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Process for preparing hydroxy apatite / titanium oxide gradient coating

A technology of hydroxyapatite and gradient coating, which is applied in coatings, electrolytic inorganic material coatings, etc., can solve the problems of increased bonding strength, large differences in physical and chemical properties, and achieve high bonding strength and good biological activity Effect

Inactive Publication Date: 2005-06-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in general, the physical and chemical properties of the HAp ceramic coating and the metal substrate are quite different, and the great changes on both sides of the interface still limit the improvement of the bonding strength.

Method used

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  • Process for preparing hydroxy apatite / titanium oxide gradient coating
  • Process for preparing hydroxy apatite / titanium oxide gradient coating
  • Process for preparing hydroxy apatite / titanium oxide gradient coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1. Use the sulfuric acid solution that concentration is 98g / l, with titanium as anode, stainless steel as cathode, adopt direct current power source 150V, be that the micro-arc oxidation 2.5min under the condition of 5cm at pole distance. Form a titanium oxide layer with a thickness of about 10 μm on the titanium surface; then use Ca(H 2 PO 4 ) 2 ·H 2 O) and CaCl 2 2H 2 O prepared with calcium 0.01mol / l, phosphorus 0.006mol / l, H 2 o 2 A 6%wt solution with a pH of 5.5 and a cathodic potential of -0.8V vs SCE was deposited at 70°C for 2000 seconds. Its scanning electron microscope photo is attached figure 1 , X-ray diffraction analysis showed that the coating was composed of titanium dioxide and HAp.

Embodiment 2

[0039] Embodiment 2. feed liquid contains the Ca(H of 25g / l 2 PO 4 ) 2 ·H 2 O solution, with titanium as the anode and stainless steel as the cathode, using a DC power supply of 240V cell voltage, and micro-arc oxidation for 3min under the condition of a pole distance of 5cm. Then in Ca(H 2 PO 4 ) 2 ·H 2 O) and Ca(CH 3 COO) 2 Prepare calcium 0.1mol / l, phosphorus 0.06mol / l, H 2 o 2 3% wt, solution pH 3.5, deposition at 25°C for 2000 s at -3.5V vs SCE cathodic potential. X-ray diffraction analysis showed that the coating was composed of titanium dioxide and calcium hydrogen phosphate dihydrate.

Embodiment 3

[0040] Embodiment 3. use the solution that contains NaOH 20g / l, with titanium as anode, stainless steel as cathode, adopt DC power supply 75-150V, be that the micro-arc oxidation 3min under the condition of 10cm at pole distance; 2 PO 4 ) 2 ·H 2 O) and Ca(NO 3 ) 2 ·H 2 O prepared with calcium 0.1mol / l, phosphorus 0.06mol / l, H 2 o 2 3%wt, the pH value of the solution is 5.5, and the cathode potential of -1.5V vs SCE is deposited at 45°C for 2000 seconds; X-ray diffraction analysis shows that the coating is composed of titanium dioxide, calcium hydrogen phosphate dihydrate, and HAp.

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PUM

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Abstract

Disclosed is a process for making hydroxy apatite / TiO2 biological ceramic coating on titanium based medical metallic material surface, which comprises, using titanium or titanium alloy as anode, stainless steel or titanium as cathode, oxidizing titanium or titanium alloy by using DC source or DC impulse source, then using the obtained titanium or titanium alloy with deposited oxidation film as cathode, using platinum wire or platinum sheets as anode, depositing ceramic film in Hap deposition solution.

Description

Technical field: [0001] The invention relates to a method of electrodepositing hydroxyapatite / TiO on the surface of titanium-based medical metal materials 2 Methods for bioceramic coatings. The prepared metal matrix composites can be effectively used as substitute materials for parts bearing heavy loads such as femur, hip joint and tooth root. Background technique: [0002] Hydroxyapatite (Hydroxyapatite, HAp) is the main mineral component of bone and has good biocompatibility. It is not only safe and non-toxic when implanted in the human body, but also conducts bone growth. It is considered to be a promising artificial hard tissue replacement material. . However, HAp has low mechanical strength and poor toughness, so it cannot be used in places with high stress such as force and support. [0003] Titanium and titanium alloys are currently commonly used implant materials. Their advantages lie in sufficient strength and toughness, but their structure and properties are qui...

Claims

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Application Information

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IPC IPC(8): A61L27/32C25D9/08
Inventor 赵中伟霍广生
Owner CENT SOUTH UNIV
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