Method for preparing hydroxylapatite coating by microplasma spraying

A hydroxyapatite, microbeam plasma technology, applied in the field of biomedical implant material preparation, can solve the problems of low and low utilization rate of powder, only 20-50%, premature dissolution and peeling, etc. good biological activity

Inactive Publication Date: 2009-12-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, plasma spraying with extremely high temperature is easy to decompose HA, and it is prone to premature dissolution and peeling after implantation in the organism, which cannot induce the growth of bone tissue, and the service life of the material is short
Second, the power consumption of traditional atmospheric plasma spraying is be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: The hydroxyapatite powder is sprayed onto the substrate by using a micro-beam plasma spraying system. The gas flow rate is 1.0L / min, the protective gas is industrial pure argon, the protective gas flow rate is 0.5L / min, the powder feeding gas is industrial pure argon, the powder feeding gas flow rate is 4L / min, the powder feeding rate is 0.05g / min, and the working current is 40A. Gun pendulum speed 150mm / min, stepping 2mm, spraying times 3 times, spraying distance 80mm, the obtained coating thickness is 50μm; powder utilization rate is 90%, crystallinity is 85%.

Embodiment 2

[0014] Example 2: The hydroxyapatite powder is sprayed onto the substrate by using a micro-beam plasma spraying system. The gas flow rate is 1.1L / min, the protective gas is argon-helium mixed gas, the protective gas flow rate is 0.4L / min, the powder feeding gas is argon-helium mixed gas, the powder feeding gas flow rate is 5L / min, the powder feeding rate is 0.10g / min, and the working current 35A, gun swing speed 600mm / min, stepping 3mm, spraying times 2 times, spraying distance 70mm, the coating thickness is 20μm; the powder utilization rate is 74%, and the crystallinity is 79%.

Embodiment 3

[0015] Embodiment 3: The hydroxyapatite powder is sprayed onto the substrate by using a micro-beam plasma spraying system. The gas flow rate is 1.2L / min, the protective gas is argon-helium mixed gas, the protective gas flow rate is 0.4L / min, the powder feeding gas is argon-helium mixed gas, the powder feeding gas flow rate is 5L / min, the powder feeding rate is 0.50g / min, and the working current 60A, gun swing speed 3900mm / min, stepping 2mm, spraying times 3 times, spraying distance 100mm, the coating thickness is 100μm; the powder utilization rate is 70%, and the crystallinity is 65%.

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PUM

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Abstract

The invention discloses a method for preparing a hydroxylapatite coating by microplasma spraying, which belongs to the field of implant processing and preparation in biomedical material engineering. The method adopts microplasma spraying equipment to spray dried hydroxylapatite powder onto a matrix of a biomedical implant metal material with the surface subjected to sand blasting treatment, thereby obtaining the hydroxylapatite coating with controllable crystallinity and good biological stability. The preparation of the coating by the method has simple process, and the hydroxylapatite powder has high deposition efficiency. The method can be used for depositing the hydroxylapatite coating on the surfaces of inert implant metal materials such as stainless steel, cobalt-based alloy, titanium and titanium alloy to make the surfaces of biologically inert metal matrixes biologically activated to prepare medical implant devices such as dental roots, artificial joints and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of biomedical implant materials, and in particular relates to a hydroxyapatite coating using a micro-beam plasma spraying method. Background technique [0002] In the past 10 years, the market growth rate of biomedical materials and products in the world has been maintained at around 20%-25%. The medical device industry, including medical materials, will reach the scale of the pharmaceutical products market, with large market demand, great development potential and large profits, and will become a pillar industry of the world economy in the 21st century. [0003] Hydroxyapatite (HA) is a widely used bioactive ceramic material. Its characteristics are: when combined with the original bone, no fibrous tissue will be produced at the interface, their surface can undergo selective chemical reaction with the physiological environment, and the formed interface can protect the implant. It is bonded ...

Claims

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Application Information

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IPC IPC(8): C23C4/04C23C4/12C23C4/134
Inventor 李晓延贺定勇赵秋颖周正崔丽蒋建敏班书英王智慧赵力东
Owner BEIJING UNIV OF TECH
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