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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

Active Publication Date: 2012-03-14
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] (3) Chang-Jiu Li, Guan-Jun Yang, Ze Wang, Materials Letters 2003, 57: 2130-2134. It has been reported that nanostructured TiO has been successfully prepared by liquid phase thermal spraying method 2 coating, but from the reported results, the adhesion of the prepared coating still needs to be further improved

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  • Micro-nanometer structure TiO2 coating with high hardness and high adhesion force as well as preparation method thereof
  • Micro-nanometer structure TiO2 coating with high hardness and high adhesion force as well as preparation method thereof
  • Micro-nanometer structure TiO2 coating with high hardness and high adhesion force as well as preparation method thereof

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Experimental program
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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 is 7wt%, and other experimental conditions are 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 incre...

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Abstract

The invention discloses a micro-nanometer structure TiO2 coating with high hardness and high adhesion force and a preparation method thereof. The thickness of the TiO2 coating is 10mum to 100mum, the crystal phase compositions of TiO2 in the coating are anatase phase and rutile phase, and in addition, the anatase TiO2 accounts for 3 percent to 35 percent of the mass percent of the TiO2 coating. The liquid phase hot spraying coating method and the traditional hot spraying coating method are adopted and are combined, TiO2 liquid materials and powder are simultaneously sent into hot spraying coating flame, compared with the TiO2 coating obtained by the liquid phase hot spraying coating method, the prepared TiO2 coating has the advantages that the microhardness is improved by nearly 10 times,the adhesion force is improved nearly 3 times, the photocatalysis function of the TiO2 coating is favorably realized, important application values are realized, and the micro-nanometer structure TiO2coating is hopeful to generate huge social and economic benefits.

Description

technical field [0001] The present invention relates to substrate surface TiO 2 In the field of coating technology, especially a kind of micro-nano structure TiO with high hardness and high adhesion 2 Coatings and methods for their preparation. Background technique [0002] Titanium dioxide (TiO 2 ) has broad application prospects in photocatalytic oxidation degradation of environmental pollutants due to its excellent properties such as high photocatalytic activity, stable chemical properties, non-toxicity and good photocorrosion resistance, especially in the current background of increasing emphasis on environmental protection Next, the photocatalytic nano-TiO with industrialization prospect 2 The development of thin films or coatings is urgent. [0003] TiO 2 The traditional preparation methods of coatings mainly include sol-gel method, physical vapor deposition method, chemical vapor deposition method, electrochemical method, etc. The traditional preparation methods ...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/11C23C4/129
Inventor 李华袁建辉丁思月薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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