Method for preparing nano bionic structure on titanium alloy surface by micro-arc discharge

A micro-arc discharge and nano-bionic technology, which is applied in the direction of electrolytic inorganic material coating, etc., to achieve the effects of firm bonding, cost reduction, and strong biocompatibility

Inactive Publication Date: 2017-01-04
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a method for preparing nano-bionic structures by micro-arc discharge on the surface of titanium alloys. The titanium alloy parts treated by the present invention have no deformation and no post-treatment is required, and the formed nano-bionic structures are biocompatible Strong resistance; at the same time, it can effectively solve the problem of firm combination and durability between titanium alloy and bone tissue, and reduce the cost

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  • Method for preparing nano bionic structure on titanium alloy surface by micro-arc discharge

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Embodiment 1

[0025] First, take 2 / 3 volume of distilled water in a 1L tank, dissolve 3500g urea and 4000g potassium nitrate in turn, and after all the reagents in the tank are dissolved, pour 1500g sodium chloride into the tank solution under rapid stirring until it is completely mixed. , and finally add water to 1L to obtain an electrolyte; put the pure titanium parts into the prepared electrolyte, use the pure titanium parts as the cathode and graphite as the anode, and put the titanium alloy parts into the electrolyte after the voltage rises to 300V for 10 minutes , the nano-bionic structure can be prepared on the surface of titanium alloy by micro-arc discharge.

Embodiment 2

[0027] First, take 2 / 3 volume of deionized water in a 1L tank, dissolve 3000g of formamide and 5000g of sodium nitrate in sequence, and after all the reagents in the tank are dissolved, pour 1000g of potassium chloride into the tank under rapid stirring. Until it is completely mixed evenly, finally add water to 1L to obtain an electrolyte; put the Ti-6Al-4V piece into the prepared rapid micro-arc nitriding solution, use the Ti-6Al-4V piece as the cathode, graphite as the anode, and the voltage rises to After 450V, put the titanium alloy parts into the electrolyte and treat them for 6 minutes to prepare nano-bionic structures on the surface of the titanium alloy by micro-arc discharge.

Embodiment 3

[0029] First, take 2 / 3 volume of distilled water in a 1.5L tank, dissolve 3500g of urea and 4000g of sodium nitrate in turn, after all the reagents in the tank are dissolved, pour 1000g of sodium chloride into the tank under rapid stirring until completely mixed Evenly, finally add water to 1.5L to obtain electrolyte; put the Ti-15Mo parts into the prepared rapid micro-arc nitriding solution, use the Ti-15Mo parts as the cathode and graphite as the anode, and after the voltage rises to 600V, the titanium alloy parts Putting it in the electrolyte and treating it for 5 minutes, the nano-bionic structure can be prepared on the surface of the titanium alloy by micro-arc discharge.

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Abstract

The invention discloses a method for preparing a nano bionic structure on a titanium alloy surface by micro-arc discharge. The method includes the steps of S1, preparing electrolyte from, by mass, 40-50% of nitrate, 30-35% of nitrogen-containing compound, 10-15% of halide and 10-15% of water by means of mixing; S2, preparing the nano bionic structure through micro-arc discharge, namely putting a titanium alloy part into the prepared electrolyte at the room temperature and treating for 5-10 minutes at a working voltage by taking titanium alloy as a cathode and graphite as an anode. The method for preparing the nano bionic structure on the titanium alloy surface by micro-arc discharge has the advantages that the treated titanium alloy part is free of deformation and needs no aftertreatment, and the formed nano bionic structure is high in biological compatibility, so that firm bonding and durability between medical titanium alloy and bone tissues are achieved effectively and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a method for preparing a nano-bionic structure by micro-arc discharge on the surface of a titanium alloy. Background technique [0002] Surface nanotechnology is beneficial to improve the surface activity of titanium alloy and improve its biocompatibility. The nano-sized titanium alloy surface is easy to form a bionic structure, and its dense surface can inhibit the dissolution of metal ions and improve corrosion resistance, while the reconstructed structure increases the surface hardness, strengthens the protection of the original surface, and improves the wear resistance. The interface between titanium alloy surface and bone is nano-sized, which will delay the occurrence of prosthesis loosening. Chinese patent document CN201410187059.6 discloses a method for preparing a medical titanium alloy with a biomimetic multilayer structure interface, and Chinese p...

Claims

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Application Information

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IPC IPC(8): C23C8/48C25D9/08
CPCC23C8/48C25D9/08
Inventor 蒋永锋包晔峰杨可陈秉岩
Owner HOHAI UNIV CHANGZHOU
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