C/C composite material with high-temperature ceramic coating layer MTaO4 and preparation method thereof

A technology of high-temperature ceramics and composite materials, which is applied in the field of composite materials to achieve the effect of prolonging the service life

Pending Publication Date: 2021-01-29
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From a domestic point of view, after years of hard work, the problem of long-term static anti-oxidation protection of C / C composite materials in the medium and low temperature range below 1600 ° C has been relatively mature, and there are also certain results at 1600 ~ 1800 ° C, but for higher temperatures, Especially the ultra-high temperature oxidation resistance and ablation resistance above 2000°C are in urgent need of more research

Method used

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  • C/C composite material with high-temperature ceramic coating layer MTaO4 and preparation method thereof
  • C/C composite material with high-temperature ceramic coating layer MTaO4 and preparation method thereof
  • C/C composite material with high-temperature ceramic coating layer MTaO4 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] C / C composite with high-temperature ceramic coating MTaO4, including a C / C composite matrix, outside which a transition layer and AlTaO are sequentially deposited 4 Ceramic coatings where the composition of the transition layer includes silicon, silicon carbide and aluminosilicates.

[0034] The preparation method of above-mentioned composite material, comprises the following steps:

[0035] Step 1: Weigh 121.4g of monocrystalline silicon, 25.4g of alumina powder and 11g of calcium oxide, place them together with absolute ethanol in a ball mill jar for mixing, seal and place on a planetary ball mill for ball milling, wherein the speed of the ball mill The ball milling time is 500r / min, and the ball milling time is 300min, so that the two powders are mixed evenly, and the mixed powder after ball milling is dried at 80°C for 24h, and passed through a 400-mesh sieve.

[0036]Step 2: Embed the C / C composite matrix in an alumina porcelain boat with the powder sieved in step...

Embodiment 2～9、 comparative example 1～4

[0042] The difference from Example 1 is that the process parameters in the preparation process are different, as shown in Table 1 for details.

[0043] Table 1 is the preparation process parameter table of embodiment 2~9 and comparative example 1~4

[0044] Monocrystalline silicon Aluminum oxide Calcium Oxide Calcination temperature (℃) Calcination time (h) Ceramic coating (μm) Example 2 121.4g 41g 11g 1300 10 200 Example 3 121.4g 21g 11g 1300 10 200 Example 4 121.4g 25.4g 24g 1300 10 200 Example 5 121.4g 25.4g 15g 1300 10 400 Example 6 121.4g 25.4g 11g 1100 15 300 Example 7 121.4g 25.4g 11g 1800 10 300 Example 8 121.4g 25.4g 11g 1300 10 200 Example 9 121.4g 25.4g 11g 1300 10 100 Comparative example 1 121.4g 25.4g 0 1300 10 400 Comparative example 2 121.4g 10g 5g 1300 10 300 Comparative example 3 121.4g 25.4g 11g 500 10 300 Comparati...

Embodiment 10

[0046] The difference from Example 1 is that the ceramic coating in this example is FeTaO 4 , where FeTaO 4 The preparation method of the powder is the same as in Example 1.

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Abstract

The invention relates to the technical field of composite materials, and particularly discloses a C / C composite material with a high-temperature ceramic coating layer MTaO4 and a preparation method thereof. The method comprises steps: weighing monocrystalline silicon, aluminum oxide and calcium oxide, carrying out ball milling together with absolute ethyl alcohol, uniformly mixing, drying, and screening; embedding a C / C composite matrix in an alumina porcelain boat by using screened powder, and carrying out high-temperature calcination to form a transition layer containing silicon carbide andaluminosilicate on the surface of the C / C composite matrix; and spraying MTaO4 powder to the surface of the transition layer by adopting an atmospheric plasma spraying method to form the C / C compositematerial of which the surface is sprayed with the MTaO4 ceramic coating layer. The C / C composite material obtained by adopting the method disclosed by the invention can resist the ultrahigh temperature of 2000 DEG C or above for 10-120 minutes, and keeps good oxidation resistance and ablation resistance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a C / C composite material with a high-temperature ceramic coating MTaO4 and a preparation method thereof. Background technique [0002] C / C composite material is a carbon matrix composite material with carbon fiber as a reinforcing phase. Because of its low density (theoretical density is 2.2g / cm 3 ), friction resistance, ablation resistance and a series of advantages, it is an ideal friction-resistant material, which has been widely used in aerospace. At present, C / C composite materials are most widely used in aircraft brake pads. In addition, some key parts of the missile, such as the nose cone, nozzle, and throat lining material of the solid rocket engine, and the application environment of C / C composite materials in aerospace are very harsh, and they usually have to withstand high temperature, high pressure and high speed, including Oxidation and erosion by oxygen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/89
CPCC04B41/009C04B41/52C04B41/89C04B41/5059C04B41/5031C04B41/5022C04B41/4556C04B41/4552C04B41/5027C04B41/4527C04B35/83
Inventor 冯晶汪俊荣菊郑奇陈琳李振军王峰
Owner KUNMING UNIV OF SCI & TECH
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