Method for preparing carboxyl apatite coating by single-chamber sacrificial anode hydrothermal synthesis

A technology of hydroxyapatite and sacrificial anode, applied in coating, metal material coating process, gaseous chemical plating, etc., can solve the problems of expensive equipment and raw materials, unsuitable for porous metal surface spraying, etc.

Inactive Publication Date: 2006-05-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the plasma spraying method is a linear process, it is not suitable for spraying on porous metal surfaces
Another disadvantage is that the equipment and raw materials for plasma spraying are expensive

Method used

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  • Method for preparing carboxyl apatite coating by single-chamber sacrificial anode hydrothermal synthesis
  • Method for preparing carboxyl apatite coating by single-chamber sacrificial anode hydrothermal synthesis
  • Method for preparing carboxyl apatite coating by single-chamber sacrificial anode hydrothermal synthesis

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] The industrial pure titanium plate is machined into 60×10×0.8mm, polished with water-grinding paper, rinsed with water, degreased with ethanol or acetone, and dried for later use. Machining the magnesium alloy sacrificial anode to 30×20×20mm, drilling a threaded hole in the middle of the upper surface, connecting a brass rod with a thread at one end to the sample of the sacrificial anode, polishing the surface of the sacrificial anode with water abrasive paper, rinsing with water, removing with ethanol or acetone oil and dry. The upper surface of the anode and part of the surface of the brass rod are coated with silica gel.

[0029] The composition of the solution for preparing the initial coating is:

[0030] Ca(NO 3 ) 2 0.04mol / L

[0031] NH 4 h 2 PO 4 0.024mol / L

[0032] Attached at room temperature figure 1 connect. The ratio of active sacrificial anode area to titanium substrate deposition area was 3. After reacting for about 8 hours, take out th...

example 2

[0036] The Ti6Al4V alloy plate was machined into 60×10×1.5mm, polished with water-grinding sandpaper, rinsed with cold water, degreased with ethanol or acetone, and dried for later use. Refer to Example 1 for the processing method of the magnesium alloy anode.

[0037] The composition of the solution for preparing the initial coating is:

[0038] Ca(NO 3 ) 20.02mol / L

[0039] NH 4 h 2 PO 4 0.012mol / L

[0040] After the temperature of the solution reaches 80°C, press the attached figure 1 connect. The ratio of active sacrificial anode area to Ti6Al4V alloy substrate surface area is 3. After reacting for about 80 minutes, take out the sample, rinse it with cold water, and dry it. At this time, a coating about 110 μm thick can be deposited on the surface of the Ti6Al4V alloy plate. The coating is uniform and smooth, and it is well combined with the substrate. Electron probe analysis showed that there was no magnesium element present on the initial coating. The co...

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Abstract

The invention relates to single room sacrificial anode-water heat compounding hydroxyapatite coating. The process includes making primary coating and water heating process. The primary coating has no magnesium element existing. The interface binding power could reach to 7MPa by adjusting the time to making primary coating, the thickness of the coating. The invention is simple technology, easy to operate and has wide application range.

Description

technical field [0001] The invention belongs to the technical field of preparation of bioactive ceramic hydroxyapatite coating. Background technique [0002] Hydroxyapatite (hydroxyapatite, molecular formula Ca 10 (PO 4 ) 6 (OH) 2 or Ca 5 (PO 4 ) 3 OH) is the main inorganic component of human and animal bones and teeth, has good biocompatibility and biological activity, and can form a strong chemical bond with bone. Under the action of body fluids, hydroxyapatite partially degrades, releases free calcium and phosphorus, is absorbed and utilized by human tissues, induces the growth of new tissues, and thus produces bone conduction, which has aroused widespread interest among materials and medical workers. focus on. However, hydroxyapatite has high brittleness, low strength, and lower flexural strength and fracture toughness than artificial compact bone, which limits its application in the weight-bearing parts of the human body. Medical metal materials have high stren...

Claims

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Application Information

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IPC IPC(8): C23C16/30C23C16/46C23F13/14
Inventor 梁成浩陈邦义陈婉吴波王华
Owner DALIAN UNIV OF TECH
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