereof. The complex-phase reaction sintering silicon carbide ceramic pump comprises a pump shell, a front protection plate, an impeller and a rear protection plate which are each of a multi-layer structure. A ceramic structural part, a resin-silicon carbide combined bonding layer and a metal framework part are sequentially included from outside to inside, pores of the ceramic structural part are filled with reaction sintering silicon carbide layers, a reaction sintering silicon carbide ceramic layer is arranged on the inner wall of the ceramic structural part, and the reaction sintering silicon carbide layers and the reaction sintering silicon carbide ceramic layer are integrally formed. The complex-phase reaction sintering silicon carbide ceramic pump and the manufacturing method thereof have the following advantages and effects that reaction sintering silicon carbide ceramic parts at different parts of the ceramic structural part can be prepared at the same time, and in the secondary sintering process, the reaction sintering silicon carbide ceramic parts and the ceramic structural part are tightly combined, so that the integrity of the reaction sintering silicon carbide ceramic parts and a pump body is good, and the wear resistance of the pump body is improved.

Description

technical field [0001] The invention relates to the technical field of silicon carbide ceramic pumps, in particular to a complex-phase reaction sintered silicon carbide ceramic pump and a manufacturing method thereof. Background technique [0002] Silicon carbide-based ceramic materials are a series of ceramic materials developed on the basis of silicon carbide ceramics, including a series of high-tech ceramic materials such as oxide-bonded silicon carbide, silicon nitride-bonded silicon carbide, and Sialon-bonded silicon carbide. This series of ceramic materials has a series of excellent properties such as high temperature resistance, high strength, corrosion resistance, thermal shock resistance, oxidation resistance, and wear resistance. Has a wide range of applications. Among them, the silicon nitride combined with silicon carbide ceramic material uses metal silicon powder to undergo nitriding reaction in nitrogen to form silicon nitride, and combines silicon carbide par...

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Problems solved by technology

[0003] At present, large-scale and complex-structured products generally adopt the grouting molding method, and the product has a high opening porosity and a low volume density (usually the opening porosity is as high as 18%, and the volume density is 2.50g / cm 3 Below), the performance of the product is seriously affected and the scope of application is limited

The slurry pump can be made of silicon nitride combined with silicon carbide ceramics, which has good corrosion resistance and high strength performance, but there are large particles with a size of 4-15mm in the slurry being transported, the slurry flow rate is large, and the slurry has strong abrasion and strong impact, or in the environment of transporting strong alkali corrosion slurry and high hardness (Mohs hardness level 7) strong abrasive slurry in the alumina beneficiation industry, ceramic pumps are required to have good resistance to strong abrasion, alkali corrosion and Shock resistance, the current ceramic pumps at home and abroad still cannot meet the performance requirements of the working conditions for materials

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