Method for connecting silicon carbide ceramic materials

Abstract

The present invention provides a method for connecting silicon carbide ceramic materials. The method comprises: processing a concave threaded hole at the to-be-connected position of one silicon carbide ceramic material; and processing the to-be-connected position of the other silicon carbide ceramic material into a projecting bolt shape with threads, and depositing a middle connection layer on the threaded surface, wherein the deposited threads and the threaded hole form threaded combination, the middle connection layer is a laminated structure and comprises at least two titanium layers, and a carbon layer is arranged between the adjacent titanium layers. According to the present invention, the silicon carbide ceramic materials to be connected are integrally connected through the mechanical matching between the threaded holes and the bolt; and the connection interface produces the chemical diffusion effect through the external heat source heating so as to further enhance the connection of the silicon carbide ceramic materials to be connected.

Description

technical field [0001] The invention belongs to the technical field of silicon carbide ceramic materials, and in particular relates to a connection method of silicon carbide ceramic materials. Background technique [0002] Silicon carbide ceramics (SiC) and its composites have been considered as promising high-temperature structural materials due to their good high-temperature oxidation resistance, wear resistance, and excellent mechanical properties. However, the high brittleness and low ductility of silicon carbide ceramics and their composite materials make it difficult to make complex parts, and they are often connected with other parts to form a composite structure to meet the use requirements. Therefore, it is of great significance to strengthen the research on the connection of silicon carbide ceramics and its composite materials to expand its engineering applications. [0003] The joining methods of silicon carbide ceramics and their composite materials include mech...

AI Technical Summary

Problems solved by technology

Diffusion connection is to use the principle of solid-state diffusion to achieve the combination of materials to be connected by heating and pressure. Usually, it is necessary to introduce some filler metal as the intermediate connection material, so when selecting the intermediate connection material, special consideration should be given to the thermal expansion of the intermediate connection material and the base material. coefficient matching problem; and this connection method usually needs to be carried out under high temperature and high pressure, so brittle compounds are easily formed at the joint; in addition, factors such as joint structure, distribution and intermediate connection layer thickness will affect the connection strength of components

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