Silicon-based ceramic core slurry and application thereof

A ceramic core and silicon-based technology is applied in the field of ceramic additive manufacturing to achieve the effects of improving forming accuracy, realizing forming, and weakening the step effect

Active Publication Date: 2021-03-16
西安国宏天易智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of silicon-based ceramic core slurry and its application, to overcome the deficiencies in the prior art

Method used

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  • Silicon-based ceramic core slurry and application thereof
  • Silicon-based ceramic core slurry and application thereof
  • Silicon-based ceramic core slurry and application thereof

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preparation example Construction

[0033] A method for preparing a silicon-based ceramic core, characterized in that it comprises the following steps:

[0034] Step 1), take 30-65 parts by weight of fused silica powder, 1-15 parts of cristobalite powder, 0.1-3 parts of light absorbing agent, 1-16 parts of mica powder, 1-13 parts of zircon powder, quartz 0.1-1.9 parts of fiber, 0.2-10 parts of powder surface modifier, 15-55 parts of photosensitive resin, 0.2-3.5 parts of photoinitiator, 0.5-3.5 parts of dispersant, 2-5 parts of viscosity modifier, 0.2 parts of emulsifier ~4 copies;

[0035] Step 2), mix the above-mentioned mica powder, zircon powder, quartz fiber, powder surface modifier, dispersant, viscosity regulator and emulsifier in absolute ethanol to obtain a mixed solution A; mix the above-mentioned light absorbing agent, The photosensitive resin and the photoinitiator are evenly mixed to obtain a resin mixture;

[0036] Step 3), above-mentioned fused silica powder and cristobalite powder are added in ...

Embodiment 1

[0046] Step 1: Take 2 parts of mica powder, 3 parts of zircon powder, 0.7 part of quartz fiber, 0.9 part of powder surface modifier, 1.5 parts of dispersant, 3 parts of viscosity modifier and 1.1 part of emulsifier in parts by weight, Mix in absolute ethanol and mix uniformly to obtain mixed solution A; take light absorber 0.2, photosensitive resin 15 and photoinitiator 1 and mix uniformly to obtain a resin mixture;

[0047] Step 2: 50 parts of fused silica powder and 6 parts of cristobalite powder are added in mixed solution A to obtain mixed powder solution;

[0048] Step 3: Put the mixed powder solution into a vacuum defoamer and mix for 7 hours, then place it in a vacuum drying oven, and vacuum process it at room temperature for 4 hours to obtain a uniformly mixed inorganic powder;

[0049] Step 4: Add the uniformly mixed inorganic powder into the resin mixture and mix evenly, then put it in a vacuum defoaming machine, defoam for 2 hours, remove the air bubbles in the slur...

Embodiment 2

[0054] Step 1: Take 3 parts of mica powder, 4 parts of zircon powder, 1.3 parts of quartz fiber, 1.2 parts of powder surface modifier, 1.5 parts of dispersant, 3 parts of viscosity regulator and 1.5 parts of emulsifier by weight parts, Mix in absolute ethanol and mix uniformly to obtain mixed solution A; take light absorber 1, photosensitive resin 35 and photoinitiator 2 and mix uniformly to obtain resin mixture;

[0055] Step 2: 43 parts of fused silica powder and 5 parts of cristobalite powder are added in mixed solution A to obtain mixed powder solution;

[0056] Step 3: Put the mixed powder solution into a vacuum defoamer and mix for 7.5 hours, then place it in a vacuum drying oven, and vacuum process it at room temperature for 5 hours to obtain a uniformly mixed inorganic powder;

[0057] Step 4: Add the uniformly mixed inorganic powder into the resin mixture and mix evenly, then put it in a vacuum defoaming machine, defoam for 3 hours, remove the air bubbles in the slurr...

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Abstract

The invention discloses a preparation method and application of a silicon-based ceramic core. Mixed slurry obtained according to the mixing ratio is formed by using a photocuring method to obtain a mold core biscuit, the mold core biscuit is degreased and then impregnated with a ceramic slurry, the impregnated mold core biscuit is dried, and the dried mold core biscuit is sintered in an air atmosphere by using a buried powder sintering method to obtain the silicon-based ceramic core. By means of the method, forming of a high-surface-precision silicon-based ceramic core blank can be achieved, the forming precision of the silicon-based ceramic core is improved, the production process of the ceramic core is accelerated, and the forming difficulty of the silicon-based ceramic core of a complexstructure is lowered. Degreasing and sintering treatment are carried out on the mold core biscuit obtained through the photocuring method, dipping lifting treatment is carried out on the mold core biscuit through the silicon oxide inorganic slurry, and the surface precision of the silicon-based ceramic mold core blank can be effectively improved. The method is simple, and the forming difficulty of the silicon-based ceramic mold core with a complex structure is reduced.

Description

technical field [0001] The invention belongs to the technical field of ceramic additive manufacturing, and relates to a silicon-based ceramic core slurry and its application. Background technique [0002] Silicon-based ceramic cores have become hollow turbine blades for new engines due to their excellent high temperature resistance, low thermal expansion rate, no crystal transformation, good metallurgical chemical stability, excellent creep resistance, stable structure, and good high temperature resistance. An important structural component for cavity molding. [0003] The traditional preparation of silicon-based ceramic cores uses investment casting technology, which has problems such as cumbersome process flow, low molding accuracy, long production cycle, and high production cost. At present, ceramic cores are prepared by selective laser sintering ceramic additive manufacturing technology, which shortens the production cycle of ceramic cores and reduces costs, but this me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/82B22C1/00B22C9/10B28B1/00B28B11/04B33Y10/00B33Y40/20B33Y70/10B33Y80/00
CPCC04B35/14C04B35/622C04B35/82B22C1/00B22C9/10B28B1/001B28B11/045B33Y10/00B33Y40/20B33Y70/10B33Y80/00C04B2235/3463C04B2235/3427C04B2235/424C04B2235/6562C04B2235/6567C04B2235/96
Inventor 魏挺史见罗铭宇陈双杨宇
Owner 西安国宏天易智能科技有限公司
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