Boride modified glass ceramic based composite high-temperature oxidation resisting coating and preparation method thereof

A high-temperature oxidation-resistant, glass-ceramic technology, which is applied in the field of high-temperature refractory metal protection, can solve the problems of high preparation temperature and insufficient thermal erosion resistance of silicate glass-ceramic coatings, and achieves simple preparation process and improved thermal shock resistance. performance, the effect of good thermal washout performance
CN106587629AActive Publication Date: 2017-04-26NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
Publication Date
2017-04-26

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Abstract

The invention discloses a boride modified glass ceramic based composite high-temperature oxidation resisting coating. The composite high-temperature oxidation resisting coating fired on the surface of a refractory metal matrix is prepared from boride and silicate glass, wherein the boride is at least one or two of HfB2, ZrB2 and TiB2; besides, the invention further discloses a preparation method of the coating. The method comprises steps as follows: 1, the surface of the refractory metal matrix is treated; 2, boride particle modified glass ceramic composite slurry is prepared; 3, a preset layer is obtained by presetting the slurry on the surface of the refractory metal matrix, and the boride modified glass ceramic based composite high-temperature oxidation resisting coating is obtained vacuum high-temperature firing. The composite high-temperature oxidation resisting coating is used for high-temperature protection of the refractory metal matrix and can continuously protect the refractory metal matrix at the protection temperature of 400-1,600 DEG C for 5 h or longer.
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Description

technical field

[0001] The invention belongs to the technical field of high-temperature refractory metal protection, and in particular relates to a boride-modified glass ceramic matrix composite high-temperature anti-oxidation coating for protection of refractory metals and a preparation method thereof. Background technique

[0002] Refractory metals have excellent high-temperature strength and toughness and good processing properties, and have been widely used in the aerospace industry, aviation industry and atomic energy industry. However, the application of refractory metals in high-temperature oxidizing environments has oxidation resistance problems, and its high-temperature oxidation resistance ability is difficult to improve through alloying. Therefore, the development of high-performance high-temperature oxidation-resistant coatings has become the key to the high-temperature application of refractory metal substrates and their alloys.

[0003] At present, for refract...

Claims

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