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

A refractory metal and ceramic coating technology, applied in metal material coating process, coating, electrolytic coating, etc., can solve the problem of low application temperature of silicide protective coating, achieve improved ablation resistance, low temperature , good combination effect

Active Publication Date: 2015-04-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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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 met

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

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Embodiment Construction

[0026] In a specific embodiment, the present invention provides a Zr-based ceramic coating protection method on the surface of a refractory metal material: first, degreasing and sanding the refractory metal; then, using electrophoresis technology to deposit Zr-based ceramic powder on the refractory The surface of the molten metal is formed to form a Zr-based ceramic powder pre-layer; after that, the laser cladding technology is used to clad the Zr-based ceramic powder pre-layer on the refractory metal surface to obtain an ablation-resistant Zr-based ceramic coating.

[0027] Hereinafter, the present invention will be described in further detail through examples and accompanying drawings.

[0028] Example: with ZrB 2 The application of ceramic coating in improving the ablation resistance of Ta-2.5wt.% W alloy is an example.

[0029] 1. Preparation of coating:

[0030] 1) Substrate pretreatment

[0031] Process the Ta-2.5wt.%W substrate into a sample with a size of 15mm long ...

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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...

Claims

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Application Information

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IPC IPC(8): C25D13/02C23C24/10C23F17/00
Inventor 董志宏彭晓王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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