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Method for preparing composite film layer through depositing hydroxylapatite on magnesium alloy micro-arc oxidation film

A technology of hydroxyapatite and micro-arc oxidation, which is applied in anodic oxidation, superimposed layer plating, metal material coating technology, etc., can solve the problem of poor mechanical properties of hydroxyapatite, biological activity and corrosion resistance of magnesium alloys No high problems, achieve good uniformity, high bonding strength, and improve corrosion resistance

Active Publication Date: 2015-04-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problems of poor mechanical properties of existing hydroxyapatite and low biological activity and corrosion resistance of magnesium alloys, and provides a method for preparing a composite film layer of magnesium alloy micro-arc oxidation film deposited hydroxyapatite

Method used

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  • Method for preparing composite film layer through depositing hydroxylapatite on magnesium alloy micro-arc oxidation film
  • Method for preparing composite film layer through depositing hydroxylapatite on magnesium alloy micro-arc oxidation film
  • Method for preparing composite film layer through depositing hydroxylapatite on magnesium alloy micro-arc oxidation film

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specific Embodiment approach 1

[0014] Embodiment 1: In this embodiment, a method for preparing a magnesium alloy micro-arc oxidation film to deposit a composite film of hydroxyapatite is carried out through the following steps:

[0015] 1. Preparation of the micro-arc oxidation film on the surface of the magnesium alloy: place the magnesium alloy with the oxide film removed in the electrolyte as the anode, and use the stainless steel plate as the cathode, perform micro-arc oxidation for 3 to 10 minutes, then take out the magnesium alloy, wash it and dry it , to obtain a magnesium alloy with a micro-arc oxidation film layer on the surface; wherein, the electrolyte solution contains sodium hydroxide with a concentration of 3.5g / L to 4.5g / L and a hexapolysaccharide of 4.5g / L to 5g / L Sodium polyphosphate, the temperature of the electrolyte is 15-40°C, and the solvent of the electrolyte is water; the parameters of the micro-arc oxidation process are: constant power 136W, current density 2A / cm 2 , the frequency i...

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the oxide film is removed from the magnesium alloy described in step 1 by using SiC sandpaper to remove the oxide film. The specific method is: first use 400 Polish the magnesium alloy with sandpaper for 9 minutes, then polish it with 800-grit sandpaper for 6 minutes, and then polish it with 1000-grit sandpaper for 3 minutes. Finally, rinse it and dry it before use. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the drying in step 1 is carried out at a temperature of 80°C to 100°C. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing a composite film layer through depositing hydroxylapatite on a magnesium alloy micro-arc oxidation film, relates to a method for preparing the composite film layer through depositing hydroxylapatite on the surface of the magnesium alloy micro-arc oxidation film, and aims at solving the problems of poor mechanical performance of the existing hydroxylapatite and low bioactivity and corrosion resistance of a magnesium alloy. The method disclosed by the invention comprises the following steps: step one, preparing the micro-arc oxidation film layer on the surface of the magnesium alloy; step two, preparing hydroxylapatite powder; and step three, preparing a hydroxylapatite suspension, placing the magnesium alloy with the micro-arc oxidation film layer on the surface and the hydroxylapatite powder suspension in a sealed reactor, carrying out hydrothermal reaction, taking the resulting product out for drying to finish the preparation method of the composite film layer with the hydroxylapatite deposited on the magnesium alloy micro-arc oxidation film. The preparation method disclosed by the invention is applied to the chemical field.

Description

technical field [0001] The invention relates to a method for preparing a composite film layer of hydroxyapatite deposited on a magnesium alloy micro-arc oxidation film. Background technique [0002] As the main component of bone, hydroxyapatite has good biocompatibility, so it has become a good artificial bone substitute material and has a good application prospect in biomaterials. However, artificial bioceramics directly prepared from hydroxyapatite powder are brittle, fragile, low in strength, and poor in mechanical compatibility with human bone, which limits their application as bone implant materials. The density of magnesium alloy is equivalent to that of human bone, and it has high specific strength and specific stiffness; the modulus of elasticity comparable to that of human bone can be obtained by adjusting the process, but its poor corrosion resistance and low biological activity prevent it from being used as a bone material. Development of implant materials. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/04C23C24/08C25D11/30
Inventor 姚忠平夏琦兴沈巧香胡冰姜兆华
Owner HARBIN INST OF TECH