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Impregnation slurry and preparation method thereof

A technology of slurry and wet ball milling, which is applied in the field of preparation of ceramic matrix composite materials to achieve the effect of improving ablation resistance, efficiency and oxidation resistance

Pending Publication Date: 2022-03-04
成都成维精密机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most studies are on the modification of fibers, interface phases, and surface coatings. There are few reports on the modification of the matrix. At present, there is still a lack of means to successfully introduce anti-ablation components into fiber-reinforced ceramic matrix composites.

Method used

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  • Impregnation slurry and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0028] A preparation method for dipping slurry, comprising the following steps:

[0029] ① The ceramic powder Si 3 N 4 , SiC, ZrB 2 , ZrC, H f C.H f B 2 , BN and B 4 One or more components in C are slowly poured into the alumina ball milling jar in sequence, distilled water is added, and zirconium balls are put in as the ball milling medium, wherein, raw materials (ceramic powder containing anti-ablation components), grinding balls, The water mass ratio is 2~4:5~9:2~4; place the ball mill jar in a planetary ball mill, grind at a speed of 400~600r / min for 4~8h, screen out the ball milling medium, put it in a drying oven at 100 Dry the mixed powder at ~120°C for 4-8 hours; collect the dried mixed powder in an agate mortar and grind for 1-2 hours, and then pass through a 100-mesh sieve to obtain a uniformly mixed ceramic powder;

[0030] ② After the ceramic precursor is pulverized, it is slowly dissolved into one or more organic solvents such as xylene, cyclohexane, diviny...

Embodiment 1

[0034] ① ZrB 2 The ceramic powder is slowly poured into an alumina ball mill jar, distilled water is added, and zirconium balls are put in as a ball mill medium, wherein the raw material (ZrB 2 Ceramic powder), grinding balls, and water mass ratio of 3:8:2; put the ball mill jar in a planetary ball mill, grind at a speed of 600r / min for 6h, sieve out the ball milling medium, and put it in a drying oven to dry at 110°C Mix the powder uniformly for 8 hours; collect the dry mixed powder in an agate mortar and grind for 1 hour, and then pass through a 100-mesh sieve to obtain ZrB 2 Ultrafine ceramic powder;

[0035] ② After the polycarbosilane is pulverized, it is slowly dissolved in xylene, the dissolution temperature is 40°C, and the heating method is a water bath to form a ceramic precursor solution (viscosity is 120mPa·s);

[0036] ③The ceramic precursor solution in step ②, the ZrB in step ① 2 The ultra-fine ceramic powders are successively loaded into the alumina ball mill...

Embodiment 2

[0039]① Slowly pour the ZrC ceramic powder into an alumina ball mill jar, add distilled water, and put in zirconium balls as the ball milling medium, wherein the mass ratio of raw material (ZrC ceramic powder), grinding balls, and water is 3:8:2; Put the ball mill jar in a planetary ball mill, grind at a speed of 600r / min for 6h, sieve out the ball milling medium, put it in a drying oven and dry the mixed powder at 110°C for 8h; collect the dried mixed powder in an agate mortar Grind for 1 hour, then pass through a 100-mesh sieve to obtain ZrC ultrafine ceramic powder;

[0040] ② After the polycarbosilane is pulverized, it is slowly dissolved in xylene, the dissolution temperature is 40°C, and the heating method is a water bath to form a ceramic precursor solution (viscosity is 120mPa·s);

[0041] ③Put the ceramic precursor solution in step ② and the ZrC ultrafine ceramic powder in step ① into an alumina ball milling tank in turn, wherein the ceramic precursor solution is 95wt...

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Abstract

The invention discloses dipping slurry and a preparation method thereof. The dipping slurry contains 5-20wt% of ceramic powder, 5-20wt% of a curing agent, and the balance of water. 80 to 95 wt% of a ceramic precursor solution; wherein the ceramic powder is ceramic powder containing anti-ablation components. The impregnation slurry is prepared by introducing ceramic powder containing anti-ablation components into a ceramic precursor solution, so that the anti-ablation capability of the composite material is fundamentally improved, and the oxidation resistance and the scouring resistance of the ceramic-based composite material are improved.

Description

technical field [0001] The invention relates to the field of preparation of ceramic matrix composite materials, in particular to an impregnation slurry and a preparation method thereof. Background technique [0002] Ceramic matrix composites have wide application potential in the fields of aerospace, nuclear fission, and nuclear fusion. Continuous fiber toughened ceramic matrix composites are currently a research hotspot. The main preparation methods include: Polymer Infiltration and Cracking Process (Polymer Infiltration and Pyrolysis, PIP), chemical vapor infiltration process (Chemical VaporInfiltration, CVI), nano impregnation and transient eutectic phase process (Nano-Infiltrated and TransientEutectoid, NITE) and reaction infiltration process (Reaction Infiltration, RI), etc. [0003] The PIP process is to impregnate the fiber preform with a liquid ceramic precursor (impregnation), the liquid ceramic precursor is cross-linked and solidified (cured), and then subjected to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/583C04B35/584C04B35/565C04B35/563C04B35/56C04B35/622C04B35/626C04B35/80
CPCC04B35/58078C04B35/5622C04B35/80C04B35/622C04B35/565C04B35/584C04B35/583C04B35/563C04B35/6261C04B2235/9669C04B2235/9684
Inventor 李涛尧巍华
Owner 成都成维精密机械制造有限公司
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