Method for preparing porous titanium coating on surface of titanium alloy

A technology of porous titanium and titanium alloy, which is applied in the coating process and coating of metal materials, can solve the problems of high bonding force, singleness, and not suitable for porous titanium coating on the surface of implants, and achieve enhanced interface bonding strength and temperature The effect of low and small molecular weight

Inactive Publication Date: 2013-08-28
李建久
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to thermodynamic studies, the binding force between titanium and oxygen, carbon, and nitrogen is much higher than that of hydrogen, so hydride ions cannot avoid the inclusion of impurities in titanium sintering
Moreover, the purpose of this patent is to prepare a single porous titanium, which does not involve the problem of interfacial bonding, so it is not suitable for the preparation of porous titanium coatings on the surface of implants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The matrix powder is pure titanium powder, the oxygen content is 0.18wt%, and the average particle size is 60 μm; according to the properties of the matrix powder, TiH with an average particle size of 40 μm is selected. 2 Powder with an oxygen content of 0.3 wt%. Add forming aids, its composition is: naphthalene 90%, stearic acid 1%, polyethylene wax 9%. Add the forming aid to the powder, knead at 80°C for 30 minutes, the volume content of the powder is 40%, and a coating material with good fluidity and viscosity is obtained. Fix the matrix in the middle of the mold, fill the coating material into the mold, raise the temperature to 80°C, and warm press to form, the pressing pressure is 3MPa. After demolding, a shaped blank with the desired shape is obtained. Place the formed billet in a vacuum furnace, under 5Pa vacuum, raise the temperature to 90°C at a rate of 1°C / min, keep it warm for 6 hours, then raise the temperature to 200°C at 2°C / min and keep it warm for 1 ho...

Embodiment 2

[0027] The matrix powder is pure titanium powder, the oxygen content is 0.18wt%, and the average particle size is 60 μm; according to the properties of the matrix powder, TiH with an average particle size of 50 μm is selected. 2 Powder with an oxygen content of 0.32 wt%. Add forming aids, its composition is: naphthalene 90%, stearic acid 1%, polyethylene wax 9%. Add the forming aid to the powder, knead at 80°C for 1 hour, the volume content of the powder is 50%, and a coating material with good fluidity and viscosity is obtained. Fix the matrix in the middle of the mold, fill the coating material into the mold, raise the temperature to 90°C, and warm press to form with a pressing pressure of 10MPa. After demolding, a shaped blank with the desired shape is obtained. Place the molded billet in a vacuum furnace, raise the temperature to 85°C at a rate of 2°C / min under a vacuum of 0.1Pa, keep it warm for 11 hours, then raise the temperature to 200°C at 1°C and keep it warm for 0...

Embodiment 3

[0029] The matrix powder is hydrogenated dehydrogenation titanium powder, the oxygen content is 0.35wt%, and the average particle size is 45 μm. According to the properties of the matrix powder, TiH with an average particle size of 45 μm is selected. 2 Powder with an oxygen content of 0.3 wt%. Add forming aids, its composition is: naphthalene 95%, stearic acid 3%, polyethylene wax 2%. Add the forming aid to the powder, knead at 90°C for 90 minutes, the volume content of the powder is 60%, and a coating material with good fluidity and viscosity is obtained. The matrix is ​​fixed in the middle of the mold, and injection molded at 85°C, the injection pressure is 20MPa, the injection speed is 20g / s, and the mold temperature is 30°C to obtain a rough product. After demolding, a shaped blank with the desired shape is obtained. Place the formed billet in a vacuum furnace, under 10Pa vacuum, raise the temperature to 80°C at a rate of 3°C / min, keep it warm for 12 hours, then raise th...

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Abstract

The invention provides a method for preparing a porous titanium coating on the surface of titanium alloy. The method comprises the following steps of: adding a forming additive to TiH2 powder selected as a raw material, mixing to obtain a coating material, then obtaining a product green body through a warm-pressing or injection forming method, and finally carrying degreasing, dehydrogenation and sintering integrated treatment to obtain the product. The method can be used for realizing the preparation of the porous titanium coating with high interface bonding strength, and the interface bonding strength of the porous titanium coating exceeds 400MPa; and the impurity content in the coating is substantially reduced through an integrated treatment technology in the heating process, and the oxygen content in the coating is less than 0.35wt%. The method can be used for coating the surface of titanium alloy with the coating with the controlled porosity, size and thickness, and is particularly suitable for preparing the porous titanium coating. The method is simple and practical in a preparation technology; and the prepared product has excellent performance and is suitable for industrial production.

Description

technical field [0001] The invention discloses a method for preparing a porous titanium coating on the surface of a titanium alloy; it belongs to the technical field of metal composite material preparation. Background technique [0002] With the development of medical technology, the clinical market demand for medical implants is also increasing. Titanium and titanium alloys have excellent biocompatibility, high specific strength and excellent fatigue resistance, and are widely used as a type of implant material at present. Therefore, titanium and titanium alloy implants have been used more and more in the fields of maxillofacial surgery, dental implants, and artificial bone joints. However, such implants are biologically inert and do not match the elastic modulus of the surrounding bone. It is easy to produce problems such as unstable combination of implant and bone, low bonding strength, etc., leading to implant failure. [0003] The preparation of porous titanium coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00
Inventor 李建久
Owner 李建久
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