High temperature resistance polymolecular layer boundary lubrication film for titanium based material surface and preparation method thereof

A multi-molecular layer and boundary lubrication technology, which is applied in the field of material surface friction and wear and solid lubrication, can solve the problems of poor wear resistance, limitation, and large surface friction coefficient, and achieve simple preparation process, low cost, and improved surface wear resistance Effect

Inactive Publication Date: 2014-01-22
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

However, its large surface friction coefficient and poor wear resistance limit its excellent performance in high-speed drying or other special harsh atmosphere environments.
[0003] In recent years, micro-arc oxidation [1] (see: Bemporad, E., et al., Modeling, production and characterization of duplex coatings (HVOF and PVD) on Ti–6Al–4V substrate for specific mechanical applications.Surface and Coatings Technology ,2007.201(18):p.7652-7662.), surface penetration plating [2] (see: Fernandes,B.B.,et al.,Effects of high temperature plasma immersion ion implantation on wear resistance of Ti-Si-B sintered alloys .Surface and Coatings Technology, 2013.228: p.195-200.) and other surface modification or coating processes [3] (see: Wang, D.Y., Chang, C L., Chen, Z Y., Ho, W Y, Microstructural and tribological characterization of MoS 2 –Ti composite solid lubricating films.Surface and Coatings Technology, 1999.120-121: p.629-635.), improving the wear resistance of the surface of titanium-based materials, and using organic compounds on the surface of titanium-based materials to improve its wear resistance technology is fresh There are reports

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  • High temperature resistance polymolecular layer boundary lubrication film for titanium based material surface and preparation method thereof
  • High temperature resistance polymolecular layer boundary lubrication film for titanium based material surface and preparation method thereof
  • High temperature resistance polymolecular layer boundary lubrication film for titanium based material surface and preparation method thereof

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preparation example Construction

[0027] The essential content of the high temperature resistant multi-molecular layer boundary lubricating film on the surface of the titanium-based material of the invention is to graft hydrogel on the surface of the titanium-based material. The technical route of its preparation method is: pretreatment→surface hydroxylation→grafting graphene oxide nanosheets→grafting hydrogel; after final drying, a high-temperature resistant multi-molecular layer boundary lubricant film can be obtained on the surface of the titanium-based material. Specifically, the steps are as follows:

[0028] Step 1. Grinding and polishing the surface of the titanium-based material until the surface roughness Ra is not greater than 1 μm, cleaning and drying to remove impurities and oil on the surface of the material.

[0029] Step 2: After cleaning and drying, processes such as alkali treatment, anodic oxidation and Piranha solution treatment can be used to make the surface of the titanium-based material ...

Embodiment 1

[0037] The steps of preparing a high temperature resistant multi-molecular layer boundary lubricant film on the surface of pure titanium are as follows:

[0038] Step 1), the pure titanium is ground and polished to a surface roughness Ra of no more than 1 μm, cleaned and dried to remove impurities and oil on the surface.

[0039] Step 2), using the anodic oxidation method to prepare TiO with -OH groups on the surface of pure titanium 2 nanotubes, such as figure 1 shown. Electrochemical experiments use a platinum electrode as the cathode and pure titanium as the anode. The electrolyte solution is: ammonium fluoride 0.5wt.%, deionized water 2vol.%, ethylene glycol 98vol.%. The anodic oxidation experiment was carried out in Keithley2400 model constant voltage power supply, the voltage was 40V, and the oxidation reaction time was 3h. The sample whose surface was cleaned and dried was put into the above electrolytic solution. After the reaction was completed, it was ultrasonic...

Embodiment 2

[0046] Embodiment 2: The steps of preparing a high-temperature resistant multi-molecular layer boundary lubricant film on the surface of titanium-zirconium-niobium alloy are as follows:

[0047] Step 1), the titanium-zirconium-niobium alloy is pre-ground and polished to a surface roughness Ra of not greater than 1 μm, cleaned and dried.

[0048] In step 2), the hydrophilic functional group -OH is prepared on the surface of the titanium-zirconium-niobium alloy by alkali treatment. Alkali treatment process: prepare NaOH aqueous solution 5mol L -1 , keeping the previously treated titanium-zirconium-niobium alloy in the above-mentioned NaOH solution at 60-90° C. for 6-8 hours, then taking it out for cleaning and drying.

[0049] Step 3), using aminopropyltrimethoxysilane coupling agent to connect the surface hydroxylated titanium-zirconium-niobium alloy and graphene oxide nanosheets. Prepare the silane coupling agent solution: the concentration of trimethoxysilane coupling agent...

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Abstract

The invention discloses a process for preparing a high temperature resistance polymolecular layer boundary lubrication film for a titanium based material surface. The process comprises the following steps: hydroxylating the surface of a clean titanium based material which is grinded, polished and cleaned by adopting alkali treatment, anode oxidation, Piranha solution treatment and other methods; grating an oxidized graphene nano-wafer on the hydroxylated surface of the titanium based material through a silane coupling agent; putting the titanium based material of which the surface is grafted by the oxidized graphene nano-wafer in an oxidized graphene nano-wafer water solution, performing a radical polymerization reaction and drying to prepare a latticed high temperature resistance polymolecular layer boundary lubrication film, namely hydrogel. According to the method, the abrasion resistance of the surface of the titanium-based material is modified by utilizing the hydrogel organic polymer material for the first time, the advantages of low friction coefficient and good heat tolerance of hydrogel can be played sufficiently, the abrasion resistance of the titanium-based material surface in a dry-state environment can be effectively improved, and the application range of the titanium-based material is enlarged. The process has a definite scientific meaning and great application value.

Description

technical field [0001] The invention relates to the field of material surface friction and wear and solid lubrication, in particular to a method for preparing a multi-molecular layer boundary lubricating film with high temperature resistance on the surface of titanium and titanium alloy materials. Background technique [0002] Titanium and titanium alloys are important structural metals developed in the 1950s. They have excellent physical and chemical properties such as low density, high specific strength, corrosion resistance and heat resistance, and good biocompatibility. They are widely used in Aerospace, petrochemical, metallurgy, electric power and biomedical fields. However, its large surface friction coefficient and poor wear resistance limit its excellent performance in high-speed drying or other special harsh atmosphere environments. [0003] In recent years, micro-arc oxidation [1] (see: Bemporad, E., et al., Modeling, production and characterization of duplex coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00
Inventor 魏强吝德智张善勇
Owner TIANJIN UNIV
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