A method for the protection of Zr-based ceramic coatings on the surface of refractory metal materials
A technology for refractory metal and ceramic coatings, applied in coatings, electrolytic coatings, electrophoretic plating, etc., can solve the problem of low application temperature of silicide protective coatings, achieve improved ablation resistance, low temperature, and avoid The effect of phase change or embrittlement
Active Publication Date: 2017-11-03
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF21 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
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 ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
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. First, the refractory metal is degreased and sanded; then, the Zr-based ceramic powder is deposited on the surface of the refractory metal by electrophoresis technology to form a Zr-based ceramic powder preset layer; after that, the Zr-based ceramic powder is deposited by laser cladding technology. The pre-set layer is clad on the surface of the refractory metal to obtain a Zr-based ceramic coating. The present invention aims at the problem that the application temperature of the silicide protective coating currently applied to refractory metals is relatively low, and adopts Zr-based ceramic coatings, which solves the limitation on the application of refractory metals and effectively improves the temperature of the refractory metal matrix above 2000°C. anti-ablation performance.
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
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