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Method for preparing preferentially-oriented hydroxyapatite coating with atmospheric plasma spraying technology

A technology of hydroxyapatite and preferred orientation is applied in the field of artificial implants of biomedical materials to achieve the effect of simple process

Inactive Publication Date: 2018-06-05
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, hydroxyapatite coatings prepared by plasma spraying have been widely used in the restoration of orthopedic and dental implants, but there are few reports on the preparation of hydroxyapatite coatings with c-preferential orientation by plasma spraying. Hydroxyapatite coatings with strong c-axis preferred orientation prepared by radio frequency plasma spraying (RF-TPS) and microplasma spraying methods
However, there is no report about the preparation method with strong c-axis preferred orientation prepared by atmospheric plasma spraying method.

Method used

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  • Method for preparing preferentially-oriented hydroxyapatite coating with atmospheric plasma spraying technology
  • Method for preparing preferentially-oriented hydroxyapatite coating with atmospheric plasma spraying technology
  • Method for preparing preferentially-oriented hydroxyapatite coating with atmospheric plasma spraying technology

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Atmospheric plasma spraying equipment is used to spray hydroxyapatite powder on the substrate. The spraying process parameters are: spraying current 330A, spraying voltage 50V, spraying distance 60mm, argon flow rate 23.5SLPM, powder feeding rate 6g / min, powder feeding The carrier gas flow rate was 10.5 SLPM, and the spraying times were 3 times. The obtained coating had a strong c-axis preferred orientation and a crystallinity of 89%.

Embodiment 2

[0024] Atmospheric plasma spraying equipment is used to spray hydroxyapatite powder on the substrate. The spraying process parameters are: spraying current 340A, spraying voltage 50V, spraying distance 60mm, argon flow rate 23.5SLPM, powder feeding rate 7g / min, feeding The powder-carrying gas flow rate is 12SLPM, and the number of spraying times is 3 times. The obtained coating has a strong c-axis preferred orientation and a crystallinity of 85.11%.

Embodiment 3

[0026] Atmospheric plasma spraying equipment is used to spray hydroxyapatite powder on the substrate. The spraying process parameters are: spraying current 350A, spraying voltage 50V, spraying distance 60mm, argon flow rate 25SLPM, powder feeding rate 6.5g / min, the powder carrier gas flow rate is 12SLPM, and the number of spraying times is 3 times. The obtained coating has a strong c-axis preferred orientation and a crystallinity of 95%.

[0027] Function and effect of embodiment

[0028] figure 1 It is the XRD spectrum of the hydroxyapatite with c-axis preferred orientation prepared in the examples of the present invention. figure 2 It is a cross-sectional SEM image of the hydroxyapatite coating with c-axis preferred orientation prepared in the embodiment of the present invention. image 3 This is the SEM image of the corrosion cross-section of the hydroxyapatite coating with c-axis preferred orientation prepared in the embodiment of the present invention. It can be furth...

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Abstract

The invention discloses a method for preparing preferentially-oriented hydroxyapatite coating with an atmospheric plasma spraying technology, and belongs to the relevant field of biomedical material artificial implants. Dried nanometer aggregated spherical hydroxyapatite powder which is 38 to 45mu m in particle size is taken as a spraying material. A highly-preferentially-oriented hydroxyapatite coating can be prepared according to atmospheric plasma spraying process parameters provided by the method, and a large quantity of columnar crystals vertical the surface of the coating exist in the coating. The method has a simple process for preparing the highly-preferentially-oriented hydroxyapatite coating, the prepared coating is 85 to 95 percent in crystalizing degree, and the coating and a substrate are combined well.

Description

technical field [0001] The invention belongs to the related field of biomedical material artificial implants, and in particular relates to the preparation of a hydroxyapatite coating with strong c-axis preferred orientation by using an atmospheric plasma spraying method. Background technique [0002] With the intensification of the aging trend, the accelerated pace of life, the frequent occurrence of diseases and accidents, etc., the number of patients with joint injuries and bone injuries continues to increase, which makes the demand for biomedical implant materials continue to increase. And with the development of modern science and technology and the improvement of medical level, patients' requirements for quality of life have been significantly improved, and the performance requirements for biomedical implant materials have also been increased. [0003] Hydroxyapatite has a chemical composition and crystal structure similar to the main mineral components in human bones a...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/04A61L27/32A61L27/50
CPCC23C4/134A61L27/32A61L27/50A61L2420/02A61L2430/02A61L2430/12C23C4/04
Inventor 贺定勇刘晓梅周正王国红王曾洁吴旭谈震
Owner BEIJING UNIV OF TECH
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