Crucible with Al2O3 anti-corrosion coating and method for producing Al2O3 anti-corrosion coating by slip-casting shaping process

An anti-corrosion and crucible technology, applied in the direction of crucible furnace, furnace type, lighting and heating equipment, etc., can solve the problem of loose combination of coarse particles and fine particles, uneven grain size of crucible matrix, non-densification and resistance to melt permeability, etc. problem, achieve the effect of improving uneven grain size, uniform distribution, and improving melt erosion resistance

Inactive Publication Date: 2009-08-05
JIANGSU HANGTAI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Al currently used for smelting 2 o 3 The crucible is usually prepared by grading coarse particles. The grain size of the crucible matrix is ​​uneven, the combination of coarse particles and fine particles is loose, and there are even large pores. Mixed into the molten material, affecting the performance of the molten material
In addition, the non-dense surface of the crucible has poor resistance to melt penetration, which seriously affects the service life of the crucible

Method used

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  • Crucible with Al2O3 anti-corrosion coating and method for producing Al2O3 anti-corrosion coating by slip-casting shaping process
  • Crucible with Al2O3 anti-corrosion coating and method for producing Al2O3 anti-corrosion coating by slip-casting shaping process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The first step: making Al 2 o 3 Anti-erosion slurry

[0048] Al 2 o 3 Anti-corrosion paste made of multi-grade Al 2 o 3 Composed of raw material powder, ammonium polyacrylate, polyvinyl alcohol (PVA) and deionized water, each component is fully mixed to obtain a slurry with good fluidity. Among them, 167.00g of multi-grade Al was added to 100ml of deionized water 2 o 3 Raw material powder, the ammonium polyacrylate of 1.67g and the polyvinyl alcohol of 1.60g;

[0049] The 100g of multilevel Al 2 o 3 The raw material powder contains primary Al with a particle size of 5 μm 2 o 3 Powder 65g, secondary Al with a particle size of 25μm 2 o 3 30g of powder and the remainder of tertiary Al with a particle size of 45μm 2 o 3 Powder;

[0050] Step 2: Select the crucible base

[0051] Brush the Al produced by Beijing Dongfang Dingxinxin Technology Co., Ltd. 2 o 3 The crucible is cleaned, and the crucible matrix is ​​obtained after cleaning up;

[0052] The thir...

Embodiment 2

[0061] The first step: making Al 2 o 3 Anti-erosion slurry

[0062] Al 2 o 3 Anti-corrosion paste made of multi-grade Al 2 o 3 Composed of raw material powder, gum arabic, polyvinyl alcohol (PVA) and deionized water, each component is fully mixed to obtain a slurry with good fluidity. Among them, 97.50g of multi-grade Al was added to 100ml of deionized water 2 o 3 Raw material powder, gum arabic of 1.17g and polyvinyl alcohol of 1.20g;

[0063] The 100g of multilevel Al 2 o 3 The raw material powder contains primary Al with a particle size of 5 μm 2 o 3 Powder 80g, secondary Al with a particle size of 25μm 2 o 3 5g of powder and the remainder of tertiary Al with a particle size of 45μm 2 o 3 Powder;

[0064] Step 2: Select the crucible base

[0065] Brush the Al produced by Beijing Dongfang Dingxin Technology Co., Ltd. 2 o 3 The crucible is cleaned, and the crucible matrix is ​​obtained after cleaning up;

[0066] The third step: making Al 2 o 3 Anti-eros...

Embodiment 3

[0075] The first step: making Al 2 o 3 Anti-erosion slurry

[0076] Al 2 o 3 Anti-corrosion paste made of multi-grade Al 2 o 3 Composed of raw material powder, gum arabic, carboxymethyl cellulose and deionized water, each component is fully mixed to obtain a slurry with good fluidity. Among them, 319.09g of multi-grade Al was added to 100ml of deionized water 2 o 3 Raw material powder, the gum arabic of 2.60g and the carboxymethyl cellulose of 2.50g;

[0077] The 100g of multilevel Al 2 o 3 The raw material powder contains primary Al with a particle size of 5 μm 2 o 3 Powder 50g, secondary Al with a particle size of 25μm 2 o 3 15g of powder and the remainder of tertiary Al with a particle size of 45μm 2 o 3 Powder;

[0078] Step 2: Select the crucible base

[0079] Brush the Al produced by Beijing Dongfang Dingxin Technology Co., Ltd. 2 o 3 The crucible is cleaned, and the crucible matrix 1 is obtained after cleaning;

[0080] The third step: making Al 2 o...

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Abstract

The invention discloses a copple with an Al2O3 erosion-resistant coating and a method for preparing the Al2O3 erosion-resistant coating with a slip casting moulding process. The copple with the Al2O3 erosion-resistant coating is formed by preparing an Al2O3 erosion-resistant sizing agent on the inner wall of the copple base with the slip casting moulding process, forming the Al2O3 erosion-resistant coating with depth from 0.5 mm to 10 mm. The Al2O3 erosion-resistant sizing agent is obtained by evenly mixing multilevel Al2O3 raw material powder, dispersant, adhesive and deionized water. The copple with the Al2O3 erosion-resistant coating has melting temperature of 1650 DEG C, thereby being capable of meeting melting of the alloy of high-activity metal including Ti, Al, Nb, Hf, rare earth, and the like, such as the melting of various nickel base high-temperature alloy.

Description

technical field [0001] The invention relates to a coating material made on the inner wall of a crucible. More specifically, it refers to a kind of Al 2 o 3 Made on the inner wall of the existing crucible matrix, and then sintered at high temperature to obtain Al 2 o 3 New crucible with corrosion resistant coating. Background technique [0002] Superalloys are the key materials for manufacturing turbine engines and play an important role in the fields of aviation and aerospace. Therefore, the melting of superalloys is one of the focuses of research on material processing in recent years. The research results show that the impurity elements and Inclusions have a significant impact on the properties of alloys, so ultra-pure smelting of superalloys is of great significance, and higher requirements are put forward for the corrosion resistance of melting crucibles. [0003] Al 2 o 3 Ceramics have become one of the most widely used ceramic materials in the world today due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B14/10C04B35/66C04B35/10C04B41/65
Inventor 唐晓霞张花蕊高明张虎
Owner JIANGSU HANGTAI NEW MATERIAL CO LTD
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