Method for preparing colorful titanium dioxide film on surface of porous NiTi alloy at low temperature

A titanium dioxide and alloy technology is applied in the field of preparing colored titanium dioxide thin films, and achieves the effects of simple preparation method, not easy to peel off, and inhibition of Ni ion dissolution

Inactive Publication Date: 2011-08-31
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a colored titanium dioxide film on the surface of a porous NiTi alloy at low temperature,

Method used

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specific Embodiment approach 1

[0015] Specific embodiment one: the method for preparing the colored titanium dioxide thin film on the surface of the porous NiTi alloy in this embodiment at low temperature is carried out in the following steps: (1) pretreatment of the surface of the porous NiTi alloy; (2) putting the pretreated porous NiTi alloy into a work container (3) washing and drying to obtain a porous nickel-titanium alloy with a colored titanium dioxide film.

[0016] In this embodiment, a uniform titanium dioxide film is formed on the surface of the porous NiTi and inside the pores, and the color of the film can be golden yellow, blue, green, purple, etc. The colored titanium dioxide film is non-toxic, not easy to peel off and fall off, can effectively inhibit the dissolution of Ni ions, and improve the corrosion resistance, wear resistance and biocompatibility of the porous NiTi alloy.

[0017] The preparation method of this embodiment is simple, low in cost, not affected by the shape of the porous...

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is: Step (1) The surface pretreatment of the porous NiTi alloy is degreasing, SiC sandpaper grinding, mechanical polishing and electrochemical polishing in sequence. Other steps and selected parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the container part of the high-pressure hydrothermal kettle in step (2) is made of stainless steel. Other steps and selected parameters are the same as those in Embodiment 1.

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Abstract

The invention discloses a method for preparing a colorful titanium dioxide film on a surface of porous NiTi alloy at low temperature, comprising the following steps: 1. carrying out preprocessing, deoiling, SiC sand paper grinding, mechnical polishing and electrochemical polishing on the surface of the porous NiTi alloy; 2. carrying out hydrothermal treatment on the preprocessed porous NiTi alloy in a high-pressure hydrothermal kettle containing deionized water, wherein the deionized water is 30-70% by volume of the high-pressure hydrothermal kettle, the hydrothermal treatment temperature is 200-300 DEG C, and the processing time lasts for 8-12 hours; and 3. washing, naturally drying or drying at the temperature of 50-80 DEG C, thus obtaining the porous NiTi alloy provided with the colorful titanium dioxide film. the preparation method is simple, ensures low cost, is not influenced by the shape of the porous NiTi alloy, ensures no environment pollution, and can be used for repair and replacement on hard tissues such as bones, joints, artificial fangs and the like, and the bright color of the film can play roles in identification and attractiveness.

Description

technical field [0001] The invention relates to a method for preparing a colored titanium dioxide film, in particular to a method for preparing a colored titanium dioxide film at a low temperature on the surface of a porous NiTi alloy. Background technique [0002] In recent decades, the research and development of biomedical materials have made remarkable achievements, making millions of patients recover and greatly improving people's quality of life. With the development of science and technology, the aging population and the increase of trauma caused by various accidents, people's demand for biomedical materials and their products is increasing. At present, medical metal materials are most commonly used in human body load-bearing hard tissue implants, such as medical stainless steel, cobalt-chromium alloy, titanium and titanium alloy, and NiTi shape memory alloy, but these materials cannot satisfactorily solve the problem of immunity and biomechanical compatibility. For ...

Claims

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Application Information

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IPC IPC(8): C23C8/40
Inventor 徐吉林罗军明邓莉萍
Owner NANCHANG HANGKONG UNIVERSITY
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