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Method for preparing bioactive micro-arc oxidation ceramic coating with macroscopic/microscopic dual-stage pore structure by two-step method on medical titanium surface

A micro-arc oxidation and pore structure technology, applied in surface reaction electrolytic coatings, coatings, electrolytic coatings, etc., can solve the problems of non-biological activity of coatings and complicated preparation process, and achieve guaranteed functionality, simple methods, The effect of improving bond strength

Active Publication Date: 2016-02-24
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems that the existing method for preparing double-stage pore micro-arc oxidation ceramic coatings has a complicated preparation process and the prepared coating does not have biological activity, and provides a two-step method for the preparation of macroscopic / microscopic coatings on medical titanium surfaces. Method for Bioactive Micro-arc Oxidation Ceramic Coatings with Two-Stage Pore Structure

Method used

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  • Method for preparing bioactive micro-arc oxidation ceramic coating with macroscopic/microscopic dual-stage pore structure by two-step method on medical titanium surface
  • Method for preparing bioactive micro-arc oxidation ceramic coating with macroscopic/microscopic dual-stage pore structure by two-step method on medical titanium surface
  • Method for preparing bioactive micro-arc oxidation ceramic coating with macroscopic/microscopic dual-stage pore structure by two-step method on medical titanium surface

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine figure 1 In this embodiment, the method for preparing a bioactive micro-arc oxidation ceramic coating with a macroscopic / microscopic dual-stage pore structure by a two-step method on the surface of medical titanium is carried out according to the following steps:

[0017] 1. Titanium sample surface pretreatment: Use 300#, 700#, 1000# and 1200# sandpaper to grind and polish the titanium flat sample sequentially on the metallographic sample pre-grinder to obtain the polished titanium flat sample, and then Use acetone, absolute ethanol and deionized water to ultrasonically clean the ground and polished titanium plate samples respectively. Acetone is used for ultrasonic cleaning for 5 minutes to 30 minutes, absolute ethanol is used for ultrasonic cleaning for 5 minutes to 30 minutes, and deionized water is used for ultrasonic cleaning. 5min to 30min, then dry in an oven at a temperature of 40°C to 60°C for 30min to 2h to obtain a pr...

specific Embodiment approach 2

[0028] Embodiment 2: This embodiment differs from Embodiment 1 in that the titanium plate sample described in step 1 is TA2 titanium alloy, TA3 titanium alloy, TA4 titanium alloy or TC4 titanium alloy. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0029] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the electrolytic solution containing sodium nitrate described in step 2 is solvent with deionized water, with sodium silicate, calcium acetate, calcium dihydrogen phosphate , EDTA-2Na (disodium ethylenediaminetetraacetic acid), sodium hydroxide and sodium nitrate are solutes; and the concentration of sodium silicate in the electrolyte containing sodium nitrate is 5g / L~8g / L, calcium acetate The concentration of calcium dihydrogen phosphate is 6g / L~10g / L, the concentration of calcium dihydrogen phosphate is 5g / L~8g / L, the concentration of EDTA-2Na (disodium ethylenediaminetetraacetic acid) is 10g / L~20g / L, hydrogen The concentration of sodium oxide is 10g / L-15g / L, and the concentration of sodium nitrate is 3g / L-15g / L. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a biological activity micro-arc oxidation ceramic coating with a macroscopic / microcosmic double-stage pore structure on the surface of medical titanium through a two-step method, relates to a method for preparing micro-arc oxidation ceramic coating, and solves the problems that a conventional method for preparing double-stage pore micro-arc oxidation ceramic coating is more complicated in preparation process, and the prepared coating has no biological activity. The method comprises the following steps: first, carrying out surface pretreatment on a titanium slab sample, then, placing the pretreated titanium slab sample in sodium nitrate containing micro-arc oxidation electrolyte to be primarily oxidized, next, replacing the oxidized sample in silicon-calcium-phosphate-sodium electrolyte to be secondarily oxidized, washing for 3-5 times, and drying to obtain the biological activity micro-arc oxidation ceramic coating generated on the surface of the titanium slab. The invention can be applicable to the preparation of the biological activity micro-arc oxidation ceramic coating with the macroscopic / microcosmic double-stage pore structure on the surface of medical titanium.

Description

technical field [0001] The invention relates to a method for preparing a micro-arc oxidation ceramic coating. Background technique [0002] Using micro-arc oxidation technology, an oxide layer can be formed on the surface of Ti and its alloys. At the same time, by adjusting the composition of the electrolyte and controlling the parameters of the electrical process, the composition, structure and structure of the coating can also be adjusted to endow the coating material with different functions. This is the use of plasma chemical and electrochemical reactions involved in the method, and the deposition of colloidal particles. According to the needs in the field of medical titanium implants, bioactive treatment of the titanium surface is required. And studies have shown that the existence of macroscopic micropores on the surface of the implant is more conducive to the combination of new bone and the implant, thereby overcoming the problem of implant loosening and failure cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
Inventor 魏大庆周睿冯唯成夙周玉
Owner HARBIN INST OF TECH
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