A kind of surface treatment method of tinb alloy

Abstract

The invention discloses a TiNb alloy surface treatment method. The TiNb alloy surface treatment method comprises the steps that 1, a TiNb alloy sheet is polished to be bright to be then subjected to ultrasonic oil removal, and natural drying is carried out after rinsing; 2, silver nitrate and calcium nitrate are dissolved in a hydrogen peroxide solution to obtain a mixed solution; 3, the mixed solution is added into a hydro-thermal synthesis reaction still, and the air-dried TiNb alloy sheet is placed in the hydro-thermal synthesis reaction still to be then placed into an oven for a hydrothermal reaction; and 4, rinsing and air drying are carried out after the TiNb alloy sheet is taken out, and the TiNb alloy sheet with the surface coated with a TiO2 film is obtained. The method can be realized at a relatively low temperature, and the problem of deterioration of the mechanical properties of a titanium alloy matrix due to a conventional heat treatment method is solved. A TiO2 film material prepared by the method has the good biological activity and can rapidly induce hydroxyapatite to deposit on the surface in simulated body fluid. In addition, elementary substance Ag is uniformly distributed in the TiO2 film, and the excellent antibacterial ability is given to the film material.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and biological materials, and in particular relates to a surface treatment method of TiNb alloy. Background technique [0002] TiNb alloy is a new type of β-titanium alloy. Compared with pure titanium, it has an elastic modulus that better matches that of human bones. After implanting in the human body, it can significantly weaken the stress shielding effect between the implant and the surrounding tissue. . At the same time, the alloy does not contain any elements with toxic and side effects on the human body, so it shows a good application prospect in the field of clinical interventional therapy. Although TiNb alloy has excellent comprehensive mechanical properties, it is still a biologically inert material like other titanium alloys. That is to say, the spontaneously formed oxide film on the surface of TiNb alloy is an inert and dense passivation layer, and its ability to induce ph...

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Problems solved by technology

Focusing on the improvement of the biological activity and antibacterial ability of titanium and alloys, scientific researchers have carried out more research work and achieved fruitful results, but the existing problems are: (1) People are not interested in TiO 2 The antibacterial performance and biological activity usually only focus on one aspect; (2) a few reported Ag-TiO containing both biological activity and antibacterial activity 2 Thin films usually adopt the "two-step" strategy of thin film preparation-silver loading, and the preparation process is relatively complicated (Rare Metal Materials and Engineering, 2017, 46(4):1020-1025); (3) on titanium and its alloy substrates Preparation of TiO 2 Most of the methods reported for the thin film and subsequent deposition of Ag, such as sol-gel method, micro-arc oxidation, electrochemical anodization, impregnation-thermal decomposition of silver nitrate, etc., require a high-temperature calcination step, which will inevitably deteriorate the titanium and its alloy substrates. The mechanical properties of (Materials Heralds, 2016,30(8):1-4,14)

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