A preparation method of double nano-hydroxyapatite/titanium composite gradient coating

A technology of nano-hydroxyapatite and hydroxyapatite, which is applied in coatings, pharmaceutical formulations, medical science, etc., can solve problems such as difficult coating, phase change and brittle cracking, and achieve good compactness, low cost, The effect of improving biological activity and stability

Active Publication Date: 2021-01-08
XINYU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plasma spraying is a common method for preparing bioceramic coatings such as hydroxyapatite. Vacuum plasma spraying has made practical progress in preparing repaired bioapatite coatings, but it is prone to phase change and brittle cracks during high temperature processes. And it is not easy to prepare coatings with surface nanostructures

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select hydroxyapatite powder with a particle size of 10nm and titanium powder with a particle size of 20nm under the protection of an inert gas (pure argon) to prepare hydroxyapatite / Titanium composite powder, in which the ball-to-material ratio is 15:1, the rotational speed is 150rpm, and the ball milling time is 6h; the Ti6Al4V substrate is subjected to sandblasting and roughening treatment, and then a porous micron with a thickness of about 100 μm is deposited on the surface of the Ti6Al4V substrate by a cold spraying system. Titanium coating, wherein, the particle size of the spraying powder is -200 mesh micron titanium particles, and the spraying gas is N 2 , accelerating gas pressure 2.0MPa, powder feeding gas pressure 2.2MPa, spraying temperature 250°C, spraying distance 10mm, spraying gun moving speed 100mm / s; Coating, coating thickness 50μm, spraying gas using N 2 , the acceleration gas pressure is 1.6MPa, the powder feeding gas pressure is 1.8MPa, the sprayi...

Embodiment 2

[0023] Select hydroxyapatite powder with a particle size of 20nm and titanium powder with a particle size of 30nm under the protection of an inert gas (pure argon) to prepare hydroxyapatite / Titanium composite powder, in which the ball-to-material ratio is 15:1, the rotational speed is 150rpm, and the ball milling time is 6h; the Ti6Al4V substrate is subjected to sandblasting and roughening treatment, and then a porous micron with a thickness of about 100 μm is deposited on the surface of the Ti6Al4V substrate by a cold spraying system. Titanium coating, wherein, the particle size of the spraying powder is -200 mesh micron titanium particles, and the spraying gas is N 2 , accelerating gas pressure 1.8MPa, powder feeding gas pressure 2.0MPa, spraying temperature 350°C, spraying distance 10mm, spray gun moving speed 100mm / s; Coating, coating thickness 50μm, spraying gas using N 2 , the acceleration gas pressure is 2.0MPa, the powder feeding gas pressure is 2.2MPa, the spraying ...

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Abstract

The invention discloses a preparation method of a double nano-hydroxyapatite / titanium compound gradient coating. The preparation method comprises the following steps: carrying out mechanical ball milling on hydroxyapatite with a nano-structure and titanium powder under the protection of inert gas to prepare nano-hydroxyapatite / titanium compound powder with the hydroxyapatite content of 30 to 70 volume percent; sieving and collecting hydroxyapatite / titanium compound powder with the grain diameter of 10 to 30mum; carrying out sand spraying and roughening treatment on a Ti6A14V matrix; depositinga micron porous titanium coating with the thickness of 50 to 100mum on the surface of a matrix material by adopting a cold spraying technology; then preparing the hydroxyapatite / titanium compound gradient coating on the surface of the porous titanium coating by adopting the cold spraying technology. The preparation method disclosed by the invention can realize a phase structure and component transplanting, interparticle combination is easy to control and interlayer combination is improved; the prepared coating has good density; the preparation method is simple to operate and relatively low incost and is especially suitable for industrial application and popularization.

Description

technical field [0001] The invention relates to the field of coating preparation, in particular to a preparation method of a double nano-hydroxyapatite / titanium composite gradient coating. Background technique [0002] Hard tissue graft materials are composite structures of human organ repair materials, which need to have good biological properties and certain strength and toughness. Hydroxyapatite is often used as a biological coating material on metal surfaces such as titanium alloys due to its good biological properties. However, pure hydroxyapatite has poor mechanical properties, low fracture toughness and bending strength, and is affected by high temperature during the preparation process. It causes changes in the composition and structure and does not match the thermal expansion coefficient of the metal substrate, resulting in low bonding strength and stress cracking. Therefore, it is necessary to suppress the phase transition, structural changes and harmful phases dur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/56A61L27/50A61L27/06A61L27/32A61L27/30C23C24/04
CPCA61L27/06A61L27/306A61L27/32A61L27/50A61L27/56A61L2400/12C23C24/04
Inventor 陈枭李承娣胡瑶张小伟
Owner XINYU UNIV
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