Heat treating method for pulse laser settled hydroxylapatite-bioglass composite film

A pulsed laser deposition, hydroxyapatite technology, applied in metal material coating process, vacuum evaporation coating, coating and other directions, can solve problems affecting application, affecting film performance, etc., to achieve the effect of improving crystallinity

Inactive Publication Date: 2009-10-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the film is in the amorphous state, the dissolution rate of the film in body fluid is too fast, which will affect its clinical application
[0004] Pulsed laser deposition of hydroxyapatite-biological glass composite film can not only coordinate the thermal expansion coefficient of the film and the substrate, but also have good biological activity, but there are a large number of spherical and irregular particles on the surface, when the substrate temperature is low ( If it is not higher than 200°C), the original HA component in the target still exists in the form of amorphous after deposition, which will affect the performance of the film

Method used

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  • Heat treating method for pulse laser settled hydroxylapatite-bioglass composite film
  • Heat treating method for pulse laser settled hydroxylapatite-bioglass composite film
  • Heat treating method for pulse laser settled hydroxylapatite-bioglass composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Preparation of pulsed laser deposited hydroxyapatite-bioglass composite film: mix highly crystalline HA and amorphous 45S5 bioglass powder at a weight ratio of 1:1, and then ball mill it under a pressure of 240MPa, cold isostatic pressing method Press into a Φ25mm×3mm sheet target, and heat treat the target at 600°C for 2 hours after pressing; fix the target and matrix material in the reaction chamber for ablation and deposition, and adjust the distance between the matrix and the target to 5.5cm , using a molecular pump to evacuate the deposition chamber to 5×10 -5 Pa, through the adjustment of the vacuum needle valve, argon gas is introduced, the pressure is 45Pa, the substrate is heated by the resistance wire, the heating rate is 40°C / min, and the temperature is 200°C, the target is 360r / h, the substrate is 40r / h Speed ​​rotation; start the laser, laser ablation target, choose KrF laser (wavelength 248nm), laser frequency 5-10Hz, pulse number 18000, laser output energ...

Embodiment 2

[0016] The pulsed laser-deposited hydroxyapatite-biological glass composite film obtained in Example 1 was heat-treated at 600°C in an ordinary box-type resistance furnace, kept for 1 hour, and the heating rate was 5°C / min, and then cooled with the furnace.

Embodiment 3

[0018] The pulsed laser-deposited hydroxyapatite-biological glass composite film obtained in Example 1 was heat-treated in a common box-type resistance furnace at 600°C, kept for 2 hours at a heating rate of 5°C / min, and then cooled with the furnace.

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Abstract

The invention discloses a heat treating method for pulse laser settled hydroxylapatite-bioglass composite film, pertaining to the technical field of non-metallic inorganic materials. The heat treating method heats the composite film on a general box-type resistance furnace with a heating speed of 4 DEG C / min to 5 DEG C / min, preserves temperature after heating to a temperature of 600 DEG C to 800 DEG C with a heat preservation time of 1h to 4h, and then cools the film with the furnace. The crystallinity of the composite film after heat treatment increases, HA in the film presents an a-axis orientation after heat treatment for 2h at the temperature of 700 DEG C and the HA in the film presents c-axis orientation after the heat treatment for 2h at the temperature of 800 DEG C; the heat treatment causes the cementing property between the film and a basal body to be higher than that of an original film and the critical load of the film is 17.5N after being heated for 1h at the temperature of 600 DEG C.

Description

technical field [0001] The invention relates to a heat treatment method for a composite thin film, in particular to a heat treatment method for a pulse laser deposited hydroxyapatite-biological glass composite thin film, and belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Hydroxyapatite (Hydroxyapatite, HA) is a ceramic material with high biocompatibility and bioactivity, and its composition is the same as that of human bone. It has become one of the most widely used implant film materials in clinical practice. The strength and elastic modulus of HA sintered body are very high, but the fracture toughness is small, and brittle fracture is very easy to occur. Surface coating technology is often used to prepare HA film on metal substrates such as titanium alloy, but HA and titanium alloy have different mechanical properties such as thermal expansion coefficient. There are large differences in performance and are prone to cracks....

Claims

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Application Information

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IPC IPC(8): C23C14/58C23C14/28C23C14/06
Inventor 陈传忠王佃刚于慧君马杰
Owner SHANDONG UNIV
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