Crucible with Y2O3 anti-corrosion coating and method for producing Y2O3 anti-corrosion coating by slip-casting shaping process

A Y2O3, anti-erosion technology, used in crucible furnaces, furnace types, lighting and heating equipment, etc., can solve the problems of loose combination of coarse particles and fine particles, uneven grain size of the crucible matrix, and easy mixing of materials into the melt. , to achieve the effect of improving the resistance to melt erosion, improving the purity and small porosity

CN101498549AActive Publication Date: 2009-08-05BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-08-05

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Abstract

The invention discloses a copple with an Y2O3 erosion-resistant coating and a method for preparing the Y2O3 erosion-resistant coating with a slip casting moulding process. The copple with the Y2O3 erosion-resistant coating is formed by preparing an Y2O3 erosion-resistant sizing agent on the inner wall of the copple base with the slip casting moulding process, forming the Y2O3 erosion-resistant coating with depth from 0.5 mm to 8 mm. The Y2O3 erosion-resistant sizing agent is obtained by evenly mixing multilevel Y2O3 raw material powder, dispersant, adhesive and deionized water. The copple with the Y2O3 erosion-resistant coating has melting temperature from 1600 DEG C to 2000 DEG C, thereby being capable of meeting melting of high-activity metal alloy such as Ti alloy, Nb alloy, rare earth alloy and alloy with high-activity elements of Ti, Al, Nb, Hf, rare earth, and the like.
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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 method of casting Y 2 o 3 It is made on the inner wall of the existing crucible matrix, and then sintered at high temperature to obtain the Y 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 chemical stability and corrosion resistance of melting crucibles.

[0003] In recent years, ceramic crucibles have played an increasingly...

Examples

Embodiment 1

[0049] Example 1 in Al 2 O 3 Coated Y on the crucible 2 O 3 Erosion resistant coating

[0050] Step 1: Make Y 2 O 3 Corrosion Resistant Slurry

[0051] Y 2 O 3 Anti-erosion slurry made of multi-grade Y 2 O 3 It is composed of raw material powder, ammonium polyacrylate, polyvinyl alcohol (PVA) and deionized water. After the components are fully mixed, a slurry with good fluidity is obtained. Among them, 214.00g of multi-stage Y is added to 100ml of deionized water. 2 O 3 Raw material powder, 1.50g of ammonium polyacrylate and 2.00g of polyvinyl alcohol (PVA);

[0052] The 100g multistage Y 2 O 3 The raw material powder contains primary Y with a particle size of 5 μm 2 O 3 65g powder, secondary Y with particle size of 25μm 2 O 3 30g of powder and the balance of third-grade Y with a particle size of 45μm 2 O 3 powder;

[0053] Step 2: Select the crucible base

[0054] The brushes will be made of Al, which will be produced by Beijing Dongfang Dingxin Techno...

Embodiment 2

[0063] Example 2in Y 2 O 3 Coated Y on the crucible 2 O 3 Erosion resistant coating

[0064] Step 1: Make Y 2 O 3 Corrosion Resistant Slurry

[0065] Y 2 O 3 Anti-erosion slurry made of multi-grade Y 2 O 3 It is composed of raw material powder, gum arabic, polyvinyl alcohol (PAA) and deionized water. After each component is fully mixed, a slurry with good fluidity is obtained. Among them, 125.00g of multi-grade Y is added to 100ml of deionized water. 2 O 3 Raw material powder, 1.25g of gum arabic and 3.20g of polyvinyl alcohol (PVA);

[0066] The 100g multistage Y 2 O 3 The raw material powder contains primary Y with a particle size of 5 μm 2 O 3 80g powder, secondary Y with particle size of 25μm 2 O 3 5g of powder and the balance of tertiary Y with a particle size of 45μm 2 O 3 powder;

[0067] Step 2: Select the crucible base

[0068] The Y developed by Beijing University of Aeronautics and Astronautics is 2 O 3 The crucible is cleaned, and the cruci...

Embodiment 3

[0077] Example 3 in ZrO 2 Coated Y on the crucible 2 O 3 Erosion resistant coating

[0078] Step 1: Make Y 2 O 3 Corrosion Resistant Slurry

[0079] Y 2 O 3 Anti-erosion slurry made of multi-grade Y 2 O 3 It consists of raw material powder, gum arabic, carboxymethyl cellulose and deionized water. After each component is fully mixed, a slurry with good fluidity is obtained. Among them, 409.09g of multi-stage Y is added to 100ml of deionized water. 2 O 3 Raw material powder, 5.00g of gum arabic and 0.80g of carboxymethyl cellulose;

[0080] The 100g multistage Y 2 O 3 The raw material powder contains primary Y with a particle size of 5 μm 2 O 3 50g powder, secondary Y with particle size of 25μm 2 O 3 15g of powder and the balance of third-grade Y with a particle size of 45μm 2 O 3 powder;

[0081] Step 2: Select the crucible base

[0082] ZrO produced by Beijing Dongfang Dingxin Technology Co., Ltd. 2 The crucible is cleaned, and the crucible base 1 is ob...