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Ti surface HA active coating biological material and its preparation method

A biomaterial and active coating technology, applied in the field of powder metallurgy, can solve the problems of easy peeling and low bonding strength between the coating and the substrate, and achieve the effect of ensuring no decomposition, reducing voids, and improving the bonding strength of the interface

Inactive Publication Date: 2003-03-05
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many methods of coating HA coating on the surface of Ti, such as plasma spraying, laser cladding, sol-gel, acid-base treatment, and electrophoretic deposition. One of the main problems is that the bonding strength between the coating and the substrate is low. easy to peel off

Method used

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  • Ti surface HA active coating biological material and its preparation method
  • Ti surface HA active coating biological material and its preparation method
  • Ti surface HA active coating biological material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1. Take 4.8g of HA and 0.1g of water glass into a powder mixer and mix evenly, then bake in an oven at 100°C for 1 hour to obtain passivated HA powder as coating powder ①. Take 5.0g of titanium powder and 0.1g of coating powder into a graphite mold of φ24, install the pressure head and compact it, then put it into the spark plasma sintering equipment (SPS), vacuumize to 4Pa, pressurize to 30MPa, and heat up The speed was 150°C / min, the temperature was raised to 900°C and kept for 2 minutes, and then cooled to room temperature and taken out to obtain the biological material with HA active coating on the Ti surface.

Embodiment 2

[0013] Embodiment 2. Get 5.0g of titanium powder and 1.0.2g of coating powder into the graphite mold of φ24, put on the pressure head and compact it, then put it into SPS, vacuumize to 10Pa, pressurize 20MPa, and the heating rate is 80°C / min, heat up to 850°C for 10min, cool to room temperature and take out to obtain HA active coating biomaterial on Ti surface.

Embodiment 3

[0014] Embodiment 3. Get 4.0g of HA, 0.7g of titanium powder and 0.3g of water glass and put them into a powder mixer and mix them evenly, then bake in an oven at 100°C for 1 hour to obtain passivated HA mixed powder, as a coating Layer powder ②. Take respectively 5.0g of titanium powder and 0.1g of coating powder into a φ24 graphite mold, install the pressure head for compaction, then put it into the SPS, vacuumize to 6Pa, pressurize at 25MPa, and heat up at a rate of 150℃ / min , heated to 950° C. for 6 minutes, cooled to room temperature, and taken out to obtain a biomaterial with HA active coating on the Ti surface.

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Abstract

The present invention relates to a Ti surface HA active coating biological material and its preparation method, belonging to the field of powder metallurgical technology. Said material is characterized by that the coating of Ti base body surface contains (wt%) 80-96% of hydroxyapa-tite (HA), 0-14% of Ti and 4-6% of water glass. Its preparation method includes the following steps: selecting and using HA powder can (HA+Ti) mixture powder, adding water glass as passivating agent and as coating material of Ti surface, in the mould placing the above-mentioned coating material on the Ti surface, and placing then into a discharge plasma sintering equipment (SPS) to make sintering, vacuum-pumping, pressurizing to 20-30 MPa, quickly-heating to 850-950 deg.C in 80-150 deg.C / min. heat-insulating for2-10 min. so as to obtain the invented biological material.

Description

technical field [0001] The invention discloses a method for preparing a Ti surface HA active coating biological material, which belongs to the technical field of powder metallurgy. Background technique [0002] Hydroxyapatite (hereinafter referred to as HA) active coating material on titanium surface combines the good mechanical properties of metal Ti and the good biocompatibility and biological activity of HA, and is currently a promising material for biological hard tissue implants. At present, there are many methods of coating HA coating on the surface of Ti, such as plasma spraying, laser cladding, sol-gel, acid-base treatment, and electrophoretic deposition. One of the main problems is that the bonding strength between the coating and the substrate is low. Afterwards, it is easy to peel off. The invention adopts spark plasma sintering technology (SPS) to prepare Ti surface HA active coating biological material, and the technology has the characteristics of low sinterin...

Claims

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Application Information

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IPC IPC(8): A61L27/06A61L27/32B22F7/02
Inventor 张久兴张光磊钟涛兴张国珍
Owner BEIJING UNIV OF TECH
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