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Titanium-based functional material with aperture gradient structure, preparation method and application

A titanium-based functional material with a pore gradient structure, its preparation method and its application technology, which can be applied in the directions of additive manufacturing, manufacturing tools, additive processing, etc., can solve the problems of poor plasticity and high elastic modulus, and meet the needs of growth , expanding contact area, good academic value and clinical application value

Active Publication Date: 2021-11-23
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies and defects of the above-mentioned prior art, the object of the present invention is to provide a titanium-based functional material with a pore size gradient structure, a preparation method and its application, so as to solve the problem of the high elastic modulus of the titanium-based functional material prepared by the prior art. and poor plasticity

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  • Titanium-based functional material with aperture gradient structure, preparation method and application
  • Titanium-based functional material with aperture gradient structure, preparation method and application

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preparation example Construction

[0030] The present invention proposes a titanium-based functional material with a pore size gradient structure and a preparation method thereof, including: the method first uses laser selective melting technology to prepare a pure titanium or titanium alloy substrate plate, and then punches or grooves on the plate, The holes or slots are filled with pure aluminum powder, then processed by friction stir method, and finally pickled to remove clusters of aluminum particles, form a porous structure, and obtain a porous titanium-based functional material with a pore size gradient structure.

[0031] combine figure 2 , the surface layer of the titanium-based functional material with a pore size gradient structure prepared by the present invention is a fine porous layer with a crossed pore structure, and the inner layer is a loose porous layer. The surface layer and the matrix have different pore structures, which are beneficial to the growth and fusion of bone tissue, and have good...

Embodiment 1

[0048] A method for preparing a titanium-based functional material with a pore size gradient structure, comprising the following steps:

[0049] Step 1: Put pure titanium powder with a particle size distribution range of 5 to 50 μm in the powder box of laser selective melting equipment, the gas used is argon, the laser power is 400W, the powder coating thickness is 0.04mm, and the laser scanning distance is 0.09mm , the laser scanning rate is 1700mm / s, and the thickness of the prepared pure titanium substrate is 5mm.

[0050] Step 2: Drill holes on the surface of the pure titanium substrate, the hole depth is 1.5mm, the hole diameter is 2mm, and the hole spacing is 2mm.

[0051] Step 3: Fill the hole with pure aluminum powder, and perform friction stir processing on the substrate after adding the powder. The rotation speed of the stirring head is 1180r / min, the forward speed is 23.5mm / min, and the shoulder reduction is 0.5 mm, the length of the stirring needle is 1.5mm.

[0...

Embodiment 2

[0057] A method for preparing a titanium-based functional material with a pore size gradient structure, comprising the following steps:

[0058] Step 1: Place TC4 powder with a particle size distribution range of 20-60 μm in the powder box of laser selective melting equipment, the gas used is argon, the laser power is 400W, the powder coating thickness is 0.04mm, and the laser scanning distance is 0.09mm. The laser scanning rate is 1700mm / s, and the thickness of the prepared TC4 substrate is 5mm.

[0059] Step 2: Drill holes on the surface of the TC4 substrate, the hole depth is 1.5mm, the hole diameter is 1.5mm, and the hole spacing is 1.5mm.

[0060] Step 3: Fill the hole with pure aluminum powder, and perform friction stir processing on the substrate after adding the powder. The rotation speed of the stirring head is 1180r / min, the forward speed is 23.5mm / min, and the shoulder reduction is 0.5 mm, the length of the stirring needle is 1.5mm.

[0061] Step 4: Pickling it, t...

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Abstract

The invention discloses a titanium-based functional material with an aperture gradient structure and a preparation method and application. The method comprises the steps that firstly, a pure titanium or titanium alloy matrix plate is prepared through a selective laser melting technology, then holes are drilled in the plate and filled with pure aluminum powder, then a friction stir method is adopted for machining, the aluminum powder and a friction stir machining area are fully mixed, finally, acid washing or alkali washing treatment is conducted on the aluminum powder to remove aluminum particle clusters and form a porous structure, and accordingly, the titanium-based functional graded material of which the surface and a matrix have aperture gradient is obtained. By means of the friction stir machining technology, alloy grains can be refined, the porosity of the material is reduced, and the comprehensive performance of the material is improved. The material is of a rough porous structure, the aperture of the surface layer is inconsistent with the aperture of the matrix, the growth requirements of different cells can be met, bone tissue can grow towards an implant easily, and the material has very good clinical application value. The preparation process is simple, low in cost and beneficial to market promotion.

Description

technical field [0001] The invention belongs to the technical field of preparation of biomedical materials, and in particular relates to a titanium-based functional material with a pore size gradient structure, a preparation method and an application. Background technique [0002] Titanium and its alloys have become very attractive biomedical metal materials because of their excellent corrosion resistance, mechanical properties and processing properties, and are cheaper than precious metal medical products, and have good biocompatibility compared with ordinary metal materials. . However, most medical titanium alloys are biologically inert materials, which are not easy to induce the growth of surrounding tissue cells, and the elastic modulus is much higher than that of human bones (10-30GPa), which will cause the mismatch between the implant material and the surrounding bones, resulting in a stress shielding effect, causing The implant loosens or breaks, rendering the graft ...

Claims

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Application Information

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IPC IPC(8): B22F5/10B22F10/28B22F10/60B22F10/62B22F10/66B23K20/12B23P15/00B33Y10/00B33Y40/20B33Y80/00C23G1/10A61L27/06A61L27/50A61L27/56
CPCB22F5/10B22F10/28B22F10/66B22F10/60B22F10/62C23G1/106B33Y10/00B33Y40/20B33Y80/00A61L27/06A61L27/50A61L27/56B23K20/122B23P15/00A61L2430/02B23K2103/14Y02P10/25
Inventor 王快社张婷王文乔柯刘强关肖虎杨娟何攀
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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