Preparation method of W2C-based W2C / WC dual-phase porous ceramic

CN119306509APending Publication Date: 2025-01-14ANHUI UNIVERSITY OF ARCHITECTURE
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Patent Information

Application Number
CN202411439173.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-15
Publication Date
2025-01-14

AI Technical Summary

Technical Problem

In the prior art, there are fewer preparation methods for pure phase W2C or W2C-based ceramics, mainly because it is difficult to obtain large batches of pure phase W2C powders, and W2C ceramics are prone to phase change during firing, resulting in limited preparation methods.

Method used

WC powder is used as the starting material, and a small amount of ZrO2 and W powder is mixed, and the compound material is prepared by ball milling. After granulation is made with paraffin, it is sintered under negative pressure or reducing atmosphere, and the temperature and time are controlled to generate W2C-based W2C. /WC biphasic porous ceramics.

Benefits of technology

By generating W2C in situ, high-strength and high-hard W2C/WC biphasic porous ceramics are obtained, which expands its application potential in the fields of grinding tools, porous molds, electrocatalytic hydrogen evolution or electron emission materials.

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Abstract

The invention discloses a preparation method of W2C-based W2C / WC dual-phase porous ceramic, WC powder is used as an initial raw material, a small amount of ZrO2 and W powder are doped, ball milling and mixing are carried out to prepare a batch, after granulation and molding are carried out with paraffin, sintering is carried out in a negative pressure inert atmosphere or a reducing atmosphere, and the W2C-based high-strength and high-hardness W2C / WC dual-phase porous ceramic can be obtained. According to the invention, a small amount of ZrO2 and metal W powder are added into a WC-based phase, reaction is carried out under the action of negative pressure and high temperature, W2C is generated in situ, and the high-strength and high-hardness W2C / WC dual-phase porous ceramic with W2C as a main phase is obtained. According to the invention, W2C-based W2C / WC composite ceramics with different porosities are obtained mainly by controlling the contents of ZrO2 and the granulating agent paraffin, so that the application of W2C ceramic matrix materials in the fields of grinding tools, porous molds, electro-catalytic hydrogen evolution or electron emission materials and the like becomes possible.
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Citation Information

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