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Preparation method of inorganic suspension coating

A suspension and coating technology, which is applied in the preparation of abradable sealing coatings for liquid-phase coating and the preparation of inorganic suspension coatings, can solve the problems of complex, heat-affected process of substrates, etc., achieves improved efficiency and is suitable for The effect of industrialized scale production and obvious economic benefits

Active Publication Date: 2012-11-28
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of thermal influence on the base material and relatively complex process in the process of preparing the sealing coating by traditional thermal spraying, and to provide a low-cost, easy maintenance and adjustment, and a spray coating process that is effective on the base material. Preparation method of inorganic suspension coating for liquid phase coating without thermal influence

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] (1) Take 950mL of aluminum dihydrogen phosphate solution with a mass concentration of 30%, mix it with 60g of CrO 3 Thoroughly stir evenly, wait for CrO 3 After complete dissolution, the aluminum chromium phosphate binder solution with suitable fluidity and viscosity is obtained as a brownish red transparent solution. At this time, it is measured that the specific gravity of the binder aqueous solution is 1.29g / cm 3 , CrO in solution 3 The content is 60g / L;

[0016] (2) Weigh the component powders required for the solid phase of the suspension coating: 193.5g of titanium aluminide powder, 322.5g of silicon dioxide powder, 129g of boron nitride, and 645g of aluminum powder. The particle size distribution of the cermet composite powder components is as follows: titanium aluminide powder: 10-200 μm, silicon dioxide powder: 10-200 μm, boron nitride: 10-200 μm, aluminum powder: 10-200 μm. Put the weighed powders of each component into a drying oven and bake at 100°C for ...

specific Embodiment approach 2

[0018] (1) Take 870mL of aluminum dihydrogen phosphate with a mass concentration of 40%, mix it with 70g of CrO 3 Thoroughly stir evenly, wait for CrO 3 After complete dissolution, the aluminum chromium phosphate binder solution with suitable fluidity and viscosity is obtained as a brownish red transparent solution. At this time, it is measured that the specific gravity of the binder aqueous solution is 1.34g / cm 3 , CrO in solution 3 The content is 76g / L;

[0019] (2) Weigh the component powders required for the solid phase of the suspension coating: 130.5g of titanium aluminide powder, 216.8g of silicon dioxide powder, 86.7g of boron nitride, and 433.5g of aluminum powder. The particle size distribution of the cermet composite powder components is as follows: titanium aluminide powder: 10-200 μm, silicon dioxide powder: 10-200 μm, boron nitride: 10-200 μm, aluminum powder: 10-200 μm. Put the weighed powders of each component into a drying oven and bake at 100°C for 3 hour...

specific Embodiment approach 3

[0021] (1) Take 900mL of aluminum dihydrogen phosphate with a mass concentration of 30%, mix it with 75g of CrO 3 Thoroughly stir evenly, wait for CrO 3 After complete dissolution, the aluminum chromium phosphate binder solution with suitable fluidity and viscosity is obtained as a brownish red transparent solution. At this time, it is measured that the specific gravity of the binder aqueous solution is 1.33g / cm 3 , CrO in solution 3 The content is 78g / L;

[0022] (2) Weigh the component powders required for the solid phase of the suspension coating: 133g of titanium aluminide powder, 266g of silicon dioxide powder, 133g of boron nitride, and 665g of aluminum powder. The particle size distribution of the cermet composite powder components is as follows: titanium aluminide powder: 10-200 μm, silicon dioxide powder: 10-200 μm, boron nitride: 10-200 μm, aluminum powder: 10-200 μm. Put the weighed powders of each component into a drying oven and bake at 100°C for 3 hours, then...

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Abstract

The invention discloses a preparation method of inorganic suspension coating which is prepared by the mixing of phosphate binder and metal ceramic composite powder. The phosphate binder comprises the following components according to proportion: the concentration of AL(H2PO4)3 is 30-60 percent, and the concentration of CrO3 is 60-80g / l; and the composite powder comprises the following components according to mass percentage: 1-25 percent of Ti, 1-15 percent of Si, 5-25 percent of BN, and the balance of Al. The preparation method comprises the following steps: firstly preparing aluminium-chromium phosphate solution, then preparing the metal ceramic composite powder, and finally uniformly mixing the phosphate binder with the metal ceramic composite powder in a mechanical blending manner to prepare the inorganic suspension coating. The coating prepared by the method has the characteristics of being low in cost, easy for maintenance and adjustment, free from thermal influence on substrateduring coating, good in obturage effect and the like, can meet the low temperature and obturage requirements of various aircraft engine parts, and has wide application prospect.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a preparation method of an inorganic suspension coating, in particular to a preparation method of an abradable sealing coating for liquid phase coating. Background technique [0002] With the rapid development of the aviation industry, higher and higher requirements are put forward for the performance of aero-engines. High thrust, high efficiency, and low fuel consumption have become the general goals of aero-engine design and manufacture. In the design and manufacture of aero-engines and gas engines, clearance control measures can improve the working efficiency of the machines. According to data reports, in a high-pressure turbine, every time the gap is reduced by 0.13-0.25mm, the fuel consumption can be reduced by 0.5-1.0%, and the engine efficiency can be increased by about 2%. [0003] During the design and manufacture of aero-engines, sealing measures are required between the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34
Inventor 任先京刘海飞黄新春张鑫冀国娟彭浩然
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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