Preparation method of calcium-magnesium-silicon multiphase ceramic coating for titanium-based artificial joint handle
A technology of artificial joint and ceramic coating, applied in the direction of coating, can solve the problem of low bonding strength
Inactive Publication Date: 2012-01-04
SICHUAN UNIV
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[0007] At present, using the calcium-magnesium-silicon multiphase ceramics as coating materials to prepare biomedical coatings for titanium-based artificial joint handles with high metal-ceramic bonding strength and excellent biological properties has not been reported at home and abroad.
Therefore, in order to solve the problem of low bonding strength between the HA coating and the TC4 substrate in clinical practice, the present invention, on the basis of previous work, proposes to apply a layer of calcium-magnesium-silicon multiphase ceramic MC2 coating on the titanium alloy substrate by the plasma spraying method. Combining the advantages of the two, a titanium-based artificial joint stem / multiphase ceramic coating composite bone repair material with high metal-ceramic bonding strength and excellent biological properties is obtained
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[0020] specific implementation plan
[0021] The present invention will be further elaborated below in conjunction with the specific examples given by the inventor. It should be noted that the present invention is not limited to this embodiment, and those skilled in the art can add and replace technical features within the scope of the present invention, all of which belong to the protection scope of the present invention.
[0022] Use spray drying and granulation technology to granulate and spheroidize MC2 multiphase ceramic powder in block or granular form (with small aspect ratio) (the main working parameters of the spray dryer are: the inlet air temperature is 250±10 °C; the outlet air temperature is 250±10 °C; 120±10 ℃), and then use methods such as sieving to obtain spherical powder suitable for spraying, which greatly improves the fluidity of the ceramic powder, and the powder morphology before and after spraying is as attached figure 1 shown. Using the spraying proce...
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Abstract
The invention relates to a preparation method of a calcium-magnesium-silicon multiphase ceramic coating for a titanium-based artificial joint handle, and more specifically relates to a ceramic coating / titanium-alloy-based artificial joint handle supported bone repairing material formed by depositing a calcium-magnesium-silicon bioactive ceramic coating on a titanium-alloy (Ti-6Al-4V)-based artificial joint handle and a preparation method thereof, belonging to the field of biomedical materials. The preparation method is characterized in that the calcium-magnesium-silicon multiphase ceramic coating contains akermanite, dicalcium silicate and calcium silicate used as main crystal phases and simultaneously contains a little amount of glass. In the preparation method, lump or granular (small-slenderness-ratio) multiphase ceramic powder is primarily selected as a raw material, a spherical target powder material suitable for spray coating is prepared by powder granulation and spheroidization through a spray drying method, screening and other means, and after spheroidization, the powder fluidity is greatly improved; and then the spheroidized calcium-magnesium-silicon multiphase ceramic powder is spray-coated on the cleaned and sand-blasted titanium-based artificial joint handle by adopting a plasma spray coating technology, and the obtained coating is subjected to postheat treatment to improve the crystallinity degree and stability of the coating. The bonding strength of the titanium-based calcium-magnesium-silicon multiphase ceramic coating is about 35MPa and is much higher than that of a clinically used titanium-based HA (hydroxyapatite) coating (about 18MPa). Biological experiments show that the supported titanium-based artificial joint handle / ceramic coating composite bone repairing material provided by the invention has excellent bioactivity and cytocompatibility.
Description
technical field [0001] The invention relates to a method for preparing a calcium-magnesium-silicon multiphase ceramic coating for a titanium-based artificial joint handle, more precisely, it relates to a calcium-magnesium-silicon-based biological coating deposited on a titanium alloy (Ti-6Al-4V)-based artificial joint handle. The invention relates to a ceramic coating / titanium alloy-based artificial joint stem bearing bone repair material composed of an active ceramic coating and a preparation method thereof, belonging to the field of medical biomaterials. Background technique [0002] Due to their good mechanical properties and biocompatibility, metal materials have been widely used in the reinforcement, repair and replacement of some human organs in clinical medicine. Compared with other metals, titanium and its alloys have the characteristics of excellent biocompatibility, corrosion resistance, light weight, high strength, and elastic modulus similar to bone, and have bec...
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IPC IPC(8): A61L27/30
Inventor 陈显春尹光福黄忠兵廖晓明姚亚东
Owner SICHUAN UNIV
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