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A kind of connection method of silicon carbide ceramic material

A technology of silicon carbide ceramics and connection methods, which is applied in the field of silicon carbide ceramic materials, can solve problems such as affecting the connection strength of components and easily forming brittle compounds, and achieve the effects of increasing interface surface energy, strengthening connections, and reducing production difficulty

Active Publication Date: 2020-06-19
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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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

Method used

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  • A kind of connection method of silicon carbide ceramic material
  • A kind of connection method of silicon carbide ceramic material
  • A kind of connection method of silicon carbide ceramic material

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Embodiment Construction

[0025] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but have no limiting effect on it.

[0026] In this embodiment, the material to be connected is silicon carbide ceramics, and the connection method is as follows:

[0027] The connecting layer material is as figure 1 and image 3 Nuts and bolts shown, connection method is electric field assisted connection.

[0028] The specific implementation steps are as follows:

[0029] (1) Roughly polish the surface of silicon carbide ceramics with a diameter of 20 mm and a height of 20 mm with a 0.1 micron diamond polishing solution to remove larger defects and impurities on the surface;

[0030] (2) Machine a concave M8 countersunk threaded hole at the position to be connected of a piece of silicon carbide ceramic; process the posit...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00
CPCC04B37/003C04B2237/086C04B2237/122C04B2237/365
Inventor 黄庆杨辉周小兵陈凡燕黄峰都时禹
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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