Slurry for micro-engine thrust chamber and preparation method and application of slurry

Abstract

The invention relates to slurry for a micro-engine thrust chamber and a preparation method and application of the slurry and belongs to the technical field of two-component liquid rocket orbit / attitude control engines. The thrust of a micro-engine ranges from 0.1 N to 5 N, the throat diameter of the micro-engine thrust chamber ranges from 0.3 mm to 1.0 mm, and a spray pipe on the micro-engine thrust chamber is made of niobium-tungsten alloy. The slurry is stable in performance and uniform in ingredient, the concentration of the slurry is adjusted, when the micro spray pipe with the throat diameter below 1 mm is coated with a coating through the slurry, the throat portion is not likely to be blocked, and meanwhile the coating thickness of the coating can be guaranteed. After the inner surface and the outer surface of the spray pipe of the micro thrust chamber with the throat diameter below 1 mm are dip-coated with the slurry, the high-temperature oxidation resistance of the spray pipe is guaranteed, and meanwhile the throat diameter of the spray pipe can meet design requirements.

Description

technical field [0001] The invention relates to a slurry for a thrust chamber of a micro engine and its preparation method and application, and belongs to the technical field of bicomponent liquid rocket orbit / attitude control engines. The thrust of the micro engine is 0.1-5N, and the micro engine The diameter of the throat of the thrust chamber is 0.3-1.0mm, and the material of the nozzle on the thrust chamber of the micro engine is niobium-tungsten alloy. Background technique [0002] The micro propulsion system is mainly used for precise attitude adjustment and orbit positioning of micro space vehicles such as micro satellites. It has low cost, small size, low power consumption, light weight, small thrust (generally 0.1-5N), and high integration At the same time, this type of engine needs to have the ability to start multiple times, the number of pulses can reach tens of thousands, and the working life in orbit is long. It usually needs to run in orbit for several to ten ...

AI Technical Summary

Problems solved by technology

[0003] Due to the small size of the micro nozzle, especially the diameter of the throat is below 1mm, when using the existing nozzle coating formula and preparation process to prepare the micro nozzle, the throat coating of the nozzle is easy to accumulate and cause blockage, or The coating is difficult to paste. The coating cannot reach the required thickness, and it is difficult to prepare the silicide coating on the inner and outer surfaces of the micro-nozzle, so that the performance and life of the micro-nozzle cannot meet the service requirements.

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