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Silica-based ceramic mold core and preparation method thereof

A ceramic core and silicon-based technology, which is applied in the field of silicon-based ceramic cores and their preparation, can solve the problems of large deflection at high temperature and insufficient high-temperature strength of silicon-based ceramic cores.

Active Publication Date: 2017-05-31
成都航大新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of insufficient high-temperature strength and large high-temperature deflection of the current silicon-based ceramic core; the present invention provides a silicon-based ceramic core with high high-temperature strength, low high-temperature deformation, and low sintering shrinkage and a preparation method

Method used

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  • Silica-based ceramic mold core and preparation method thereof
  • Silica-based ceramic mold core and preparation method thereof
  • Silica-based ceramic mold core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The formula of the core powder is shown in Table 1, which includes: mineralizer, quartz glass powder, surfactant, plasticizer, and additives.

[0029] Zirconium silicate is a mineralizer, wherein, zirconium silicate is calcined zirconium silicate of 325 mesh; dry powder is composed of quartz glass powder and mineralizer;

[0030] The quartz glass powder is obtained by mixing three kinds of fused silica powders of 240 mesh, 600 mesh and 1000 mesh.

[0031] Oleic acid is a surfactant;

[0032] The plasticizer is prepared from paraffin wax, beeswax and polyethylene, wherein the proportions of paraffin wax, beeswax and polyethylene in the plasticizer are 85%, 10% and 5%.

[0033] The raw materials were weighed according to the ratio in Table 1, and the silicon-based ceramic core was prepared as follows:

[0034] Dry mixing: Weigh the mineralizer, quartz powder glass powder, additives according to the predetermined ratio, put them into the mixer, mix the materials until th...

Embodiment 2

[0047] The formula of core powder is shown in Table 1.

[0048] The quartz glass powder is obtained by mixing three kinds of fused silica powders of 240 mesh, 600 mesh and 1000 mesh.

[0049] The plasticizer is prepared from paraffin wax, beeswax and polyethylene, wherein the proportions of paraffin wax, beeswax and polyethylene in the plasticizer are 85%, 10% and 5%.

[0050] Weigh the raw materials according to the above ratio, and prepare the silicon-based ceramic core according to the following method:

[0051] Dry mixing: Weigh the mineralizer, quartz powder glass powder, additives according to the predetermined ratio, put them into the mixer, mix the materials until the powder is fully mixed evenly, and dry at 103°C to constant weight after discharging to obtain the powder;

[0052]Configure plasticizer: weigh paraffin, beeswax and polyethylene according to a predetermined ratio, add it to a vacuum wax blender, heat until melted, stir evenly, continue to stir and vacuum...

Embodiment 3

[0061] The formula of core powder is shown in Table 1.

[0062] The quartz glass powder is obtained by mixing three kinds of fused silica powders of 240 mesh, 600 mesh and 1000 mesh.

[0063] The plasticizer is prepared from paraffin wax, beeswax and polyethylene, wherein the proportions of paraffin wax, beeswax and polyethylene in the plasticizer are 85%, 9% and 6%.

[0064] Weigh the raw materials according to the above ratio, and prepare the silicon-based ceramic core according to the following method:

[0065] Dry mixing: Weigh the mineralizer, quartz powder glass powder, additives according to the predetermined ratio, put them into the mixer, mix the materials until the powder is fully mixed evenly, and dry at 103°C to constant weight after discharging to obtain the powder;

[0066] Configure plasticizer: weigh paraffin, beeswax and polyethylene according to a predetermined ratio, add it to a vacuum wax blender, heat until melted, stir evenly, continue to stir and vacuum...

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Abstract

The invention provides a silica-based ceramic mold core and a preparation method thereof. The silica-based ceramic mold core and the preparation method are used for solving the problems of insufficient high-temperature intensity, great high-temperature deflection and the like of the silica-based ceramic mold core in the prior art. The invention provides the silica-based ceramic mold core with high high-temperature intensity, low high-temperature deformation and low sintering shrinkage, and the preparation method.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a silicon-based ceramic core and a preparation method thereof. Background technique [0002] The turbofan engine is currently the most mainstream engine. The turbine inlet temperature of an engine with a thrust-to-weight ratio of 10 to 10 reaches 1800K-2000K, while that of an engine with a thrust-to-weight ratio of 15 to 20 will reach 2100K to 2300K, far exceeding the melting point of superalloys for engines. As the temperature of the front inlet of the turbine continues to increase, in order to ensure the safe and reliable operation of the turbine blades in the high-temperature gas environment, advanced cooling structures and cooling methods must be adopted to reduce the temperature of the blades to below the working temperature that the material can withstand . Under the condition that the structural size of the engine remains unchanged at all, the thrust of the eng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/632C04B35/653
CPCC04B35/14C04B35/632C04B35/653C04B2235/3225C04B2235/3244C04B2235/48
Inventor 李树索杨乾宫声凯裴延铃
Owner 成都航大新材料有限公司
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