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, used in coatings, metal material coating processes, melt spraying, etc., to achieve the effect of ensuring photocatalytic performance, large social and economic benefits, and excellent mechanical properties
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Example Embodiment
[0049] Example 1:
[0050] In this embodiment, the substrate is a 304 stainless steel sheet with a thickness of about 2mm. The TiO 2 The thickness of the coating is 40μm, the TiO 2 TiO in coating 2 The crystal phase composition of TiO2 is anatase phase and rutile phase, in terms of parts by mass, 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 prepare a solvent. The commercially available TiO with an average particle size of 10nm-40nm and anatase crystal form 2 The powder is added to the above-mentioned prepared solvent, and mixed evenly by magnetic stirring to make TiO 2 Spraying liquid 1 with a solid content of 1 wt%. Spraying powder 2 is commercially available TiO with an average particle size of 10μm-40μm and a rutile crystal form 2 powder. The substrate used for spraying is a 304 stainless steel sheet with a thickness of about 2 mm. Befo...
Example Embodiment
[0055] Example 2:
[0056] This embodiment is basically the same as embodiment 1, the difference is that the TiO of the spraying liquid material in this embodiment 2 The solid content is 4wt%, and other experimental conditions are the same.
[0057] The above-mentioned TiO is measured by the coating microhardness test method 2 The microhardness of the coating is about 173.1HV, and the above 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 the composite flame spraying method in this example 2 The mechanical properties of the coating have been significantly improved.
Example Embodiment
[0059] Example 3:
[0060] This embodiment is basically the same as embodiment 1, the difference is that the TiO of the spraying liquid material in this embodiment 2 The solid content is 7wt%, and other experimental conditions are the same.
[0061] The above-mentioned TiO is measured by the coating microhardness test method 2 The microhardness of the coating is about 534.1HV, and the above-mentioned TiO is measured by the coating adhesion test method 2 The critical load of the coating is about 25.5N.
[0062] Compared with the comparative example, the TiO prepared by the composite flame spraying method in this example 2 The mechanical properties of the coating have been significantly improved.
[0063] figure 2 TiO prepared in Comparative Example, Example 1, Example 2, and Example 3 2 XRD pattern of the coating. The results show that the TiO prepared by flame spraying method with liquid material and micron powder as spraying raw materials 2 The coating contains two crystal phases of...
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