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A method of laser multilayer cladding ta2o5 ceramic coating on the surface of tantalum metal

A ceramic coating, metal surface technology, applied in the field of material manufacturing, can solve the problems of differences in thermophysical properties, easy cracking, poor formability, etc., to achieve good compatibility and wettability, and less reflection loss.

Active Publication Date: 2018-10-23
上海远葆知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that due to the large difference in thermophysical properties between ceramic and metal substrates, ceramic coatings directly cladding metal surfaces generally have poor formability, easy cracking, and porous
However, due to the significant difference in thermophysical properties between most metals and ceramics, it is necessary to try a specific combination of metal and ceramic materials within a wide range of material selection, and there are few reports in the literature

Method used

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  • A method of laser multilayer cladding ta2o5 ceramic coating on the surface of tantalum metal
  • A method of laser multilayer cladding ta2o5 ceramic coating on the surface of tantalum metal
  • A method of laser multilayer cladding ta2o5 ceramic coating on the surface of tantalum metal

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Experimental program
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Effect test

Embodiment 1

[0027] Purchase commercial Ta from the market 2 o 5 Ceramic powder and pure tantalum metal are used as coating materials and substrates. First, the surface of the tantalum metal material to be laser clad is decontaminated, derusted and smoothed. Subsequently, the Ta 2 o 5 The ceramic powder is pre-spread on the tantalum metal surface with a thickness of 0.8mm. Then, CO 2 A cross-flow laser is used for laser cladding of the coating. The laser process parameters are: laser power 1.5kW, scanning speed 300mm / min, lap rate 30%, and the thickness of the first layer of coating after cladding is about 0.2mm. Then, repeat the above steps in the first layer Ta 2 o 5 The surface of the coating is sequentially clad with the second, third and fourth layers of Ta 2 o 5 coating. figure 1 and figure 2 Shown are laser multilayer cladding Ta 2 o 5 The surface morphology and cross-sectional structure of the coating, the cladding Ta can be seen from the figure 2 o 5 The surface mo...

Embodiment 2

[0029] Purchase commercial Ta from the market 2 o 5 Ceramic powder and tantalum tungsten (TaW12) high temperature alloy are used as the substrate. First, the surface of the tantalum-tungsten alloy to be laser clad is decontaminated, derusted and smoothed. Subsequently, the Ta 2 o 5 The ceramic powder is pre-spread on the tantalum metal surface with a thickness of 2mm. Then, CO 2 A cross-flow laser is used for laser cladding of the coating. The laser process parameters are: laser power 2.0kW, scanning speed 200mm / min, lap rate 40%, and the thickness of the first layer of coating after cladding is about 0.5mm. Then, repeat the above steps in the first layer Ta 2 o 5 The surface of the coating is sequentially clad with 8 layers of Ta 2 o 5 coating. The prepared coating has a final thickness of about 4mm after cladding, and the cladding quality of the coating is excellent, dense, without pores, and the phase structure is a single Ta 2 o 5 .

Embodiment 3

[0031] Purchase commercial Ta from the market 2 o 5 Ceramic powder and tantalum niobium (TaNb20) high temperature alloy are used as the matrix. First, the surface of the tantalum-niobium alloy to be laser clad is decontaminated, derusted and smoothed. Subsequently, the Ta 2 o 5 The ceramic powder is pre-spread on the tantalum metal surface with a thickness of 1mm. Then, CO 2 A cross-flow laser is used for laser cladding of the coating. The laser process parameters are: laser power 1.8kW, scanning speed 500mm / min, overlap rate 35%, and the thickness of the first layer of coating after cladding is about 0.3mm. Then, repeat the above steps in the previous layer Ta 2 o 5 The surface of the coating is successively clad with six layers of Ta 2 o 5 coating. The prepared coating has a final thickness of about 1.8mm after cladding, and the cladding quality of the coating is excellent, dense, without pores, and the phase structure is a single Ta 2 o 5 .

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Abstract

The invention discloses a method for laser multilayer cladding of a Ta2O5 ceramic coating on a tantalum metal surface and belongs to the technical field of material manufacturing. According to the method, good light transmittance of Ta2O5 ceramic powder and good compatibility between the Ta2O5 ceramic powder and a tantalum-based alloy are utilized, and a powder pre-arranging method is adopted for conducting direct multilayer cladding of the single Ta2O5 ceramic coating with a certain size thickness on the surface of the tantalum-based alloy. The method is easy to operate, the condition limitation on powder is little, inert gas shield is not needed in the cladding process, and the manufacturing cost is low. According to the method, the Ta2O5 ceramic coating prepared through laser multilayer cladding on the surface of the tantalum-based metal has good cladding performance such as the uniform texture, the good compactness and few air holes and a single Ta2O5 phase structure, and the Ta2O5 ceramic coating is suitable for the application field of preparing implant coatings and high-temperature and wear-resisting and optical coatings on Ta-based metal surfaces and other application fields.

Description

technical field [0001] The invention belongs to the technical field of material manufacturing, and in particular relates to a tantalum metal surface laser multi-layer cladding preparation with a certain size and thickness Ta 2 o 5 Methods of ceramic coating. Background technique [0002] Refractory metal Ta and its alloys are widely used in human bone and joint replacement materials and high-temperature aerospace materials because of their stable properties, corrosion resistance, and high temperature resistance. In recent years, the preparation of Ta on the surface of tantalum-based metals 2 o 5 Ceramic coatings have gained a lot of attention in the field of material preparation. The study found that the hardness of tantalum metal is low, and the refractory metal oxide Ta 2 o 5 Not only the melting point is as high as 1872°C, but also the high hardness of the ceramic phase makes it suitable for heat-resistant, wear-resistant, thermal corrosion-resistant and thermal bar...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/10
Inventor 张晖
Owner 上海远葆知识产权服务有限公司