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Method for preparing calcium fluoride coating on surface of titanium and alloy thereof and application thereof

A technology of titanium alloy and calcium fluoride, which is applied in the field of nanomaterials to achieve the effect of simple preparation process, high coating bonding strength and high bonding strength

Active Publication Date: 2010-12-15
上海双申医疗器械股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And this field is the problem that this field needs to solve at present for how to just can make nano-calcium fluoride coating on titanium and its alloy surface by using the electrolytic solution of suitable concentration and suitable micro-arc oxidation technical parameter, prior art There are few reports on this part of the content

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  • Method for preparing calcium fluoride coating on surface of titanium and alloy thereof and application thereof
  • Method for preparing calcium fluoride coating on surface of titanium and alloy thereof and application thereof
  • Method for preparing calcium fluoride coating on surface of titanium and alloy thereof and application thereof

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Embodiment 1

[0026] (a) Calcium acetate, hydrofluoric acid, and sodium silicate were prepared with deionized water to form an electrolyte with a concentration of 0.2 mol / L calcium acetate, 0.5 mol / L hydrofluoric acid, and 0.05 mol / L sodium silicate, respectively. (b) With pure titanium plate as the anode and stainless steel as the cathode, a DC pulse power supply is used at a constant current density of 1.0A / cm 2 , Voltage 350-380V, frequency 800Hz, duty cycle 30% under the conditions of treatment for 20min, keep the electrolyte temperature below 60°C (50°C). (c) After the sample was taken out, it was rinsed in deionized water and dried naturally. After testing, the thickness of the coating is 25-35 μm, the grain size is about 50-100 nm, and the element composition is mainly Ti, O, Si, Ca and F. X-ray diffraction analysis shows that the coating phase composition is mainly anatase, gold red Calcium fluoride and calcium fluoride, the content of calcium fluoride in the coating is about 56%. ...

Embodiment 2

[0028] (a) Calcium acetate, hydrofluoric acid, and sodium silicate were prepared with deionized water to form an electrolyte with a concentration of 0.2 mol / L calcium acetate, 0.7 mol / L hydrofluoric acid, and 0.05 mol / L sodium silicate, respectively. (b) with Ti 6 Al 4 V is the anode, stainless steel is the cathode, using a DC pulse power supply at a constant current density of 1.5A / cm 2 , Voltage 420-460V, frequency 800Hz, duty cycle 30% under the conditions of treatment for 10min, keep the electrolyte temperature below 60°C (45°C). (c) After the sample was taken out, it was rinsed in deionized water and dried naturally. After testing, the thickness of the coating is 15-23 μm, the grain size of the coating is about 50-100 nm, and the element composition is mainly Ti, O, Si, Ca and F. X-ray diffraction analysis shows that the coating phase composition is mainly anatase, Rutile and calcium fluoride, the content of calcium fluoride in the coating is about 63%. Moreover, the ...

Embodiment 3

[0030] (a) Deionized water was used to prepare an electrolyte solution containing 0.1 mol / L calcium acetate, 0.4 mol / L hydrofluoric acid and 0.03 mol / L sodium silicate. (b) With pure titanium plate as the anode and stainless steel as the cathode, a DC pulse power supply is used at a constant current density of 1.0A / cm 2 , Voltage 400-450V, frequency 800Hz, duty cycle 30% under the conditions of treatment for 15min, keep the electrolyte temperature below 60°C (50°C). (c) After the sample was taken out, it was rinsed in deionized water and dried naturally. After testing, the thickness of the coating is 15-20 μm, the grain size of the coating is about 20-80 nm, and the element composition is mainly Ti, O, Si, Ca and F. X-ray diffraction analysis shows that the coating phase composition is mainly anatase, Rutile and calcium fluoride, the content of calcium fluoride in the coating is about 21%. Moreover, the nano-calcium fluoride coating prepared in this example can induce the de...

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Abstract

The invention belongs to the technical field of nano materials, and in particular relates to a method for preparing a calcium fluoride coating on the surface of titanium and alloy thereof. In the method, the nano calcium fluoride coating is directly generated in situ on the surface of the titanium or the titanium alloy by one step method in electrolyte containing calcium ions and fluorine ions through micro-arc oxidation. The nano calcium fluoride coating prepared by the method has the nano crystal structure, is closely combined with a matrix, has the phase mainly comprising calcium fluoride and titanium oxide, can induce fluorapatite to deposit on the surface thereof after the calcium fluoride coating is soaked in simulated body fluid for less than 14 days, has good bioactivity and can be applied to the fields such as biomedical materials and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing a calcium fluoride coating on the surface of titanium and titanium alloy substrates. Background technique [0002] Calcium Fluoride (CaF 2 ) is the main chemical component of fluorite, which has many excellent properties, making it a research hotspot in many fields. As a crystal material, calcium fluoride is widely used as a deep ultraviolet laser optical element and a Crystal (Su Liangbi, Xu Jun, Yang Weiqiao, Dong Yongjun, Zhou Guoqing, Growth and Application of Calcium Fluoride Crystal. Acta Silicate Sinica; 2003 Vol. 31 No. 12: 1202-1207; A.Bensalah, M.Mortier, G. Patriarche, P. Gredin, D. Vivien. Synthesis and optical characterizations of undoped and rare-earth-doped CaF 2 nanoparticles. Journal of Solid State Chemistry. 179(2006) 2636-2644). In the field of wear-resistant materials, calcium fluoride is also used as a self-l...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 胡红杰刘宣勇丁传贤
Owner 上海双申医疗器械股份有限公司
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