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Adhesive for ceramic core, preparation method and application thereof

A technology of ceramic cores and adhesives, which is applied in the direction of cores, casting molding equipment, casting molds, etc., and can solve problems such as easy cracking and deformation of bonded combined ceramic cores, and affecting the use effect of ceramic cores.

Active Publication Date: 2018-02-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, it is found that during the use of the combined ceramic core, the bonded combined ceramic core is easy to crack and deform, which seriously affects the use effect of this type of ceramic core.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The refractory material used is corundum powder, the pore-forming agent is micron-level carbon powder, and the high-temperature-resistant sol is silica sol; the mass ratio of refractory powder particle size is 80 mesh: 400 mesh: 1000 mesh = 1:2:1; The adhesive accounts for 5% of the total mass of the adhesive; the mass ratio of the refractory material to the high temperature resistant sol is 4:1.

[0013] Mix the refractory material and pore-forming agent evenly, and mix the mixed powder and high-temperature-resistant sol evenly to prepare a bonding slurry. The bonding surface of alumina-based ceramic parts needs to be roughened (sanded) to bond ceramics. Parts, so that different parts are connected by bonding slurry as a transition part, and the bonding protrusions are flattened. After bonding the combined ceramic core with the adhesive, it needs to be dried in the air at room temperature for 2 hours; then sintered at high temperature The sintering temperature is 50°C ...

Embodiment 2

[0015] The refractory material is mullite powder, the pore-forming agent is micron-level polyethylene powder, and the high-temperature-resistant sol is aluminum sol; the mass ratio of refractory powder particle size is 100 mesh: 600 mesh: 2000 mesh = 1:2:1; Pore ​​agent accounts for 10% of the total mass of the adhesive; the mass ratio of refractory material to high temperature resistant sol is 4:1.

[0016] Mix the refractory material and pore-forming agent evenly, and mix the mixed powder and high-temperature-resistant sol evenly to prepare a bonding slurry. The bonding surface of the silica-based ceramic parts needs to be roughened (sanded), and bonded For ceramic parts, different parts are connected by bonding slurry as a transition part, and the bonding protrusions are scraped off. After the adhesive is bonded to the combined ceramic core, it needs to be dried in the air at room temperature for 5 hours; then use high temperature The sintering method is strengthened, the s...

Embodiment 3

[0018] The refractory material used is quartz glass powder, the pore-forming agent is micron-level wax powder, and the high-temperature-resistant sol is aluminum sol; the mass ratio of refractory powder particle size is 100 mesh: 800 mesh: 1200 mesh = 1:3:1; The porosity agent accounts for 6% of the total mass of the adhesive; the mass ratio of the refractory material to the high temperature resistant sol is 4:1.

[0019] Mix the refractory material and pore-forming agent evenly, and mix the mixed powder and high-temperature-resistant sol evenly to prepare a bonding slurry. The bonding surface of the silica-based ceramic parts needs to be roughened (sanded), and bonded For ceramic parts, different parts are connected by bonding slurry as a transition part, and the bonding protrusions are scraped off. After the adhesive is bonded to the combined ceramic core, it needs to be dried in the air at room temperature for 6 hours; then use high temperature The sintering method is stren...

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PUM

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Abstract

The object of the present invention is to provide an effective adhesive for ceramic core parts and a preparation method thereof, wherein the adhesive is prepared by mixing refractory powder, pore-forming agent and high temperature resistant sol, wherein the refractory is One or more of corundum powder, mullite powder, zircon powder or quartz glass powder; pore-forming agent is one of micron carbon powder, polyethylene powder or paraffin powder; high temperature resistant sol is silica sol, yttrium One of sol or aluminum sol. Refractory powder, pore-forming agent and high temperature resistant sol are mixed into powder liquid and bonded to ceramic parts, so that different parts are connected by refractory powder and high temperature resistant sol as a transition part, and then strengthened by high temperature sintering to ensure excessive bonding Some of them have similar structure and properties to the ceramic core, and then a combined ceramic core with better comprehensive properties is obtained.

Description

technical field [0001] The invention belongs to the technical field of precision casting, and particularly provides an adhesive for composite ceramic cores, a preparation method and an application thereof. Background technique [0002] The inner cavities of superalloy blades and castings with complex structures are usually formed with ceramic cores. When a ceramic material cannot meet the core preparation process requirements and core performance requirements at the same time, or when one molding cannot meet the structural requirements of different parts of the ceramic core at the same time, the composite ceramic core process must be used. Composite ceramic core is a ceramic core formed by bonding more than one ceramic material or more than one ceramic core parts. At present, the cavity structure used to prepare single crystal blades or oriented columnar crystal blades is relatively complicated, and the use of composite ceramic cores is a very effective method for preparing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/18B22C9/10
Inventor 姜卫国肖久寒李凯文楼琅洪
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI