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Preparation method of porous titanium and titanium alloy

A technology of titanium alloy and porous titanium, which is applied in the field of preparation of porous titanium and titanium alloy, to achieve the effect of meeting the requirements of mechanical properties, simple preparation process and easy realization

Inactive Publication Date: 2019-01-25
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on the preparation of porous titanium and titanium alloys with anisotropic elongated pore structure suitable for bone tissue ingrowth.

Method used

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  • Preparation method of porous titanium and titanium alloy
  • Preparation method of porous titanium and titanium alloy
  • Preparation method of porous titanium and titanium alloy

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preparation example Construction

[0029] Concretely, the preparation method of porous titanium and titanium alloy comprises the following steps:

[0030] A, stearic acid, binding agent and titanium raw material are mixed uniformly to obtain a mixture; the titanium raw material is titanium powder, or a mixed powder of titanium and other metals;

[0031] B, the mixed material obtained in step A is compressed and molded, then dried to obtain a compact;

[0032] C. The compact is vacuum sintered and cooled to obtain porous titanium or porous titanium alloy.

[0033] The titanium raw material in the method of the present invention can adopt pure titanium powder, also can adopt the mixed powder of titanium and other metals; When it is the mixed powder of titanium and other metals, the mass content of other metals is no more than 20%, and other metals can be copper, molybdenum , iron, aluminum, silver, manganese, nickel, cobalt, niobium, zirconium, tantalum, etc. The present invention can adopt planetary ball mill ...

Embodiment 1

[0043] Weigh 50g of titanium powder, add absolute ethanol at 1.2mL / g of titanium powder, add grinding balls at a mass ratio of 10:1, mill on a planetary ball mill at 300 rpm for 2 hours, and dry to obtain titanium powder; 300-600μm spherical stearic acid and 0.08mL of 5% polyvinyl alcohol aqueous solution per gram of titanium powder are fully mixed, and pure titanium powder is added so that the mass ratio of stearic acid to titanium powder is 40%: 60% , and mix evenly; then put the mixture into a mold, press uniaxially at a pressure of 165 MPa, hold the pressure for 3 minutes, and then put it in a constant temperature drying oven at 60 ° C for 10 hours; put the dried compact into a vacuum In the sintering furnace, the vacuum degree is 10 -1 ~10 -3 Under Pa, heat up to 200°C at a rate of 5°C / min, hold for 1 hour, then heat up to 500°C at a rate of 5°C / min, hold for 2 hours, then heat up to 800°C at a rate of 5°C / min, and hold for 30 minutes. Finally, the temperature was raise...

Embodiment 2

[0045] Weigh a total of 50g according to the mass percentage of copper powder and titanium powder as 5%: 95%, add absolute ethanol at 1.2mL / g powder, add grinding balls at a mass ratio of 10:1, and grind on a planetary ball mill at 300 rpm Min ball milling for 2 hours, and after drying, titanium-copper mixed powder was obtained; spherical stearic acid with a size of 300-600 μm was added to 0.08 mL of 5% polyvinyl alcohol aqueous solution per gram of titanium-copper mixed powder, and the titanium-copper mixed powder was added. Mix the powder so that the mass ratio of stearic acid and titanium-copper mixed powder is 40%: 60%, and mix evenly; then put the mixture into a mold, press it under a pressure of 165MPa through uniaxial pressing, keep the pressure for 3min, and then put Put it into a constant temperature drying oven and dry it at 60°C for 10 hours; put the dried compact into a vacuum sintering furnace, and put it in a vacuum degree of 10 -1 ~10 -3 Under Pa, heat up to 20...

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Abstract

The invention discloses a preparation method of porous titanium and titanium alloy, and belongs to the technical field of porous metal materials. The preparation method of the porous titanium and titanium alloy with an anisotropic elongated pore structure suitable for bone tissue to grow in includes the steps that stearic acid, a binder and a titanium raw material are mixed evenly; the obtained mixture is subjected to press forming and then dried, and a pressed blank is obtained; the pressed blank is subjected to vacuum sintering and cooling, and the porous titanium or porous titanium alloy isobtained. By adjusting the mass ratio of the titanium raw material to stearic acid, adjusting the size of stearic acid and optimizing the forming pressure condition, control over the porosity, pore size and pore shape of the porous titanium and titanium alloy is realized, and the porous titanium and titanium alloy with an orderly elongated pore structure are obtained.

Description

technical field [0001] The invention belongs to the technical field of porous metal materials, and in particular relates to a preparation method of porous titanium and titanium alloys. Background technique [0002] Titanium and titanium alloys are widely used as orthopedic and dental implant materials due to their good biocompatibility, high specific strength and good corrosion resistance. However, titanium and its alloys have a higher modulus of elasticity than bone tissue, and the resulting "stress shielding" effect causes bone resorption and loosening of the implant. The introduction of porous structure in titanium and its alloys can reduce its elastic modulus to approximately match that of bone tissue, thus reducing the "stress shielding" effect. In addition, the existing porous structure is also conducive to the growth of bone tissue into the pores of porous titanium and titanium alloys, and may even induce the formation of bone tissue, which is important for the stabl...

Claims

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Application Information

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IPC IPC(8): B22F3/11C22C14/00A61L27/06
CPCA61L27/06B22F3/1121B22F2999/00C22C14/00B22F3/1007B22F2201/20
Inventor 赵朝勇麦萍崔旭梅张雪峰陈敏张磊杨璐
Owner PANZHIHUA UNIV
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