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Preparation method of composite oxidation bioceramic film on titanium alloy surface

A bioceramic film and surface composite technology, applied in the field of surface treatment of orthopedic metal materials, can solve the problems of thin anodized film layer, unfavorable wound healing, tissue infection, etc., and achieves high controllability, good control and low cost. Effect

Active Publication Date: 2017-10-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the anodic oxidation film is thin, and the hardness is low; and the bonding layer of the micro-arc oxidation film has holes, and when the treated medical titanium alloy is implanted in the tissue, the matrix metal ions will flow from these The hole is released, causing tissue infection, which is not conducive to wound healing

Method used

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  • Preparation method of composite oxidation bioceramic film on titanium alloy surface
  • Preparation method of composite oxidation bioceramic film on titanium alloy surface
  • Preparation method of composite oxidation bioceramic film on titanium alloy surface

Examples

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Embodiment 1

[0033] The method described in this embodiment is used to prepare a stepped bioceramic membrane layer, such as figure 1 As shown, it specifically includes the following steps:

[0034] (1) Pretreatment: Cut the titanium alloy TC4 into a cylindrical titanium material, drill holes above the sample, and polish the surface of the titanium alloy until there are no scratches on the surface of the sample, and then perform degreasing, alkali cleaning and degreasing. Ionic water washing, natural drying;

[0035] (2) Anodic oxidation: Hang the pretreated sample as the anode in the electrolyte, and the stainless steel electrolytic cell as the cathode, carry out anodic oxidation, wash and dry for later use; the power supply parameters are set as: forward voltage 10V, forward voltage The duty cycle is 10%, the frequency is 100Hz, the number of positive and negative pulses is 1, and the oxidation time is 10; the electrolyte formula is: the concentration of phosphoric acid is 15g / L.

[003...

Embodiment 2

[0041] The method described in this embodiment is used to prepare a stepped bioceramic membrane layer, such as figure 1 As shown, it specifically includes the following steps:

[0042] (1) Pretreatment: Cut the titanium alloy TC4 into a cylindrical titanium material, drill holes above the sample, and polish the surface of the titanium alloy until there are no obvious scratches on the surface of the sample, and then perform degreasing, alkali cleaning and Wash with deionized water and dry naturally;`

[0043] (2) Anodic oxidation: Hang the pretreated sample as the anode in the electrolyte, and the stainless steel electrolytic cell as the cathode for anodic oxidation; the power supply parameters are set as: forward voltage 60V, forward duty cycle 30% , the frequency is 500Hz, the number of positive and negative pulses is 3, and the oxidation time is 50min; the electrolyte formula is: the concentration of sulfuric acid is 300g / L.

[0044] (3) Micro-arc oxidation: Replace the el...

Embodiment 3

[0049] The method described in this embodiment is used to prepare a stepped bioceramic membrane layer, such as figure 1 As shown, it specifically includes the following steps:

[0050] (1) Pretreatment: Cut the titanium alloy TC4 into a cylindrical titanium material, drill holes above the sample, and polish the surface of the titanium alloy until there are no obvious scratches on the surface of the sample, and then perform degreasing, alkali cleaning and Wash with deionized water and dry naturally;`

[0051] (2) Anodic oxidation: hang the pretreated sample as the anode in the electrolyte, and the stainless steel electrolytic cell as the cathode for anodic oxidation; the power supply parameters are set as: forward voltage 120V, forward duty cycle 60% , the frequency is 800Hz, the number of positive and negative pulses is 6, and the oxidation time is 100min; the electrolyte formula is: the concentration of phosphoric acid is 50g / L.

[0052] (3) Micro-arc oxidation: Replace the...

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Abstract

The invention discloses a method for preparing a composite oxidation bioceramic film on the surface of a titanium alloy, which belongs to the technical field of surface treatment of orthopedic metal materials. The method of the present invention prepares the internal dense layer by the anodic oxidation method, and then directly prepares the surface porous bioceramic film layer on the basis of the anodic oxidation film layer by the micro-arc oxidation method, and finally adopts the anodic oxidation method on the basis of the micro-arc oxidation film layer Oxidation for a long time under the condition of low voltage or small current makes the bonding layer of the film layer thicker, the holes on the dense layer are less, and the holes in the rough layer are connected to each other. The inner layer of the composite oxidized bioceramic film prepared by the present invention is The bonding layer has a dense structure; the middle layer is a dense layer with a tight structure and many small holes with uniform pore size distribution; the outer layer is a porous loose layer with a rough and porous surface and good hydrophilicity; it compensates for the thin anodic oxidation film layer and hardness Low-level features; secondly, it solves the shortcoming of the single color of the micro-arc oxidation film layer.

Description

technical field [0001] The invention relates to a method for preparing a composite oxidation bioceramic film on the surface of a titanium alloy, belonging to the technical field of surface treatment of orthopedic metal materials. Background technique [0002] After the bone replacement material is implanted in the body, the ideal combination method is that the bone replacement material and bone tissue are combined in the form of bone bonding, so that the functional continuity between the implant and the bone is presented through the continuity of the interface structure, and The interface bonding strength can reach or even exceed the bonding strength of the bone itself and the implant itself. The bone bonding process includes mechanical fit and chemical bonding, and only biologically active materials can form this bone bond. Because the structure and properties of medical metal materials are very different from those of bone tissue, they cannot be chemically bonded with bon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
Inventor 严继康倪尔鑫唐婉霞段志操甘国友易健宏
Owner KUNMING UNIV OF SCI & TECH