Preparation method of porous tantalum and device applied to same

A technology of porous tantalum and powder, which is applied in the field of medical materials and can solve problems such as residues

Inactive Publication Date: 2012-04-11
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the use of toxic substances such as organic foam and dispersant, this preparation meth

Method used

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  • Preparation method of porous tantalum and device applied to same
  • Preparation method of porous tantalum and device applied to same
  • Preparation method of porous tantalum and device applied to same

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preparation example Construction

[0042] ginseng figure 1 As shown, the invention discloses a method for preparing porous tantalum, comprising the following steps:

[0043] a) laying a layer of tantalum powder on the substrate;

[0044] b) Melting the tantalum powder in step a) according to the preset scanning trajectory by laser cladding method;

[0045] c) Respread a layer of tantalum powder, repeat the laser cladding process of step b);

[0046] The step c) is performed at least once to produce multilayer porous tantalum.

[0047] The method of direct manufacturing of laser cladding to manufacture porous materials has unique advantages, and can quickly and conveniently manufacture the required porous tantalum. Moreover, no toxic organic substances are introduced during the manufacturing process, and the material is of high purity. The required porous material can be manufactured directly by layer-by-layer stacking under the control of computer programming and CNC. Although tantalum has a high melting p...

Embodiment 1

[0068] a) be programmed in a computer according to figure 2 Design the corresponding laser spot scanning track (the edge of the laser spot is just tangent) for the aperture arrangement diagram of the main hole 100;

[0069] b) Pretreat the tantalum powder with a purity greater than 99% and a powder particle size of less than 300 mesh. The pretreatment temperature is 200°C and the time is 2 hours;

[0070] c) Laying a layer of the above-mentioned pretreated tantalum powder on the biological titanium alloy substrate

[0071] d) Melt the tantalum powder in step c) according to the preset scanning trajectory by laser cladding method, wherein the laser power is 60W, the spot diameter is 0.5mm, the energy of each action is 3-5J, pulse The width is 0.6ms, the pulse frequency is 4Hz, and the scanning speed is 3mm / s;

[0072] e) respreading a layer of powder, repeating the laser cladding process of step b);

[0073] The step c) is performed at least several times to produce multila...

Embodiment 2

[0077] a) be programmed in a computer according to Figure 3-a Design the corresponding laser spot scanning trajectory for the aperture layout of the central main hole 20, and preset the wall thickness between adjacent main holes 20 to be 0.12mm;

[0078] b) Pretreat the tantalum powder with a purity greater than 99% and a powder particle size of less than 300 mesh. The pretreatment temperature is 200°C and the time is 2 hours;

[0079] c) Laying a layer of the above-mentioned pretreated tantalum powder on the biological titanium alloy substrate

[0080] d) Melt the tantalum powder in step c) according to the preset scanning trajectory by laser cladding method, wherein the laser power is 130W, the spot diameter is 0.8mm, the energy of each action is 5-10J, and the pulse The width is 1.0ms, the pulse frequency is 8Hz, and the scanning speed is 5mm / s;

[0081] e) respreading a layer of powder, repeating the laser cladding process of step b);

[0082] The step c) is performed ...

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Abstract

The invention discloses a preparation method of porous tantalum. The preparation method comprises the following steps of: a), laying a layer of tantalum powder on a substrate; b), melting the tantalum powder in the step a) through a laser cladding method according to a preset scanning track; and c), laying a layer of powder again, repeating the laser cladding process in the step b), wherein the step c) is performed at least once, so as to prepare multiple layers of porous tantalum. The invention also discloses a device applied to the preparation method of porous tantalum. According to the invention, the laser cladding method is applied to the preparation of porous tantalum; and porous tantalum prepared by the preparation method and the device can be directly formed in no need of subsequent processing, and at the same time, any toxic substances are not introduced in the preparation process, and any substances can not be remained.

Description

technical field [0001] The invention relates to the technical field of medical materials, in particular to a method and device for preparing porous tantalum. Background technique [0002] Femoral head necrosis is a common clinical disease in orthopedics. It is a disease in which the blood supply to the femoral head is interrupted or damaged, which in turn leads to changes in the structure of the femoral head, collapse of the femoral head, and joint dysfunction. In the United States, it is estimated that 10,000 to 30,000 cases of osteonecrosis of the femoral head occur each year, of which 5% to 10% require artificial joint replacement, and young patients will also face the problem of artificial joint revision, so how to delay or prevent the development of the disease is a matter of delay The key to joint replacement. [0003] Tantalum metal is an ideal material for making surgical implants. It has been used in the medical field for more than half a century, including cardiac...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C27/02B22F3/105B22F3/11
CPCY02P10/25
Inventor 陈长军张敏
Owner SUZHOU UNIV
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