Surface-modified coating and preparation method and application thereof

A surface modification and coating technology, applied in the field of surface modification coating and its preparation, can solve the problems of lack of biological activity, poor wear resistance, poor osteogenesis performance, etc., and achieve small ion dissolution and good wear resistance , Good effect on early osteogenic performance

Active Publication Date: 2019-03-19
48TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0003] Existing medical materials such as titanium, stainless steel, or cobalt-chromium-molybdenum alloy, when used as bone implant materials, still have the following defects: poor wear resistance; there is still a certain amount of io

Method used

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  • Surface-modified coating and preparation method and application thereof
  • Surface-modified coating and preparation method and application thereof

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[0039] A method for preparing a surface modified coating includes the following steps:

[0040] S1. Using titanium powder as raw material, plasma spraying is used to prepare a porous titanium coating on the surface of the substrate;

[0041] S2. Using Ta as a target and oxygen as a reactive gas, a Ta-O coating is prepared on the surface of the porous titanium coating by ion beam sputtering coating.

[0042] In the step S1, the diameter of the titanium powder is 100-200 μm; the thickness of the obtained titanium coating is 100-500 μm; the substrate is a medical metal material; the metal material is titanium, stainless steel, or a cobalt-chromium-molybdenum alloy.

[0043] In the step S1, the process conditions of the plasma spraying are: the flow rate of the working gas Ar is 35-55 slpm, H 2 The flow rate is 7-20slpm, the spraying power is 35-60kW, the spraying distance is 250-300mm, the spraying power is 30-60kW, and the powder feeding rate is 30-50g / min.

[0044] In the step S2, the pr...

Example Embodiment

[0047] Example

[0048] A surface modified coating of the present invention, a schematic diagram such as figure 1 As shown, the substrate is a titanium sheet, and the porous Ti coating and the outer Ta-O layer are sequentially from the substrate from the inside to the outside. The porous Ti coating has a thickness of 100 μm; and the Ta-O layer has a thickness of 3 μm. . The Ta-O coating is Ta 2 O 5 As well as Ta element without oxidation and metastable phase oxide with incomplete oxidation. The porosity of the porous Ti coating is 16.7%.

[0049] A method for preparing the surface modified coating of this embodiment includes the following steps:

[0050] S1. Raw material selection and substrate pretreatment:

[0051] Choose titanium sheet as the base material and process it into small discs of Φ10mm×2mm. After sandblasting the surface of the titanium sheet, it is ultrasonically cleaned once in anhydrous ethanol solution for 3 minutes, then dried at 100°C for 1 hour and cooled for l...

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Abstract

The invention discloses a surface-modified coating and a preparation method and application thereof. The surface-modified coating comprises from inside to outside an inner-layer porous titanium coating and an outer-layer Ta-O layer. The preparation method for the surface-modified coating comprises the steps that titanium powder is adopted as a raw material, and plasma spraying is adopted so that aporous-structured titanium coating is prepared on the surface of a base material; and tantalum is adopted as a target material, through oxygen, an ion beam sputtering coating method is adopted, and aTa-O coating is prepared on the surface of the porous titanium coating. The surface-modified coating can be used for preparing a repair and substituent material of hard tissues. The surface-modifiedcoating has both good wear resistance and anti-corrosion property and low elastic modulus; and in addition, the surface-modified coating is bonded closely with the base material and small in stress.

Description

technical field [0001] The invention relates to the technical field of medical material coatings, in particular to a surface modification coating and a preparation method and application thereof. Background technique [0002] Medical metal materials, such as titanium, stainless steel, or cobalt-chromium-molybdenum alloys, because of their excellent mechanical properties and good biocompatibility, titanium implants are widely used in the repair of hard tissues such as bones, joints, and teeth with replace. Although these metal materials can spontaneously oxidize in the air to form a corresponding protective layer and thus have good corrosion resistance, in the complex physiological erosion environment of the human body, the oxide layer with a thickness of only a few nanometers is easily peeled off by force, while the human body The low oxygen environment limits the reformation of the damaged oxide layer. The above-mentioned problems are particularly serious in the case of b...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/08C23C14/34C23C14/16C23C28/02
CPCC23C4/08C23C14/16C23C14/34C23C28/021C23C4/134
Inventor 丁玎何峰周国方张浩
Owner 48TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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