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A kind of surface porous titanium-based functionally graded material and its preparation method
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A technology of functionally graded materials and porous surfaces, applied in medical science, prostheses, etc., can solve the problems of improved mechanical properties, complicated preparation methods, and high cost, and achieve uniform pore distribution, good mechanical properties, and improved mechanical properties.
Active Publication Date: 2021-10-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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[0004] Aiming at the deficiencies and defects of the above-mentioned prior art, the purpose of the present invention is to provide a surface porous titanium-based functionally graded material and its preparation method, which solves the problems of relatively complicated preparation methods, slightly high cost and difficulty in improving mechanical properties in the prior art. subject to certain technical limitations
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Embodiment 1
[0032] A method of preparing a surface porous titanium-based function gradient material comprising the steps of:
[0033] Step 1: Using a commercially available TC4 titanium alloy plate, the sheet material is 100 mm × 100 mm × 4 mm, annealing TC4 titanium alloy plate, annealing temperature 500 ° C, holding time 8 h;
[0034] Step 2: Place different depth holes on the TC4 titanium alloy plate after the annealing treatment, as well as the mixing needle preset hole; deeper pore depth H 1 2mm, shallow hole depth H 2 1mm, aperture 3mm, stirred needle preset hole depth of 2 mm, stirred needle preset hole hole diameter It is 5mm, and the hole spacing is 10mm in the same row.
[0035] Step 3: Fill in the powder, the powder added to the shallow hole is a pure magnesium powder, and the powder added to the deeper hole is hydroxyapatite;
[0036] The size of the hydroxyapatite particles was 80 μm, the magnesium powder particle size was 200 μm, and the obtained gradient material concentratio...
Embodiment 2
[0048] A method of preparing a surface porous titanium-based function gradient material comprising the steps of:
[0049] Step 1: Using a commercially available TC4 titanium alloy plate, the sheet material is 100 mm × 100 mm × 4 mm, annealing TC4 titanium alloy plate, annealing temperature 500 ° C, holding time 8 h;
[0050] Step 2: Place different depth holes on the TC4 titanium alloy plate after the annealing treatment, as well as the mixing needle preset hole; deeper pore depth H 1 2mm, shallow hole depth H 2 1mm, aperture 3mm, stirred needle preset hole depth of 2 mm, stirred needle preset hole hole diameter It is 5mm, and the hole spacing is 10mm in the same row.
[0051] Step 3: Fill in the pore, the powder added to the shallow hole is pure magnesium powder, and the powder added in a deeper hole is triphostium phosphate;
[0052] The added phosphate particles have a size of 150 μm, and the magnesium powder particle size is 200 μm, and the obtained gradient material concent...
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Abstract
The invention discloses a method for preparing a surface porous titanium-based functionally graded material. The method firstly punches holes in a titaniumalloy plate, fills the holes with powder, then processes them by stirring and friction, and finally undergoes picklingprocessing to obtain Superficially porous Ti-based functionally graded materials. The method of the present invention overcomes the problems of powdermetallurgy and other methods, the production process is relatively complicated, the cost is slightly high, and the improvement of mechanical properties is also limited to a certain extent, and the surface porous titanium with uniform pore distribution, good mechanical properties and high bonding strength is prepared. based functionally graded materials. The method of the present invention utilizes the friction stir processing technology to refine the alloycrystal grains and make the second phase structure uniform, and utilizes the friction stir processing technology to combine the advantages of titaniumalloy and hydroxyapatite / tricalcium phosphate, thereby improving the Mechanical properties and biofunctionality of titanium alloys as bone implant materials.
Description
Technical field [0001] The present invention belongs to the technical field of biomedical materials, and more particularly to a surface porous titanium-based functional gradient material and a preparation method thereof. Background technique [0002] Titanium and titanium and titanium alloys are widely used in biological implant materials. Since most medical titanium alloys are biological inert materials, the elastic modulus of the surrounding bone material does not match, the interface of the implant and the host bone is poor and the bone binding ability is to be improved, and the single titanium and titanium alloy products cannot be well. Meet the clinical needs. Therefore, in order to obtain a more excellent performance, more excellent performance, more excellent properties, generally modified the surface of the titanium and titanium alloy materials by maintaining its substrate, and modify the surface of titanium and titanium alloy materials such that the titanium alloy is mor...
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