Titanium alloy surface TiO2-FHA biological gradient active coating and preparation method thereof

A technology of active coating and titanium alloy, applied in coating, electrolytic coating, medical science, etc., to achieve good mechanical properties and biocompatibility

Inactive Publication Date: 2009-06-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Ti 6 al 4 Preparation of TiO on the surface of V substrate by electrophoretic co-depositio...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Prepare 1mol / L Ca(NO 3 ) 2 4H 2 O and 1mol / L (NH 4 ) 2 HPO 4 solution, corresponding to the corresponding Ca 10 (PO 4 ) 6 (OH)F NH 4 F added to (NH 4 ) 2 HPO 4 In the solution, control the molar ratio of Ca and P to 1.67:1, stir to fully dissolve the solids in each solution, and drop concentrated ammonia water into each solution to make the pH value of each solution 11.

[0048] Will (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 4H 2 In the O solution, vigorously stir while titrating, and keep the pH value of the mixed solution with ammonia water not less than 10.5. After the reaction is complete, the mixed solution is placed at room temperature and continues to stir for 4 hours. Let the mixed solution stand for 24 hours, pour out the supernatant, and heat the remaining mixed solution on a heating furnace until there is no obvious ammonia smell. The remaining mixed solution was washed with distilled water until the pH value ...

Embodiment 2

[0053] Prepare 1mol / L Ca(NO 3 ) 2 4H 2 O and 1mol / L (NH 4 ) 2 HPO 4 solution, corresponding to the corresponding Ca 10 (PO 4 ) 6 [(OH) 0.75 f 0.25 ] 2 NH of value 4 F added to (NH 4 ) 2 HPO 4 In the solution, control the molar ratio of Ca and P to 1.67:1, stir to fully dissolve the solids in each solution, and drop concentrated ammonia water into each solution to make the pH value of each solution 11. Will (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 4H 2 In the O solution, vigorously stir while titrating, and keep the pH value of the mixed solution at 11 with ammonia water. After the reaction is complete, the mixed solution is placed at room temperature and continues to stir for 8 h. Let the mixed solution stand for 24 hours, pour out the supernatant, and heat the remaining mixed solution on a heating furnace until there is no obvious ammonia smell. The remaining mixed solution was washed with distilled water until the pH valu...

Embodiment 3

[0059] Prepare 0.5mol / L Ca(NO 3 ) 2 4H 2 O and 0.5mol / L (NH 4 ) 2 HPO 4 solution, the preparation of Ca 10 (PO 4 ) 6 (OH) 2, stir, control the molar ratio of Ca and P to 1.67:1, fully dissolve the solids in each solution, drop concentrated ammonia water into each solution, and make each solution pH 11. Will (NH 4 ) 2 HPO 4 The solution was slowly added dropwise to the Ca(NO 3 ) 2 4H 2 In the O solution, stir vigorously while titrating, and keep the pH value of the mixed solution at 11 with ammonia water. After the reaction is complete, the mixed solution is placed at room temperature and continues to stir for 6 h. Let the mixed solution stand for 24 hours, pour out the supernatant, and heat the remaining mixed solution on a heating furnace until there is no obvious ammonia smell. The remaining mixed solution was washed with distilled water until the pH value was 7, and finally filtered with absolute ethanol. The resulting filter cake was dried in a drying oven ...

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Abstract

The invention discloses a bioactive gradient coating on the surface of titanium alloy and a preparation method thereof. The composition of the coating is TiO2-FHA. The preparation method comprises: preparing FHA powder by a precipitation method; and preparing the TiO2-FHA biological gradient coating on a titanium alloy substrate by an electrophoretic codeposition-sintering method and adjusting the composition mixture ratio of TiO2 and the FHA in a deposition solution, wherein the mass ratio of the TiO2 to the FHA is between 5:1 and 1:5. The thickness of the gradient coating is controlled by changing the deposition voltage and the deposition time, wherein the deposition voltage is between 10 and 80 volts, and the deposition time is between 15 and 90 seconds; and the coating after sintering has superior binding ability with the substrate, and has superior biocompatibility.

Description

technical field [0001] The invention belongs to the technical field of preparation of medical titanium alloy surface coating, and relates to TiO on the surface of titanium alloy 2 -FHA biogradient active coating and preparation method thereof, specifically electrophoretic deposition-sintering method on Ti 6 Al 4 Preparation of TiO on V alloy surface 2 -FHA biogradient active coating. Background technique [0002] Bioactive ceramic coating / titanium alloy composites, which possess both sufficient strength and toughness and good biocompatibility, are widely used as artificial joint replacement materials. [0003] Currently, the most widely used bioceramic coatings and their preparation methods are hydroxyapatite (Hydroxyapatite, abbreviated as HA) and plasma spraying. HA is unstable during plasma spraying and decomposes into easy-to-dissolve impurity phases such as calcium phosphate and tetracalcium phosphate, resulting in a decrease in the bonding strength of the coating t...

Claims

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Application Information

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IPC IPC(8): A61L27/30A61L27/06C25D13/02
Inventor 周宏明曾麟易丹青
Owner CENT SOUTH UNIV
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