Method for preparing tantalum biological coating on surfaces of magnesium and magnesium alloy

A bio-coating and magnesium alloy technology, applied in metal material coating process, coating, solid-state diffusion coating, etc.

Pending Publication Date: 2022-04-22
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are relatively few preparation technologies and applications for preparing tantalum-containing coatings on the surface of magnesium alloys. Therefore, it is necessary to study and realize tantalum biocoatings with good corrosion resistance on the surface of magnesium alloys, good biological safety, and a certain bone-promoting function. Layer preparation technology is of great significance for the application of bio-magnesium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The concrete preparation steps of embodiment 1 are:

[0038] 1) Preparation of porous micro-arc oxidation ceramic coatings on the surface of magnesium alloys: Mg-Gd-Dy-Zr (Mg: 95.5wt%, Gd: 2wt%, Dy: 2wt%, Zr : 0.5wt%) alloy surface grinding to 2000#, micro-arc oxidation surface modification treatment, the electrolyte system is: nano-tantalum powder (particle size 50 ~ 100nm) 2g / L, sodium hexametaphosphate 3g / L, potassium fluoride 5g / L. The constant voltage mode of micro-arc oxidation is adopted, the processing time is 3min, the voltage is set to 400V, the power frequency is 1000Hz, and the duty cycle is 40%; the volume percentage of the porous micro-arc oxidation ceramic coating is composed of: 50vol% MgO, 20vol% Mg 3 (PO 4 ) 2 , 10vol% MgF 2 , 1vol% TaO, the obtained porous micro-arc oxidation ceramic coating has a melting point of 1200° C., a thickness of 10-12 μm, a pore diameter of 8-10 μm, and a porosity of 30%.

[0039] 2) Perform double-glow plasma tantalum ...

Embodiment 2

[0041] The concrete preparation steps of embodiment 2 are:

[0042] 1) Preparation of porous micro-arc oxidation ceramic coatings on the surface of magnesium alloys: Mg-Gd-Dy-Zr (Mg: 95.5wt%, Gd: 2wt%, Dy: 2wt%, Zr : 0.5wt%) alloy surface grinding to 2000#, micro-arc oxidation surface modification treatment, the electrolyte system is: nano-tantalum powder (particle size 50 ~ 100nm) 1g / L, sodium hexametaphosphate 3g / L, potassium fluoride 8g / L. The constant voltage mode of micro-arc oxidation is adopted, the processing time is 5min, the voltage is set to 410V, the power frequency is 1000Hz, and the duty cycle is 40%; the volume percentage of the porous micro-arc oxidation ceramic coating is composed of: 40vol% MgO, 10vol% Mg 3 (PO 4 ) 2 , 15vol% MgF 2 , 3vol% TaO, the obtained porous micro-arc oxidation ceramic coating has a melting point of 1000° C., a thickness of 13-15 μm, a pore diameter of 8-10 μm, and a porosity of 32%.

[0043] 2) Perform double-glow plasma tantalum ...

Embodiment 3

[0045] The concrete preparation steps of embodiment 3 are:

[0046] 1) Preparation of porous micro-arc oxidation ceramic coating on the surface of magnesium alloy: using sandpaper with different roughness The surface of the Mg-Sr (Mg mass percentage content is 97wt%) alloy surface is polished to 2000#, and the surface modification treatment is carried out by micro-arc oxidation. Sodium metaphosphate 2g / L, potassium fluoride 5g / L. The constant voltage mode of micro-arc oxidation is adopted, the processing time is 5min, the voltage is set to 420V, the power frequency is 800Hz, and the duty cycle is 30%; the volume percentage of the porous micro-arc oxidation ceramic coating is composed of: 35vol% MgO, 20vol% Mg 3 (PO 4 ) 2 , 10vol% MgF 2 , 1vol% TaO, the obtained porous micro-arc oxidation ceramic coating has a melting point of 1050° C., a thickness of 12-14 μm, a pore diameter of 6-8 μm, and a porosity of 25%.

[0047] 2) Perform double-glow plasma tantalum plating on the ...

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Abstract

The invention discloses a method for preparing a tantalum bio-coating on the surface of magnesium and magnesium alloy, which is characterized by comprising the following preparation steps: 1) preparing a porous micro-arc oxidation ceramic coating on the surface of magnesium/magnesium alloy: suspending and immersing the magnesium/magnesium alloy into an electrolyte as an anode, taking a stainless steel electrolytic bath as a cathode, and performing micro-arc oxidation in a constant-voltage mode to prepare a porous micro-arc oxidation ceramic coating on the surface of the magnesium/magnesium alloy; the specific parameters are as follows: the voltage is 350-450 V, the power supply frequency is 800-1200 Hz, the positive and negative duty ratio is 30-50%, the treatment time is 2-10 min, and the electrolyte system comprises 0.5-2 g/L of tantalum powder, 2-5 g/L of sodium hexametaphosphate and 5-10 g/L of potassium fluoride; and 2) carrying out double glow plasma tantalum plating on the surface of the porous micro-arc oxidation ceramic coating to form a tantalum diffusion plating layer. According to the method, appropriate electrolyte components and micro-arc oxidation parameters are selected, the melting point of the ceramic coating prepared through micro-arc oxidation on the surface of the magnesium alloy can reach 1000-1500 DEG C, the increased surface temperature can provide a higher working temperature interval for double-glow ion tantalum plating, and therefore the coating thickness and the coating quality of double-glow ion tantalum plating are improved.

Description

technical field [0001] The invention belongs to the technical field of metal material surface coatings, and in particular relates to a method for preparing a tantalum biological coating on the surface of magnesium and magnesium alloys. Background technique [0002] With the rapid development of biomedical materials research and the continuous improvement of medical technology, biomaterials have been more widely used in the field of orthopedics. There are countless people with bone defects or incomplete limbs caused by trauma, inflammation, tumors and congenital deformities in the human body. It is necessary to develop and manufacture a large number of artificial joints, artificial bones, bone filling materials, and various internal and external fixation devices. At present, orthopedic implant materials are the most demanded category of biomaterial-related products in the world, accounting for 37.5% of the global biomaterial market, mainly including spine products, trauma pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30C23C14/32C23C14/16C23C10/08C22F1/18
CPCC25D11/30C25D11/024C25D11/026C23C14/32C23C14/16C23C10/08C22F1/18
Inventor 刘辰陈小虎韩俊刚曹召勋赵枢明付玉王荫洋邵志文徐永东朱秀荣
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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