Nano structure hydroxyapatite/titanium composite coating and preparing method thereof

A nano-hydroxyapatite and hydroxyapatite technology, applied in coating, nanotechnology, metal material coating technology and other directions, can solve the problems of polluting the human body, low proportion of titanium particles, and difficulty in forming composite coatings, etc. Achieve the effect of improving hardness and elastic modulus, and improving uniformity

Inactive Publication Date: 2019-02-12
JIUJIANG UNIVERSITY
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Problems solved by technology

[0005] Although cold spraying method, electrodeposition method and sol-gel method can avoid thermal decomposition and chemical reaction of nano-hydroxyapatite powder phase structure, the nano-hydroxyapatite used in the formation of titanium/hydroxyapatite composite coating by cold spraying method The composition ratio of the mixed powder of titanium and pure titanium is strictly required. If the proportion of titanium particles is too low, it will be difficult to form a composite coating; the electrodeposition method and the sol-gel ...

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  • Nano structure hydroxyapatite/titanium composite coating and preparing method thereof
  • Nano structure hydroxyapatite/titanium composite coating and preparing method thereof
  • Nano structure hydroxyapatite/titanium composite coating and preparing method thereof

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preparation example Construction

[0030] The invention provides a method for preparing a nanostructured hydroxyapatite / titanium composite coating, comprising the following steps:

[0031] The nano-hydroxyapatite-titanium mixed particle suspension is mixed with atomizing gas, and the preheated substrate is sprayed by a supersonic flame spraying method to obtain a nano-structured hydroxyapatite / titanium composite coating.

[0032] The preparation method provided by the invention firstly needs to prepare nano-hydroxyapatite-titanium mixed particle suspension.

[0033] In the present invention, the solid content of the nano-hydroxyapatite-titanium mixed particle suspension is preferably 1-20%, more preferably 2-10%, and most preferably 4-8%. In the present invention, the nano-hydroxyapatite-titanium mixed particle suspension is preferably formed by mixing nano-hydroxyapatite, titanium particles and a solvent. In the present invention, the particle size of the nano-hydroxyapatite is preferably 5 nm-10 μm, more pre...

Embodiment 1

[0050] Preparation of nanostructured hydroxyapatite / titanium (mass ratio 7:3) composite coating on the surface of 316L stainless steel substrate

[0051] (1) Preparation of nano-hydroxyapatite-titanium mixed particle suspension: mix hydroxyapatite particles with an average particle size of 20 nm and titanium particles with an average particle size of 10 μm at a mass ratio of 7:3 to obtain a mixed powder ; The mixed powder was mixed with deionized water and absolute ethanol according to the mass ratio of 5:47.5:47.5 and mechanically stirred for 2 hours to obtain a suspension of nano-hydroxyapatite-titanium mixed particles;

[0052] (2) 316L stainless steel substrate preheating: adopt the supersonic flame spraying device to heat the substrate; the parameters of the heating are: the distance between the outlet end of the supersonic flame spraying spray gun and the surface of the substrate is 100mm, and the parallel movement speed of the spray gun relative to the substrate is 100mm...

Embodiment 2

[0060] Preparation of nanostructured hydroxyapatite / titanium (mass ratio 5:5) composite coating on the surface of 316L stainless steel substrate

[0061] (1) Preparation of nano-hydroxyapatite-titanium mixed particle suspension: mix hydroxyapatite particles with an average particle size of 20 nm and titanium particles with an average particle size of 10 μm at a mass ratio of 5:5 to obtain a mixed powder ; The mixed powder was mixed with deionized water and absolute ethanol according to the mass ratio of 5:47.5:47.5 and mechanically stirred for 2 hours to obtain a suspension of nano-hydroxyapatite-titanium mixed particles;

[0062] (2) 316L stainless steel substrate preheating: adopt the supersonic flame spraying device to heat the substrate; the parameters of the heating are: the distance between the outlet end of the supersonic flame spraying spray gun and the surface of the substrate is 100mm, and the parallel movement speed of the spray gun relative to the substrate is 100mm...

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Abstract

The invention provides a preparing method of a nano structure hydroxyapatite/titanium composite coating, and belongs to the technical field of coating preparing. The nano hydroxyapatite and titanium are mixed to form composite particle suspension liquid, and the proportion of the hydroxyapatite to the titanium can be adjusted at will; after the composite particle suspension liquid is mixed with atomization gas, the mixture enters a supersonic speed flame spray gun through micro holes, the temperature of mixed particles in flames is reduced, compared with conventional supersonic speed flame spraying, a solvent wrapping the peripheries of the mixed particles can absorb part of heat through volatilization, and thermal decomposition or non-crystallizing of a nano hydroxyapatite particle phasestructure is avoided; the nano hydroxyapatite and the titanium particles are sufficiently mixed in the suspension liquid, and uniformity of two phases in the composite coating is improved; part of thetitanium particles and titanium particle surface layers are oxidized in oxygen containing high-temperature flames, the problem about thermal expansion mismatching between the hydroxyapatite and the titanium particles can be solved through titanium particle oxide, the titanium particle oxide can serve as a reinforcing phase to exist in the composite coating, and the hardness and elasticity modulusof the composite coating are improved.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a nanostructured hydroxyapatite / titanium composite coating and a preparation method thereof. Background technique [0002] As a hard tissue implant material, medical metal has the advantages of high fatigue strength and long service life compared with medical ceramics and polymer materials. However, metal materials have low surface activity and even release toxic ions in the body, which limits their clinical application. Hydroxyapatite is used as a hard tissue implant material because it has the same chemical composition as human bone inorganic matter, high biological activity and can induce cell regeneration. The preparation of hydroxyapatite composite coating on the surface of medical metal can take advantage of the excellent mechanical properties of metal materials and the high biological activity of hydroxyapatite. Due to the low strength and high brittleness of...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06B82Y40/00
CPCB82Y40/00C23C4/06C23C4/129
Inventor 姚海龙胡晓珍纪岗昌王洪涛白小波张梦贤陈清宇
Owner JIUJIANG UNIVERSITY
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