Method of covering devices with ceramic layers, ceramic surface layers and coated devices

A surface coating and surface coating technology, which is applied in coating, pressure inorganic powder coating, heating inorganic powder coating, etc., can solve the problems of complex equipment and achieve strong adaptability

Inactive Publication Date: 2005-11-23
CERBIO TECH AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage is the complex equipment required, which includes hermetic vacuum units for CVD and PVD and high-temperature presses for powder technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] The titanium substrate is pretreated by abrasive blasting. In the first step, the surface is sandblasted with 100-120 mesh alumina abrasive to achieve a surface roughness of R a 0.6-0.7μm. In an optional additional step not essential to the method, the titanium surface with calcium aluminate (CA) was grit blasted a second time with an abrasive of about 22 μm.

[0060] Choose Calcium Aluminate Powder Temal White from Lafarge Aluminates  . This is Al 2 o 3 Calcium aluminate in a ratio of about 70 / 30 to CaO. However, similar results will be obtained with any other similar calcium aluminate powder.

[0061] The grain size of this powder was reduced by ball milling. Ball milling reduces the size of 90% of the grains to less than 10 μm. Ball milling is carried out in a rotating cylindrical plastic container, and silicon carbide balls with a diameter of 10 mm are used as the ball milling medium. The milling liquid is isopropanol. The total milling time was 72h.

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Abstract

Surface coating method for applying a chemically bonded ceramic coating on a sub-strate, comprising the steps of preparing a powder mixture based on a hydraulic ceramic binder phase, preparing a substrate surface, applying at least one layer of the powder mixture on the substrate, and finally hydrating the powder layer / layers by addition of a water-based solution. The present invention method can be applied without using elevated temperatures, complicated and complex equipment, while maintaining control over the microstructure of the coating. The inventive procedure can suitably be used for producing general orthopaedic and dental implants. The inventive coatings can also be used in microstructure technology applications or in wear and friction applications.

Description

field of invention [0001] The present invention relates to a method of partially or completely covering a device with a ceramic layer or coating consisting of a special ceramic material based on a hydraulic binder. In particular, the present invention relates to methods of coating medical devices for implantation with biocompatible ceramic coatings. Background of the invention [0002] ceramics [0003] Ceramic materials are generally hard and chemically stable. Ceramic materials also tend to be brittle and difficult to machine into the desired shape. Many ceramics also have minimal reactivity with organic tissue and are therefore suitable for implantation. [0004] Implants made of hydroxyapatite or other calcium phosphate ceramics are of particular interest in orthopedics. Hydroxyapatite is uniquely osseo-compatible because bone tissue regenerates well when joined to this ceramic. The material appears to be able to generate bones guided by nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/00A61L27/10A61L27/30A61L31/08C04B41/52C04B41/89C23C4/10C23C4/18C23C24/00C23C24/04C23C24/08
CPCC23C4/18C23C24/04C23C4/105C04B41/009A61L31/082A61L27/30C04B41/52C04B2111/00836C04B41/89A61L2420/02C23C24/085C23C4/11C04B41/4539C04B41/5032C04B41/5048C04B41/5041C04B41/53C04B41/5024C04B41/522C04B41/502C04B35/10C04B35/48A61L27/10C23C24/00
Inventor N·阿克森K·比约尔克伦德L·赫尔曼松
Owner CERBIO TECH AB
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