Surface nanocrystallization method for hydroxyapatite coating
A hydroxyapatite, nanotechnology, applied in chemical instruments and methods, coatings, nanotechnology, etc., can solve problems that are not conducive to the interface bonding strength and long-term stability, lose the function of shielding the release of harmful ions, and the technical solution is not yet available. See reports and other issues to achieve the effects of being suitable for large-scale production, excellent biocompatibility, and firm binding
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Embodiment 1
[0018] (1) The first layer of hydroxyapatite coating with a thickness of 30-35 microns is prepared by plasma spraying with medical pure titanium as the matrix; the particle size of the hydroxyapatite powder is 38-45 microns, and the spraying power is 25kW , the plasma gas is argon gas and hydrogen gas (volume mixing ratio is 40:12), the spraying distance is 80-100 mm, and the powder feeding rate is 20-30 grams per minute;
[0019] (2) Repeat the above operation, during the operation, by using two spray guns to maintain the continuity of the spraying of the first layer and the second layer, a second layer of hydroxyapatite coating with a thickness of 20-25 microns is prepared on the surface of the first layer coating. layer; the particle size of the hydroxyapatite powder is 10-38 microns, and the spraying power is 30kW;
[0020] (3) Crystallization of the coating: the above-mentioned coating was raised from room temperature to 700° C. under the atmospheric environment, and kept...
Embodiment 2
[0022] (1) The first layer of hydroxyapatite coating with a thickness of 55-60 microns was prepared by plasma spraying with medical Ti6Al4V as the matrix; the particle size of the hydroxyapatite powder was 75-106 microns, and the spraying power was 35kW, The plasma gas is argon gas and hydrogen gas (volume mixing ratio is 40:12), the spraying distance is 90-100 mm, and the powder feeding rate is 20-30 grams per minute;
[0023] (2) Repeat the above-mentioned operation, by using two spray guns to maintain the continuity of the spraying of the first layer and the second layer, and prepare a second layer of hydroxyapatite coating with a thickness of 35-40 microns on the surface of the first layer coating. layer; the particle size of the hydroxyapatite powder is 38-53 microns, and the spraying power is 45kW;
[0024] (3) Crystallization treatment of the coating: the above-mentioned coating was raised from room temperature to 600° C. under the atmospheric environment, and kept for ...
Embodiment 3
[0026] (1) With medical pure titanium as the matrix, Al can be sprayed before spraying 2 O 3 For roughening treatment, the first layer of hydroxyapatite coating with a thickness of 35-40 microns is prepared by plasma spraying; the particle size of the hydroxyapatite powder is 45-90 microns, the spraying power is 30kW, and the plasma gas is mixed by volume The ratio of argon and hydrogen is 40:12, the spraying distance is 85-95 mm, and the powder feeding rate is 23-28 grams per minute;
[0027] (2) Repeat the above operation, during the operation, by using two spray guns to maintain the continuity of the spraying of the first layer and the second layer, a second layer of hydroxyapatite coating with a thickness of 25-30 microns is prepared on the surface of the first layer coating. layer; wherein the particle size of the hydroxyapatite powder is 20-38 microns, and the spraying power is 40kW;
[0028] (3) Crystallization treatment of coating: the above-mentioned coating was rai...
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