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Porous titanium coating atmospheric plasma spraying gas protecting apparatus and its spraying method

A gas protection device and plasma technology, which is applied in the field of biomedical materials engineering, can solve the problems of insufficient consideration of the flow direction of the protective gas, metal oxidation, and low metal spraying efficiency, so as to improve the spraying efficiency and prevent rapid escape.

Inactive Publication Date: 2006-03-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to insufficient consideration of the flow direction of the protective gas in the existing thermal spraying inert gas protection device, some metals are often oxidized, and the efficiency of metal spraying is not high.

Method used

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  • Porous titanium coating atmospheric plasma spraying gas protecting apparatus and its spraying method
  • Porous titanium coating atmospheric plasma spraying gas protecting apparatus and its spraying method
  • Porous titanium coating atmospheric plasma spraying gas protecting apparatus and its spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Connect and fix the base 1 of the inert gas protection device with the nozzle on the conventional atmospheric plasma spraying equipment, soak 50% of the titanium powder with a particle size of 40 microns and 50% of the titanium powder with a particle size of 200 microns in alcohol, and then use Ultrasonic mixing for 30 minutes, after drying at room temperature, use argon gas to feed the titanium powder into the powder transfer interface tube 7 on the gas protection device, and use the inert gas protection cover formed by this device. Under the action of the inert gas protection cover, use the following optimization Spraying titanium powder on the titanium substrate to obtain the biomedical porous titanium coating. The specific spraying process parameters used in this embodiment are shown in Table 1 of Spraying Parameters. The XRD analysis of the coating obtained under the spraying process parameters, the results are shown in Figure 4 , The results show that the coating is ...

Embodiment 2

[0040] Connect and fix the base 1 of the inert gas protection device with the nozzle on the atmospheric plasma spraying equipment, soak 80% of the 20-micron and 20% of the 250-micron titanium powder in alcohol, and then mix with ultrasonic for 30 minutes in the atmosphere. After drying, use argon gas to feed the titanium powder into the powder conveying interface tube 7 on the gas protection device, and use the inert gas protection cover formed by this device. Under the action of the inert gas protection cover, use the following optimized spraying process parameters to spray the titanium powder Spray on the titanium substrate to obtain the biomedical porous titanium coating. The specific spraying process parameters used in this embodiment are shown in Table 2 of Spraying Parameters. The XRD analysis results show that the coating is composed of titanium, the coating is not oxidized, and no titanium oxide is generated. The scanning electron microscope analysis of the coating confirm...

Embodiment 3

[0042] Embodiment 3: Connect and fix the base 1 of the inert gas protection device with the nozzle on the atmospheric plasma spraying equipment, soak 20% of 40 micron and 80% of 100 micron titanium powder in alcohol, and then mix with ultrasonic 30 Minutes, after doing what in the atmosphere, use argon to send the titanium powder into the powder delivery interface tube 7 on the gas protection device, use the inert gas protection cover formed by this device, and use the following optimized spraying under the action of the inert gas protection cover Process parameters: The titanium powder is sprayed on the titanium substrate to obtain the biomedical porous titanium coating. The specific spraying process parameters used in this embodiment are shown in Table 3 of Spraying Parameters. The XRD analysis results of the coating obtained under the spraying process parameters show that the coating is composed of titanium, the coating has not been oxidized, and no titanium oxide is formed. Th...

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Abstract

This invention relates to a spraying gas protection device of multi-hole Ti coating atmosphere plasma and its method. Said device is composed of a base with a hole at the center, a hollow tube connected with the base, a protecting gas inlet mouthpiece designed on the hollow tube, a protection gas distribution chamber, a jet exhaust of the protection gas and a powder mouthpiece. Said device is connected with the nozzle on an ordinary atmosphere plasma spraying device to spray Ti coating to meet the needs of using different sizes of Ti powder as the raw material to be immersed in alcohol and mixed evenly with supersonic waver to be dried and manufactured to Ti coating with optimized spraying parameters under the protection cover of an inert gas formed in this device.

Description

1. Technical Field [0001] The invention relates to a biomedical porous titanium coating spraying gas protection device and a spraying method thereof, in particular to an inert gas protection device for atmospheric plasma spraying of a biomedical porous titanium coating and a spraying method thereof, belonging to biomedical material engineering field. 2. Background technology [0002] Titanium is widely used in the repair of hard tissues in humans or animals due to its superior biocompatibility. At present, implants based on dense titanium are widely used clinically. However, titanium metal is a biologically inert material, and it tends to loosen after being implanted in the body, causing implantation failure. Therefore, people introduce a bioactive surface coating represented by hydroxyapatite on the surface of a dense titanium substrate, or introduce a porous titanium structure on the surface of the titanium. The former uses a bioactive surface coating to form a high-strength bi...

Claims

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Application Information

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IPC IPC(8): C23C4/00C23C4/08C23C4/134C23C4/137
Inventor 杨帮成陈和仲杨秀东陈继镛冯家岷刘晓光顾忠伟张兴栋
Owner SICHUAN UNIV
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