Zr-based ceramic coating protection method for surface of refractory metal material

Abstract

The invention relates to an ablation-resistant protection technology for refractory metal materials and particularly relates to a Zr-based ceramic coating protection method for the surface of a refractory metal material. The method comprises the following steps of firstly, degreasing a refractory metal and grinding with sand paper; secondly, depositing Zr-based ceramic powder on the surface of the refractory metal to form a Zr-based ceramic powder pre-coated layer by virtue of an electrophoretic technology; and finally, cladding the Zr-based ceramic powder pre-coated layer on the surface of the refractory metal to obtain the Zr-based ceramic coating by virtue of a laser cladding technology. According to the method, in order to solve the problem of relatively low application temperature of the silicide protective coating applied in the refractory metal, the Zr-based ceramic coating is adopted to solve the application limitation of the refractory metal so that the ablation resistance of the refractory metal matrix at above 2000 DEG C is effectively increased.

Description

technical field [0001] The invention relates to anti-ablation protection technology of refractory metal materials, more specifically, relates to a protection method of Zr-based ceramic coating on the surface of refractory metal materials. Background technique [0002] Refractory metals are widely used in the aerospace field due to their high melting point, high hardness and good high temperature strength. However, poor oxidation resistance limits the application of refractory metals in oxidizing environments, especially in ablative environments where temperatures exceed 2000 °C. Therefore, a protective coating must be applied. At present, the protective coatings used for refractory metals are mainly silicide coatings, but their protective temperature does not exceed 1500 °C. In order to meet the application of ultra-high temperature ablation environment, it is necessary to develop new protective coatings. Ultra-high temperature ceramics with high melting point and high ha...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the application temperature of the silicide protective coating currently applied to refractory metals is low, the object of the present invention is to provide a method for protecting the surface of refractory metal materials with Zr-based ceramic coatings, using Zr-based ceramic coatings to solve the problem of Restrictions on the application of refractory metals can effectively improve the ablation resistance of refractory metal substrates above 2000 °C

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