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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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  • Abstract
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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 ion dissolution in the body, which is easy to cause inflammation in the human body This leads to implant failure, so its corrosion resistance needs to be further improved; lack of biological activity, poor early bone formation performance

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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preparation example Construction

[0039] A method for preparing a surface-modified coating, comprising the steps of:

[0040] S1. Using titanium powder as a raw material, a titanium coating with a porous structure is prepared on the surface of the substrate by plasma spraying;

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

[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 cobalt-chromium-molybdenum alloy.

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

Embodiment

[0048] A kind of surface modification coating of the present invention, schematic diagram is as figure 1 As shown, the substrate is a titanium sheet. From the inside to the outside of the substrate, there is a porous Ti coating and an outer Ta-O layer. The thickness of the porous Ti coating is 100 μm; the thickness of the Ta-O layer is 3 μm . The Ta-O coating is Ta 2 o 5 As well as unoxidized Ta single substance and incompletely oxidized metastable phase oxide. The porosity of the porous Ti coating is 16.7%.

[0049] A preparation method of the surface modified coating of the present embodiment, comprising the steps of:

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

[0051] Titanium sheets are selected as the base material and processed into small discs of Φ10mm×2mm. After sandblasting the surface of the titanium sheet, ultrasonically clean it once in absolute ethanol solution for 3 minutes, then dry it at 100°C for 1 hour, and cool it for later use; th...

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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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