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Broad band laser preparation for ceramic coating material containing cerium dioxide, method and product application

A coating and broadband technology, applied in the material field of gradient bioactive ceramic coating, can solve the problems of affecting the uniformity and stability of the coating, large temperature gradient of the molten pool, multiple cracks, etc.

Inactive Publication Date: 2009-09-30
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of laser cladding bioceramic coatings are: (1) The narrow-band laser spot used is very small (φ1~3mm), and the overlapping parts and remelting area are too large, which will cause re-decomposition and amorphization of bioceramics , affecting the uniformity and stability of the coating
(2) The laser energy has a Gaussian distribution, which is easy to cause a large temperature gradient in the central area of ​​the molten pool, and more cracks will be generated in the coating after the molten pool solidifies and crystallizes
(3) There is a lack of research on the influence of rare earth oxide content on the microstructure and properties of bioceramic coatings

Method used

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  • Broad band laser preparation for ceramic coating material containing cerium dioxide, method and product application
  • Broad band laser preparation for ceramic coating material containing cerium dioxide, method and product application
  • Broad band laser preparation for ceramic coating material containing cerium dioxide, method and product application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 of the present invention: preparation of CeO by broadband laser cladding 2 Gradient bioactive ceramic coating material: It is prepared from 70-10 kg of 40 μm titanium powder and 30-90 kg of 36 μm composite ceramic powder, of which the composite ceramic powder is made of 78 kg of CaHPO 4 2H 2 O with 22 kg of CaCO 3 Mix the obtained ceramic powder and add 0.6 kg, 4 μm rare earth oxide CeO 2 prepared.

[0041] The coating powder material of the first gradient layer pre-pressed on the surface of titanium alloy TC4 is: 70 kg of titanium powder mixed with 30 kg of composite ceramic powder and ground, and the coating powder material of the second gradient layer is: 40 kg of titanium powder It is made by mixing and grinding with 60 kg of composite ceramic powder, and the coating powder material of the third gradient layer is: 10 kg of titanium powder is mixed and ground with 90 kg of composite ceramic powder.

[0042] Preparation of CeO by Broadband Laser Cladding...

Embodiment 2

[0043] Example 2 of the present invention: preparation of CeO by broadband laser cladding 2 Gradient bioactive ceramic coating material: It is prepared from 75-15 kg of 20 μm titanium powder and 25-85 kg of 30 μm composite ceramic powder, of which the composite ceramic powder is made of 72 kg of CaHPO 4 2H 2 O with 28 kg of CaCO 3 Mix the obtained ceramic powder and add 0.4 kg, 1 μm rare earth oxide CeO 2 prepared.

[0044] The coating powder material of the first gradient layer pre-pressed on the surface of titanium alloy TC4 is: 75 kg of titanium powder mixed with 25 kg of composite ceramic powder and ground, and the coating powder material of the second gradient layer is: 45 kg of titanium powder It is made by mixing and grinding with 55 kg of composite ceramic powder, and the coating powder material of the third gradient layer is: 15 kg of titanium powder is mixed and ground with 85 kg of composite ceramic powder.

[0045] Preparation of CeO by Broadband Laser Cladding...

Embodiment 3

[0046] Example 3 of the present invention: preparation of CeO by broadband laser cladding 2Gradient bioactive ceramic coating material: It is prepared from 80-20 kg of 80 μm titanium powder and 20-80 kg of 50 μm composite ceramic powder, of which the composite ceramic powder is made of 80 kg of CaHPO 4 2H 2 O with 20 kg of CaCO 3 Mix the obtained ceramic powder and add 0.8 kg, 5 μm rare earth oxide CeO 2 prepared.

[0047] The coating powder material of the first gradient layer pre-pressed on the surface of titanium alloy TC4 is: 80 kg of titanium powder mixed with 20 kg of composite ceramic powder and ground, and the coating powder material of the second gradient layer is: 50 kg of titanium powder It is made by mixing and grinding with 50 kg of composite ceramic powder, and the coating powder material of the third gradient layer is: 20 kg of titanium powder is mixed and ground with 80 kg of composite ceramic powder.

[0048] Preparation of CeO by Broadband Laser Cladding ...

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Abstract

The invention discloses a material, method and product application for preparing a gradient bioactive ceramic coating containing CeO2 by broadband laser. Calculated according to weight components: it is prepared from 80-10 parts of titanium powder and 20-90 parts of composite ceramic powder. The composite ceramic powder is prepared from the ceramic powder obtained by mixing CaHPO4·2H2O with CaCO3 and then adding CeO2. The invention adopts the idea of ​​gradient design and adopts the broadband laser cladding technology. The prepared gradient bioactive ceramic coating has few cracks and holes, high hardness, good toughness, no amorphous phase in the coating, and the product can be implanted in the human body as a bone , a substitute for bone and joints, no rejection reaction, but also has anticoagulant effect and can prevent cancer.

Description

Technical field: [0001] The invention relates to a broadband laser preparation containing CeO 2 Materials, methods and product applications of ceramic coatings, especially preparation of CeO-containing coatings by broadband laser cladding 2 The material, method and product application of the gradient bioactive ceramic coating belong to the technical field of medical materials. Background technique: [0002] Bioceramics is an important part of biomedical materials, and plays an important role in the repair of human hard tissue defects and the reconstruction of lost physiological functions. The preparation technology of bioactive ceramic coatings can be generally divided into two categories: dry method and wet method. The dry method is to carry out various reactions and depositions in the gas phase, such as plasma spraying method, physical vapor deposition method, chemical vapor deposition method method, thermal spraying method, laser cladding method and ion implantation met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/32A61L31/08A61L33/02
Inventor 刘其斌李文飞吴玲
Owner GUIZHOU UNIV