Process for preparing multilayer ZrB2-SiC complex phase ultrahigh temperature ceramic wafer material by tape casting

An ultra-high temperature ceramic, zrb2-sic technology, applied in ceramic layered products, layered products, chemical instruments and methods, etc., can solve the problems of insufficient material toughness, and the anti-oxidation performance needs to be further improved, so as to improve the fracture toughness. Effect

Inactive Publication Date: 2010-09-29
南通市通州区益君劳务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its current performance cannot meet the needs of practical applications, mainly reflected in the need to improve the molding process, insufficient material toughness, and further improvement in oxidation resistance.

Method used

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  • Process for preparing multilayer ZrB2-SiC complex phase ultrahigh temperature ceramic wafer material by tape casting
  • Process for preparing multilayer ZrB2-SiC complex phase ultrahigh temperature ceramic wafer material by tape casting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of multilayer ZrB by a casting method 2 -The process of SiC composite ultra-high temperature ceramic material is realized by the following steps:

[0027] 1. Preparation of SiC ceramic green film

[0028] After mixing 50kg of SiC powder with a particle size of 1-10μm, 40kg of xylene and alcohol mixed liquid with a volume ratio of 1:1, and 0.5kg of dispersant, stir and ball mill for about 24 hours, and then add 1.5kg of plasticizer and 4kg of The binder continues to be mixed by ball milling for about 24 hours; the resulting slurry is filtered and then vacuum degassed using an air pump to obtain a slurry with a viscosity of 50-200cps, and finally cast the slurry on a commercial casting machine to obtain a 2μm thick SiC ceramic raw film;

[0029] 2. Preparation of ZrB 2 -SiC composite ceramic green film

[0030] 60kg of ZrB with a particle size of 1-10μm 2 Mix with SiC powder with a particle size of 1-10μm, 40kg of xylene and alcohol mixed liquid with a vo...

Embodiment 2

[0042]Preparation of multilayer ZrB by a casting method 2 -The process of SiC composite ultra-high temperature ceramic material is realized by the following steps:

[0043] 1. Preparation of SiC ceramic green film

[0044] After mixing 50kg of SiC powder with a particle size of 1-10μm, 80kg of xylene and alcohol mixed liquid with a volume ratio of 1:1, and 1kg of dispersant, stir and ball mill for about 24 hours, and then add 2.5kg of plasticizer and 4- 6kg of binder continued to be mixed by ball milling for about 24 hours; the resulting slurry was filtered and then vacuum degassed with an air pump to obtain a slurry with a viscosity of 50-200cps, and finally cast the slurry on a commercial casting machine to obtain 20-200 cps 500μm thick SiC ceramic raw film;

[0045] 2. Preparation of ZrB 2 -SiC composite ceramic green film

[0046] 60kg of ZrB with a particle size of 1-10μm 2 Mix with SiC powder with a particle size of 1-10μm, 80kg of xylene and alcohol mixed liquid wi...

Embodiment 3

[0058] A kind of multi-layer ZrB prepared by casting method 2 -The process of SiC composite ultra-high temperature ceramic material is realized by the following steps:

[0059] 1. Preparation of SiC ceramic green film

[0060] After mixing 50kg of SiC powder with a particle size of 1-10μm, 60kg of xylene and alcohol mixed liquid with a volume ratio of 1:1, and 0.8kg of dispersant, stir and ball mill for about 24 hours, and then add 2kg of plasticizer and 5kg of viscose respectively. The binder continues to be mixed by ball milling for about 24 hours; the resulting slurry is filtered and then vacuum degassed with an air pump to obtain a slurry with a viscosity of 50-200cps, and finally cast the slurry on a commercial casting machine to obtain a thickness of 20-500μm SiC ceramic raw film;

[0061] 2. Preparation of ZrB 2 -SiC composite ceramic green film

[0062] 60kg of ZrB with a particle size of 1-10μm 2 Mix with SiC powder with a particle size of 1-10μm, 60kg of xylene ...

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Abstract

The invention relates to ZrB2-SiC complex phase ultrahigh temperature ceramic, in particular to a process for preparing multilayer ZrB2-SiC complex phase ultrahigh temperature ceramic material by tape casting. The process for preparing multilayer ZrB2-SiC complex phase ultrahigh temperature ceramic material by tape casting is realized by the following steps: preparation of SiC ceramic biological membrane, preparation of ZrB2-SiC complex phase ceramic biological membrane, multilayer membrane stacking and laminating, binder removing and sintering; fracture toughness of the acquired multilayer ZrB2-SiC complex phase ultrahigh temperature ceramic material reaches 7-12Mpa.m1/2, flexural strength is 600-800MPa. The two indexes are obviously higher than those of ZrB2-SiC complex phase ceramic prepared by conventional method.

Description

technical field [0001] The present invention relates to ZrB 2 -SiC composite phase ultra-high temperature ceramics, in particular to a process for preparing multi-layer ZrB2-SiC complex phase ultra-high temperature ceramic materials by casting method. Background technique [0002] In the field of aerospace and weaponry, ZrB 2 -SiC ultra-high temperature ceramic composites have a series of excellent properties such as high melting point, high thermal conductivity, strong mechanical properties, and better oxidation resistance than C / C composites, and are expected to be widely used. However, its current performance cannot meet the needs of practical applications, mainly because the molding process needs to be improved, the material toughness is insufficient, and the oxidation resistance performance needs to be further improved. Texturing is an important way to optimize the properties of ceramic materials. This patent prepares multi-layer ZrB by casting method 2 -SiC ultra-h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/622B32B18/00
Inventor 李艳周晓军
Owner 南通市通州区益君劳务有限公司
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