Method for improving biological activity of titanium nitride ceramic coating by ozone treatment
A bioactive technology of titanium nitride ceramics, applied in coatings, medical science, prostheses, etc., can solve the problem of reducing the hardness or wear resistance of titanium nitride ceramics, changing the color of titanium nitride ceramics, and not suitable for preclinical treatment To achieve the effect of maintaining color, high hardness, improving biocompatibility and bioactivity
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[0011] Example 1
[0012] Firstly, a titanium nitride ceramic layer is prepared on the surface of a wafer-like pure titanium metal by gas nitriding. The ceramic layer is golden yellow with a microhardness of HV1131.2 (±78.3), and a contact angle of distilled water on its surface is 70.1° . Second, the samples with titanium nitride ceramic coating can be ultrasonically cleaned and dried naturally. Next, put the sample into a fully cleaned and dried quartz tube. The quartz tube is placed horizontally, and silicone rubber plugs with reserved air passage holes are installed at both ends of the quartz tube. One end is connected to the ozone generator and the other end is connected Ozone tail gas treatment device. After connecting the gas circuit, adjust the heating device to heat the quartz tube and control the reaction temperature at 30°C. Pass in the gas produced by the oxygen source ozone generator, where the concentration of ozone is 10mg / L, the working pressure is maintained a...
Example Embodiment
[0022] Example 2
[0023] The treatment method is basically the same as in Example 1, except that the heating temperature is controlled at 100° C., the concentration of ozone is 20 mg / L, and the continuous gas supply time is 2 hours.
[0024] The sample obtained after treatment is still golden yellow; the microhardness of the coating is HV1114.3 (±63.6), which is not statistically different from the untreated sample; while maintaining good wear resistance; the contact angle of distilled water is 0°, which is significantly lower than that before treatment, which indicates that the surface wettability of the titanium nitride ceramic layer treated by the method of the present invention is very good; the scanning electron microscope observation results show that the surface morphology of the sample after the ozone treatment has not occurred Variety.
Example Embodiment
[0032] Example 3
[0033] The treatment method is basically the same as in Example 1, except that the heating temperature is controlled at 100° C., the concentration of ozone is 30 mg / L, and the continuous gas supply time is 1 hour.
[0034] The sample obtained after treatment is still golden yellow; the microhardness of the coating is HV1164.2 (±49.27), which has no statistical difference compared with the untreated sample; while maintaining good abrasion resistance; the contact angle of distilled water is 5°, which is greatly reduced from before treatment, which indicates that the surface wettability of the titanium nitride ceramic layer treated by the method of the present invention is very good; the scanning electron microscope observation results show that the surface morphology of the sample after the ozone treatment has not changed.
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