Micro-nanometer structure TiO2 coating with high hardness and high adhesion force as well as preparation method thereof
A micro-nano-structured, high-adhesion technology, applied in coatings, metal material coating processes, melt spraying, etc., to achieve high anatase phase content, excellent mechanical properties, and ensure the effect of photocatalytic performance
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Embodiment 1
[0050] In this embodiment, the substrate is a 304 stainless steel sheet with a thickness of about 2mm, and the TiO on the surface of the substrate 2 coating thickness is 40µm, the TiO 2 TiO in coating 2 The crystal phase composition is anatase phase and rutile phase, according to the mass fraction, anatase TiO 2 Accounted for 3 to 35%. The TiO 2 The specific preparation method of the coating is as follows:
[0051] Mix deionized water and absolute ethanol at a volume ratio of 1:1 to make a solvent, and commercially available TiO with an average particle size of 10nm to 40nm and anatase crystal form 2 Add the powder into the prepared solvent above, and mix it uniformly by magnetic stirring to make TiO 2 Spray liquid material 1 with a solid content of 1 wt%. Spraying powder 2 is commercially available TiO with an average particle size of 10 μm to 40 μm and a crystal form of rutile 2 powder. The substrate used for spraying is a 304 stainless steel sheet with a thickness o...
Embodiment 2
[0056] The present embodiment is basically the same as embodiment 1, the difference is that the TiO of the spray liquid material in the present embodiment 2 The solid content is 4wt%, and other experimental conditions are the same.
[0057] Utilize coating microhardness test method to measure above-mentioned TiO 2 The microhardness of the coating is about 173.1HV, and the above-mentioned TiO is measured by the coating adhesion test method 2 The critical load of the coating is about 17.7N.
[0058] Compared with the comparative example, the TiO prepared by composite flame spraying method in this example 2 The mechanical properties of the coating are significantly improved.
Embodiment 3
[0060] The present embodiment is basically the same as embodiment 1, the difference is that the TiO of the spray liquid material in the present embodiment 2 The solid content was 7wt%, and other experimental conditions were the same.
[0061] Utilize coating microhardness test method to measure above-mentioned TiO 2 The microhardness of the coating is about 534.1HV, and the above-mentioned TiO 2 The critical load of the coating is about 25.5N.
[0062] Compared with the comparative example, the TiO prepared by composite flame spraying method in this example 2 The mechanical properties of the coating are significantly improved.
[0063] figure 2 It is the TiO prepared in comparative example, embodiment 1, embodiment 2, embodiment 3 2 XRD pattern of the coating. The results show that the TiO prepared by flame spraying method using liquid material and micron powder as spraying raw materials 2 Both coatings contain two crystal phases of anatase and rutile, and with the inc...
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