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Reinforcing method for silicon-based ceramic core with excellent mechanical property

A ceramic core and silicon-based technology, applied in the field of silicon-based ceramic core preparation, can solve problems such as poor high temperature performance, fracture, deformation, etc., and achieve the effects of enhancing high temperature bending resistance, enhancing room temperature strength, and excellent physical properties.

Pending Publication Date: 2022-06-24
兴化市兴东铸钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing ceramic cores often deform or even break when casting orientation and single crystal hollow blades due to poor high-temperature performance, which seriously affects the yield of blades, and the quality of silicon-based ceramic cores will affect the quality of turbine blades. have a significant impact on engine performance

Method used

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  • Reinforcing method for silicon-based ceramic core with excellent mechanical property
  • Reinforcing method for silicon-based ceramic core with excellent mechanical property
  • Reinforcing method for silicon-based ceramic core with excellent mechanical property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] see Figure 1-3 , the present invention provides the following technical solutions: a silicon-based ceramic core with excellent mechanical properties, which is made up of the following raw materials in parts by weight: 30% of porous quartz glass powder, 30% of mullite mineralizer, plasticizer 30%, silicon carbide whisker 10%, silicon oxide 5%, metal oxide sol 1%, silicone resin strengthening agent 3%, and the balance is silicon carbide powder.

[0032] Specifically, the strengthening agent is methyl phenyl silicone resin, and its solid content is 45%.

[0033] Specifically, the plasticizer is a mixture of 11% beeswax, 3% polyethylene, and the balance paraffin.

[0034] Specifically, the particle size of the quartz glass powder is between 190 meshes.

[0035] Specifically, the particle size of the mullite mineralizer is 280 mesh.

[0036] A method for reinforcing a silicon-based ceramic core with excellent mechanical properties, comprising the following steps:

[003...

Embodiment 2

[0047] see Figure 1-3 , the present invention provides the following technical solutions: a silicon-based ceramic core with excellent mechanical properties, which is made up of the following raw materials in parts by weight: 40% of porous quartz glass powder, 12% of mullite mineralizer, plasticizer 20%, silicon carbide whisker 13%, silicon oxide 8%, metal oxide sol 3%, silicone resin strengthening agent 4%, and the balance is silicon carbide powder.

[0048] Specifically, the strengthening agent is methyl phenyl silicone resin, and its solid content is 45%.

[0049] Specifically, the plasticizer is a mixture of 13% beeswax, 4% polyethylene, and the rest is paraffin.

[0050] Specifically, the particle size of the quartz glass powder is between 210 meshes.

[0051] Specifically, the particle size of the mullite mineralizer is 300 mesh.

[0052] A method for reinforcing a silicon-based ceramic core with excellent mechanical properties, comprising the following steps:

[0053]...

Embodiment 3

[0063] see Figure 1-3 , the present invention provides the following technical scheme: a silicon-based ceramic core with excellent mechanical properties, which is made up of the following raw materials in parts by weight: 50% of porous quartz glass powder, 15% of mullite mineralizer, plasticizer 22%, silicon carbide whisker 15%, silicon oxide 10%, metal oxide sol 5%, silicone resin strengthening agent 5%, and the balance is silicon carbide powder.

[0064] Specifically, the strengthening agent is methyl phenyl silicone resin, and its solid content is 45%.

[0065] Specifically, the plasticizer is a mixture of 14% beeswax, 5% polyethylene, and the balance paraffin.

[0066] Specifically, the particle size of the quartz glass powder is between 230 meshes.

[0067] Specifically, the particle size of the mullite mineralizer is 310 meshes.

[0068] A method for reinforcing a silicon-based ceramic core with excellent mechanical properties, comprising the following steps:

[006...

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Abstract

The invention belongs to the technical field of silicon-based ceramic core preparation, and particularly relates to a silicon-based ceramic core with excellent mechanical properties. The silicon carbide ceramic is prepared from the following raw materials in parts by weight: 30-50% of porous quartz glass powder, 10-15% of a mullite mineralizer, 18-22% of a plasticizer, 10-15% of silicon carbide whiskers, 5-10% of silicon oxide, 1-5% of metal oxide sol, 3-5% of a silicon resin enhancer and the balance of silicon carbide powder. According to the invention, a layer of metal oxide sol is pre-sprayed on the surface of the silicon-based ceramic core, the silicon resin reinforcer is permeated into the silicon-based ceramic core under a vacuum condition, and the reinforced ceramic core has excellent physical properties through silicon carbide oxidation compounding and connection support of the porous quartz glass powder as a core skeleton; the high temperature resistance, the impact resistance, the high temperature resistance, the service life and the like of the product can be improved, and the excellent ceramic core with a compact internal structure and a high-strength and high-stability carbide and nitride outer layer for toughening and reinforcing can be obtained.

Description

technical field [0001] The invention belongs to the technical field of silicon-based ceramic core preparation, in particular to a reinforcing method for silicon-based ceramic cores with excellent mechanical properties. Background technique [0002] The ceramic core is the abbreviation of a ceramic core used in the investment casting process. As an adapter for forming the cavity of the casting, its function is to form the inner cavity structure of the casting, and jointly ensure the casting with the outer mold and the mold shell. Dimensional accuracy requirements for the cavity. Ceramic cores are usually used to form the cavity of castings with complex shapes or difficult to form. As a special process method to simplify the process difficulty, reduce the cost and improve the product qualification rate, the silicon-based ceramic core has a small expansion coefficient and excellent resistance to rapid cooling. It has the advantages of rapid heating capacity, high mechanical st...

Claims

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Application Information

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IPC IPC(8): C04B35/14C04B35/81C04B35/622
CPCC04B35/14C04B35/622C04B2235/3463C04B2235/5276C04B2235/3826C04B2235/483C04B2235/616C04B2235/3852C04B2235/3817C04B2235/6587
Inventor 周长军郭云龙杜凤洋唐荣俊唐荣彪
Owner 兴化市兴东铸钢有限公司
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