A kind of molten anti-erosion ablation coating and preparation method thereof

Abstract

The invention discloses a melting erosion-resistant ablation coating and a preparation method thereof, belonging to the technical field of special coatings. The coating consists of the following components: 100-150 parts of high temperature resistant resin, 5-20 parts of chopped fibers, 30-100 parts of light filler, 20-30 parts of reinforcing filler, 20-50 parts of molten functional filler and 150- parts of solvent 200 copies. The preparation method includes the steps of resin treatment, filler mixing and coating adjustment. The formation temperature, viscosity, and surface tension of the melt can be adjusted by controlling the amount and type of the molten functional filler, so that the erosion resistance of the ablation coating can be designed according to the working conditions of the coating. The ablative coating products are prepared on the surface of the workpiece into an ablative coating of a specified thickness by spraying, brushing, rolling, scraping and other construction methods. The coating of the present invention hardly appears ablation retreat phenomenon, and the surface after ablation is smooth and the surface hardness is good.

Description

technical field [0001] The invention belongs to the field of special coatings, in particular to an ablation coating capable of resisting airflow scour through internal melting of the coating and a preparation method thereof. Background technique [0002] Ablation coating is a special coating that mainly protects the workpiece by consuming its own mass. This process of consuming itself is the ablation process of the coating. The ablation process of the material is an active thermal protection process. In the active thermal protection process, the thickness of the ablated coating will gradually decrease, the back temperature of the coating will gradually increase, and finally the coating loses its thermal protection effect. [0003] The ablation coating prepared by the existing ablation coating technology, in the process of ablation under high temperature environment, with the decomposition of the resin and other fillers inside the coating, the mechanical properties of the coa...

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Problems solved by technology

However, in the experiment of the inventor, it was found that this method has several shortcomings: the melting point of the glass component is high, and the coating is washed away without forming a complete protective melt under high scouring conditions, which cannot play an effective protective role; The viscosity of the components is low after melting, especially under the conditions of high temperature and high erosion, the melt loss on the surface of the coating is large, and it cannot play an effective protective role; the volume of the glass component shrinks significantly before and after melting, and the inside of the coating after forming a protective melt High stress leads to cracks in the coating, which reduces the thermal protection effect of the coating; after melting, the glass component has a low bonding force with other components of the coating, and tends to reunite itself, unable to form an effective protective layer

Although some of the above problems can be solved by increasing the proportion of the glass component, the proportion of the glass component is relatively large, and an excessively large proportion will lead to a higher density of the ablation coating, which cannot meet the requirements of reducing the weight of the ablation coating under various working conditions. Require

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