Preparation method of medical porous titanium or titanium alloy materials coated with tantalum coating on surfaces

A surface coating, titanium alloy technology, applied in coatings, pharmaceutical formulations, metal processing equipment and other directions, can solve the problems of poor bonding force between tantalum coating and substrate, high cost of preparation method, complicated process, etc., to solve the problem of tantalum coating Poor bonding force between layer and substrate, improving metallurgical bonding force and overcoming the effect of high cost

Active Publication Date: 2019-01-25
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, tantalum is coated on the surface of porous titanium framework or porous titanium alloy framework through powder embedding and low-temperature diffusion sintering to form a metallurgical bond, which greatly improves the bonding force between tantalum and the s

Method used

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  • Preparation method of medical porous titanium or titanium alloy materials coated with tantalum coating on surfaces
  • Preparation method of medical porous titanium or titanium alloy materials coated with tantalum coating on surfaces
  • Preparation method of medical porous titanium or titanium alloy materials coated with tantalum coating on surfaces

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] This embodiment includes the following steps:

[0042] Step 1. Use the three-dimensional reconstruction method of CT data to obtain the three-dimensional geometric model of the porous titanium alloy ankle pad that needs to be prepared, such as figure 1 As shown, the model slice and support adding process are performed in sequence to obtain the data file of each slice stl format, and then according to the data file of each slice stl format, the Ti-6Al-4V alloy powder is used as the raw material, and the electron beam is selected A porous Ti-6Al-4V alloy skeleton is prepared by a melt forming method; the porous Ti-6Al-4V alloy skeleton has a pore size of 300 μm and a porosity of 60%;

[0043] Step 2. The porous Ti-6Al-4V alloy skeleton prepared in step one is chemically corroded, and then ultrasonic cleaning and drying are carried out in sequence; the etching liquid used in the chemical corrosion is composed of hydrofluoric acid with a mass concentration of 40...

Example Embodiment

[0047] Example 2

[0048] This embodiment includes the following steps:

[0049] Step 1. Use standardized modeling methods to obtain the three-dimensional geometric model of the porous titanium acetabular cup cushion that needs to be prepared, and sequentially perform the model slice and support adding processing to obtain the data file of each slice stl format, and then according to each slice Sliced ​​layer stl format data file, using pure titanium powder as raw material, using laser selective melting forming method to prepare porous titanium framework; the porous titanium framework has a pore size of 1000 μm and a porosity of 90%;

[0050] Step two: chemically etch the porous titanium framework prepared in step one, followed by ultrasonic cleaning and drying; the chemical etching uses hydrofluoric acid with a mass concentration of 40%, nitric acid with a mass concentration of 68%, and Water is mixed in a volume ratio of 1:6:60, and the chemical corrosion time is 60 minutes;

[005...

Example Embodiment

[0053] Example 3

[0054] This embodiment includes the following steps:

[0055] Step 1. Use digital three-dimensional scanning to obtain the three-dimensional geometric model of the porous titanium alloy acetabular cup that needs to be prepared, and perform the model slice and support adding processing in sequence to obtain the data file of each slice stl format, and then according to each slice A data file in stl format, using TiTa alloy powder as a raw material to prepare a porous TiTa alloy skeleton by an electron beam selective melting forming method; the porous TiTa alloy skeleton has a pore size of 500 μm and a porosity of 60%;

[0056] Step 2. The porous TiTa alloy skeleton prepared in step 1 is chemically corroded, and then ultrasonic cleaning and drying are carried out in sequence; the etching liquid used in the chemical corrosion is composed of hydrofluoric acid with a mass concentration of 40% and a mass concentration of 68%. Nitric acid and water are mixed in a volume r...

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Abstract

The invention discloses a preparation method of medical porous titanium or titanium alloy materials coated with tantalum coatings on surfaces, which includes the following steps: firstly, preparing aporous titanium frame or a porous titanium alloy frame by adopting the 3D printing method; next etching the porous titanium frame or the porous titanium alloy frame, and cleaning and drying; then totally embedding the porous titanium frame or the porous titanium alloy frame in ultrafine tantalum powder in metal canning, vacuum sealing and diffusion sintering in low temperature; lastly taking out the frame, removing the powder and obtaining the medical porous titanium or titanium alloy materials coated with the tantalum coatings on surfaces. The preparation method of the medical porous titaniumor titanium alloy materials coated with the tantalum coatings on surfaces has the advantages that through embedding in powder and diffusion sintering in low temperature, tantalum coats the surfaces of the porous titanium frame or the porous titanium alloy frame, and metallurgical bonding is formed, thereby greatly enhancing the bonding force between tantalum and the surface of the porous titaniumframe or the porous titanium alloy frame, solving the difficulty of poor bonding force between the tantalum coatings and matrix, and overcoming the disadvantages of high cost and complicated processof the prior preparation method.

Description

technical field [0001] The invention belongs to the technical field of preparation of medical implant materials, and in particular relates to a preparation method of medical porous titanium or titanium alloy material coated with a tantalum coating on the surface. Background technique [0002] The history of clinical application of biomedical metal materials as orthopedic implants can be traced back to the fifteenth century, but the real scale application began in the 1880s. From the earliest stainless steel and CoCr alloy to the most widely used titanium alloy, biomedical metal materials have already become an indispensable key material in clinical practice. However, compared with the modulus of human bone of 10GPa~30GPa, the excessively high elastic modulus (100GPa~200GPa) of existing medical metal materials leads to a serious stress shielding effect, which leads to bone resorption around the implant, and eventually causes implant damage. Loosening or breaking leads to imp...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F3/10B22F3/105B22F3/11B22F5/10C22C14/00C23C10/36B33Y10/00B33Y50/00B33Y80/00A61L27/06A61L27/30A61L27/50A61L27/56
CPCA61L27/06A61L27/306A61L27/50A61L27/56C22C14/00C23C10/36B22F3/1007B22F3/1146B22F5/10B33Y10/00B33Y50/00B33Y80/00A61L2420/08A61L2400/18A61L2420/02B22F2003/241B22F10/00B22F1/17B22F10/62B22F10/38B22F10/28B22F10/64B22F10/68Y02P10/25
Inventor 杨坤汤慧萍王建杨广宇刘楠贾亮支浩
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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