Ultrahigh-temperature corrosion-resistant composite material and preparation method thereof

A composite material and corrosion-resistant technology, which is applied in the field of composite materials, can solve the problems of easy oxidation and corrosion thermal conductivity, etc., and achieve the effects of enhanced oxidation resistance, low thermal conductivity, and reduced surface temperature

Active Publication Date: 2020-11-20
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an ultra-high temperature corrosion-resistant composite material and a preparation method thereof to solve the problems of easy oxidation and corrosion of composite materials such as C / C, SiC / SiC, and C / C-SiC in a high-temperature aerobic environment in the prior art. The problem of high thermal conductivity

Method used

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  • Ultrahigh-temperature corrosion-resistant composite material and preparation method thereof
  • Ultrahigh-temperature corrosion-resistant composite material and preparation method thereof
  • Ultrahigh-temperature corrosion-resistant composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] An ultra-high temperature corrosion-resistant composite material, including a C / C composite material substrate, on which an adhesive layer and a ceramic layer are deposited sequentially, the composition of the adhesive layer in Example 1 is NiCrAlY, and the ceramic layer The composition is YTaO 4 .

[0026] Rare earth tantalate (RETaO 4 ) or niobate (RENbO 4 ) preparation method, comprising the following steps:

[0027] Step 1: Put the RE 2 o 3 、 Ta 2 o 5 or Nb 2 o 5 According to the molar ratio of 1:1, it is added into a ball mill for ball milling. The rotating speed of the ball mill is 300r / min. After the ball milling, it is dried and sieved to obtain powder A.

[0028] Step 2: The powder A after drying and sieving in step 1 is prepared by high-temperature solid-state reaction method to obtain component RETaO 4 / RENbO 4 powder B, the reaction temperature is 1700° C., and the reaction time is 10 h; and the powder B is sieved with a 300-mesh sieve.

[0029] ...

Embodiment 2～17

[0035] The difference from Example 1 is that the composition or thickness of the composite material substrate and each coating layer is different, as shown in Tables 1-2 below for details.

[0036] Table 1 is the composition and thickness table of each coating of embodiment 2~9 ("--" means not containing in the table)

[0037]

[0038]

[0039] Table 2 is the composition and thickness table of each coating of embodiment 10~17 ("--" means not containing in the table)

[0040]

[0041]

Embodiment 18

[0043] The difference from Example 1 is that the composition of the ceramic layer includes YTaO 4 and SmTaO 4 , and the proportioning of the two powders is that the respective volume fractions are 50% respectively.

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Abstract

The invention relates to the technical field of composite materials, and discloses an ultrahigh-temperature corrosion-resistant composite material and a preparation method thereof. The composite material comprises a composite material base body, a bonding layer and a ceramic layer are sequentially deposited on the composite material base body, and the ceramic layer is formed by mixing one or two of rare earth tantalate (RETaO4) and rare earth niobate (RENbO4) in proportion. The prepared composite material can adapt to various severe corrosion environments, the service time of the C/C, SiC/SiC,C/C-SiC and other composite materials can be effectively prolonged, material and energy waste caused by corrosion is greatly reduced, and economic benefits are generated.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to an ultra-high temperature corrosion-resistant composite material and a preparation method thereof. Background technique [0002] Composite materials such as C / C, SiC / SiC, and C / C-SiC are characterized by low density, high specific strength, good wear resistance, excellent corrosion resistance, and excellent mechanical properties and thermophysical properties. Widely used in aerospace, automobile industry, medicine and other fields. Among them, C / C composite material is one of the very few materials that can maintain high mechanical properties above 2000 °C. It has excellent thermal expansion coefficient, thermal shock resistance, ablation resistance, and gas erosion resistance containing solid particles. Performance, especially the unique property that the strength of this material does not decrease but increases with the increase of temperature, so it is considered ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/90C04B35/495C04B35/626B24C1/10
CPCC04B41/90C04B41/52C04B35/495C04B35/626B24C1/10C04B2235/3224C04B2235/3225C04B41/51C04B41/4533C04B41/5045C04B41/4545
Inventor 冯晶杨凯龙郑奇汪俊宋鹏种晓宇葛振华李振军王峰
Owner KUNMING UNIV OF SCI & TECH
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