Preparation method of zirconium diboride and silicon carbide high-temperature antioxidant coating

A high-temperature anti-oxidation and zirconium diboride technology, which is applied in the coating, metal material coating process, fusion spraying, etc., can solve the problems of low bonding strength, poor oxidation resistance of the coating, and high porosity of the coating. Achieve the effects of reducing porosity, improving coating bonding strength, and avoiding oxidation

Active Publication Date: 2013-12-04
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The coating prepared by the above method has high porosity, low

Method used

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  • Preparation method of zirconium diboride and silicon carbide high-temperature antioxidant coating
  • Preparation method of zirconium diboride and silicon carbide high-temperature antioxidant coating

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Example Embodiment

[0026] Example 1

[0027] ZrB of this embodiment 2 -SiC composite powder is composed of the following components by mass percentage: ZrB 2 75%, SiC25%.

[0028] 1) Batching ball mill: ZrB with a particle size of 5~15μm 2 The powder and the 0.5-1μm SiC powder are mixed at a mass ratio of 75:25, and then the mixed powder and the binder (the mass ratio of polystyrene, carboxymethyl cellulose, and polyvinyl alcohol is 35:35:30) are mixed at 90 : Mix with a mass ratio of 10, add 2 times the weight of the mixture with distilled water, and mix into a slurry ball mill for 20 hours;

[0029] 2) Spray drying: Add the slurry obtained in step 1) to the dispersant with a mass ratio of 1% (the mass ratio of glycerol, isobutanol, and tributyrin phosphate is 20:35:45), in the spray drying tower Internal atomization and drying, the outlet temperature of the drying tower is controlled within the range of 150 ℃ to make granulated powder;

[0030] 3) Sintering compaction: Put the granulated powder obtai...

Example Embodiment

[0035] Example 2

[0036] In this embodiment, ZrB 2 -The mass percentage of SiC coated composite powder was changed to: ZrB 2 70%, SiC 30%.

[0037] 1) Batching ball mill: ZrB with a particle size of 5~15μm 2 The powder and the 0.5-1μm SiC powder are mixed at a mass ratio of 70:30, and then the mixed powder and the binder (the mass ratio of polystyrene, carboxymethyl cellulose, and polyvinyl alcohol is 40:30:30) are mixed at 95 : Mix with a mass ratio of 5, add 1.5 times the weight of the mixture with distilled water, and mix into a slurry ball mill for 25h;

[0038] 2) Spray drying: Add the slurry obtained in step 1) to the dispersant with a mass ratio of 1% (the mass ratio of glycerol, isobutanol, and tributyrin phosphate is 25:35:40), and then add it to the spray drying tower Internal atomization and drying, the outlet temperature of the drying tower is controlled within the range of 200°C to make granulated powder;

[0039] 3) Sintering compaction: Put the powder obtained in step...

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Abstract

The invention relates to a preparation method of zirconium diboride and silicon carbide high-temperature antioxidant coating, belongs to the technical field of thermal spraying and particularly relates to a preparation method of material surface high-temperature antioxidant coating. ZrB2-SiC coated composite powder is prepared by spray-drying, so that volatilization of SiC during spraying is prevented; the SiC helps further improve high-temperature oxidization resistance of the coating. The ZrB2-SiC composite coating is prepared by means of ultralow-pressure plasma spraying, so that oxidization of the ZrB2-SiC composite powder during spraying is avoided effectively, porosity of the coating can be reduced and bonding strength of the coating can be improved. The prepared ZrB2-SiC composite powder is not larger than 45s/50g in mobility and 2-3.0g/cm<3> in apparent density; the prepared coating is 7-10% in porosity and 20MPa in bonding strength.

Description

technical field [0001] The invention relates to a method for preparing a zirconium diboride-silicon carbide high-temperature anti-oxidation coating, which belongs to the technical field of thermal spraying, and in particular to a method for preparing a high-temperature anti-oxidation coating on the surface of a material. Background technique [0002] High-temperature alloys have good high-temperature mechanical and creep properties, and are widely used in industrial fields such as aviation, aerospace, ships, and power generation. In particular, nickel-based single crystal alloys can be effectively used for their superior high-temperature durability and creep resistance. Improving the capacity and thermal efficiency of engines has been widely used in advanced aeroengines, ground gas engines and other power devices, and thus has attracted the attention of many researchers. With the increase of service temperature, the problem of high temperature oxidation resistance of superal...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/12C04B35/58C23C4/134C23C4/137
Inventor 倪立勇吴朝军戚鹏杨杰
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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