A flexible ablation resistance film and its preparation method
A resistance thin film, flexible technology, applied in the field of flexible ablation resistance thin film and its preparation, can solve the problems that affect the reliability of flexible thin film, large interface thermal stress, difficult to meet engineering applications, etc.
A resistance thin film, flexible technology, applied in the field of flexible ablation resistance thin film and its preparation, can solve the problems that affect the reliability of flexible thin film, large interface thermal stress, difficult to meet engineering applications, etc.
CN108106748BActive Publication Date: 2020-12-1148TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Embodiment 1
[0046] A flexible ablation resistive film, such as figure 1 , including a flexible substrate 1 and an ablation resistance film 8, a composite transition layer is provided between the flexible substrate 1 and the ablation resistance film 8, wherein the composite transition layer includes a sequentially deposited Si 3 N 4 Layer 4, AlN layer 5 to Al 2 o 3 Layer 6 periodic composite film.
[0047] In this embodiment, the periodic composite thin film is based on the flexible substrate 1 and presents "Si 3 N 4 Layer 4, AlN layer 5 to Al 2 o 3 Periodic change trend of layer 6". Specifically: take the flexible substrate 1 as the base surface to deposit Si in sequence 3 N 4 Layer 4, AlN layer 5, Al 2 o 3 Layer 6 forms Si 3 N 4 / AlN / Al 2 o 3 Composite thin films, periodically prepared Si 3 N 4 / AlN / Al 2 o 3 Composite thin film, obtain periodical composite thin film, namely composite transition layer.
[0048] In this embodiment, the period number of the periodic compo...
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Abstract
The invention discloses a flexible ablation resistor thin film and a preparation method thereof. The flexible ablation resistor thin film comprises a flexible substrate and an ablation resistor thin film, wherein a composite transition layer is arranged therebetween, and the composite transition layer comprises a periodic composite film formed by alternately depositing Si3N4 layers, AlN layers andAl2O3 layers. The preparation method comprises the steps of preparing the composite transition layer and preparing the ablation resistor thin film. The flexible ablation resistor thin film has the advantages of high environmental interference resistance, high reliability level and the like. The preparation method of the flexible ablation resistor thin film has the advantages of simple preparationprocess, high environmental adaptability, good reliability and the like. The flexible ablation resistor thin film can be used in a heatproof protection layer of spacecrafts such as a hypersonic aircraft, a solid rocket engine and the like, can realize ablation volume measurement in harsh environments such as high temperature and high heat flow scouring, and is of great significance to improving the application reliability of spacecrafts such as a hypersonic aircraft, a solid rocket engine and the like.
Description
technical field [0001] The invention belongs to the technical field of special film preparation, relates to an ablation resistance film and a preparation method thereof, in particular to a flexible ablation resistance film and a preparation method thereof. Background technique [0002] The heat insulation layer is mainly used in the thermal protection of solid rocket motors, re-entry vehicles and other spacecraft. The performance of the heat insulation layer directly affects the reliability of the engine, and even affects the success or failure of the rocket launch. The working environment of the heat insulation layer is very harsh. It has to withstand the ablation of high temperature and high pressure gas and the erosion of condensed phase particles. In severe cases, the protection of the inner heat insulation layer will fail, and the engine casing will burn through, resulting in engine failure. Therefore, the thickness and geometric shape of the thermal insulation layer di...
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Patent Timeline
11 Dec 2020
Publication
CN108106748B
- IPC
- G01K7/16; C23C14/06; C23C14/08; C23C14/18; C23C14/35; C23C14/58
- CPC
- C23C14/0605; C23C14/0641; C23C14/0652; C23C14/081; C23C14/185; C23C14/35; C23C14/5806; G01K7/16
- Inventors
- 陈伟; 谢锋