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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  • Abstract
  • Description
  • Claims
  • Application Information

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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 surface of porous titanium framework or porous titanium alloy framework, and solves the problem of The problem of poor bonding between the tantalum coating and the substrate overcomes the disadvantages of high cost and complicated procedures of the existing preparation methods

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment includes the following steps:

[0042] Step 1. Obtain the three-dimensional geometric model of the porous titanium alloy ankle pad that needs to be prepared by using the method of three-dimensional reconstruction of CT data, such as figure 1 As shown in Fig. 1, model slices and supports are added sequentially to obtain data files in stl format for each slice, and then according to the data files in stl format for each slice, Ti-6Al-4V alloy powder is used as raw material, and the area is selected by electron beam The porous Ti-6Al-4V alloy skeleton is prepared by melting and forming; the pore diameter of the porous Ti-6Al-4V alloy skeleton is 300 μm, and the porosity is 60%;

[0043] Step 2: Carry out chemical corrosion to the porous Ti-6Al-4V alloy skeleton prepared in step 1, and then carry out ultrasonic cleaning and drying successively; It is formed by mixing 68% nitric acid and water according to the volume ratio of 1:3:30, and the chemical corrosi...

Embodiment 2

[0048] This embodiment includes the following steps:

[0049] Step 1. Obtain the three-dimensional geometric model of the porous titanium metal acetabular cup spacer that needs to be prepared by using the method of standardized modeling, and sequentially perform model slice and support addition processing to obtain data files in stl format for each slice, and then according to each The data file in layer-cut stl format, using pure titanium powder as raw material, adopts laser selective melting forming method to prepare porous titanium skeleton; the pore diameter of the porous titanium skeleton is 1000 μm, and the porosity is 90%;

[0050] Step 2, chemically corroding the porous titanium skeleton prepared in step 1, and then performing ultrasonic cleaning and drying in sequence; the corrosion solution used in the chemical corrosion has a mass concentration of 40% hydrofluoric acid, 68% nitric acid and Water is mixed according to the volume ratio of 1:6:60, and the time of chemi...

Embodiment 3

[0054] This embodiment includes the following steps:

[0055] Step 1. Obtain the three-dimensional geometric model of the porous titanium alloy acetabular cup that needs to be prepared by digital three-dimensional scanning method, and sequentially perform model slice and support addition processing to obtain data files in stl format for each slice, and then according to each slice The data file in stl format, using TiTa alloy powder as raw material, adopts electron beam selective melting forming method to prepare porous TiTa alloy skeleton; the pore diameter of the porous TiTa alloy skeleton is 500 μm, and the porosity is 60%;

[0056] Step 2. Carry out chemical corrosion to the porous TiTa alloy skeleton prepared in step 1, and then carry out ultrasonic cleaning and drying successively; Nitric acid and water are mixed according to the volume ratio of 1:5:45, and the time of the chemical corrosion is 30min;

[0057] Step 3. Completely embed the dried porous TiTa alloy skeleto...

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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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