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High-temperature anti-oxidation self-lubricating composite coating as well as preparation and use methods thereof

A high-temperature anti-oxidation and self-lubricating technology, applied in lubricating compositions, petroleum industry, etc., can solve problems such as zirconium alloy pollution, affecting processing accuracy and service life

Active Publication Date: 2022-06-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high-temperature hot extrusion environment, zirconium alloys are easily polluted by elements such as oxygen, nitrogen, and hydrogen, and are prone to violent reactions with water vapor (ie, hydrogen embrittlement), and the temperature of zirconium alloy blanks is much higher than that of hot extrusion processing. The temperature of the mold greatly affects the processing accuracy and service life of the hot extrusion process. It can be seen that there are many challenges in the hot extrusion process of zirconium alloys, such as reducing extrusion friction during processing to improve the smoothness and precision of zirconium alloy pipes. High degree, to prevent many problems such as a large amount of oxidation in the extrusion process of zirconium alloy

Method used

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  • High-temperature anti-oxidation self-lubricating composite coating as well as preparation and use methods thereof
  • High-temperature anti-oxidation self-lubricating composite coating as well as preparation and use methods thereof
  • High-temperature anti-oxidation self-lubricating composite coating as well as preparation and use methods thereof

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preparation example Construction

[0034] The preparation method of the high-temperature oxidation-resistant self-lubricating composite material of the present invention comprises the following steps:

[0035] S1, select the following raw materials: sodium silicate, molybdenum disulfide, graphite lubricant, silane coupling agent, silicon dioxide, diboron trioxide, ethyl orthosilicate, ammonia water, other additives and deionized water;

[0036]S2, after selecting the raw material, taking by weight sodium silicate is 65-84 parts, molybdenum disulfide 2-6 parts, graphite lubricant is 4-8 parts, silicon dioxide is 4-9 parts, two trioxide 2-5 parts of boron, 0.5-1 part of silane coupling agent, 2-4 parts of other additives and 13-17 parts of deionized water, other additives include diluent, plasticizer, defoamer and toughening agent, The mass ratio of diluent, plasticizer, defoaming agent and toughening agent is 1:l:l:l, the diluent is absolute ethanol, the plasticizer is phthalate, and the defoamer is The agent a...

Embodiment 1

[0044] Step 1, according to weight parts, take by weighing 65 parts of sodium silicate, 6 parts of molybdenum disulfide, 4 parts of graphite lubricant, 4 parts of silicon dioxide, 2 parts of boron trioxide, 0.75 parts of silane coupling agent, other The additives are 2 parts and 17 parts of deionized water. Among the other additives, the diluent is anhydrous ethanol, the plasticizer is phthalate, and the defoamer is R-307 produced by Lantian Technology. Defoamer, the toughening agent adopts commercially available EPR (ethylene propylene rubber) toughening agent.

[0045] Step 2, weigh 6 parts of molybdenum disulfide and 4 parts of graphite lubricant according to parts by weight, add them to the planetary ball mill in turn, then add the grinding aid and grinding balls, and perform ball milling for 4h, and the ball milling speed is 400r / min , after the ball milling is completed, a ball-milling mixture is obtained, in which the mass ratio of the sum of the mass of molybdenum disu...

Embodiment 2

[0052] Step 1, according to weight parts, take by weighing 84 parts of sodium silicate, 4 parts of molybdenum disulfide, 6 parts of graphite lubricant, 7 parts of silicon dioxide, 3 parts of boron trioxide, 0.5 parts of silane coupling agent, other The additives are 3 parts and 15 parts of deionized water. Among other additives, the diluent is anhydrous ethanol, the plasticizer is phthalate, the defoamer is Blue Sky Technology R-307, and the toughening agent is R-307. The agent uses EPR.

[0053] Step 2, weigh 4 parts of molybdenum disulfide and 6 parts of graphite lubricant according to parts by weight, add them to the planetary ball mill in turn, then add the grinding aid and grinding ball, and perform ball milling for 5h, and the ball milling speed is 350r / min , after the ball milling is completed, a ball-milling mixture is obtained, in which the mass ratio of the sum of the mass of molybdenum disulfide and graphite lubricant to the grinding aid is 4:1, and the mass ratio o...

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Abstract

The invention discloses a high-temperature anti-oxidation self-lubricating composite coating as well as a preparation method and a use method thereof. The preparation process comprises the following steps: carrying out ball milling on molybdenum disulfide and a graphite lubricant; adding the ball-milled mixture into a mixed solution of tetraethoxysilane and ammonia water, and then uniformly mixing, separating and drying to obtain the SiO2-based solid lubricant of the airtight oxidation film; magnetically stirring sodium silicate, silicon dioxide, diboron trioxide, other additives, a solid lubricant of a SiO2-based airtight oxidation film, a dilute solution of a silane coupling agent and deionized water to obtain the high-temperature antioxidant self-lubricating composite material. The lubricating agent comprises the following components in parts by mass: 65-84 parts of sodium silicate, 2-6 parts of molybdenum disulfide, 4-8 parts of a graphite lubricant, 4-9 parts of silicon dioxide, 2-5 parts of diboron trioxide, 0.5-1 part of a silane coupling agent, 2-4 parts of other additives and 13-17 parts of deionized water. According to the high-temperature anti-oxidation self-lubricating composite coating, the hot extrusion friction coefficient can be effectively reduced, and the heat transfer performance in the hot extrusion process is delayed.

Description

technical field [0001] The invention belongs to the technical field of lubricating materials, and in particular relates to a high-temperature anti-oxidation self-lubricating composite coating and a preparation and use method thereof. Background technique [0002] Zirconium alloy is because of its high melting point, high strength, small expansion coefficient, and small thermal neutron absorption cross section (for neutrons of 2200m / s, the capture cross section of pure zirconium is only 0.18×10 -28 m 2 ), resistance to high temperature water and superheated steam, corrosion resistance, etc. Nuclear grade zirconium alloys are widely used as key materials for nuclear fuel elements in water-cooled nuclear reactors, such as various cladding, support, shielding components, etc. Among them, zirconium alloy hot extrusion is the key process for the production of nuclear fuel elements. However, due to the high temperature hot extrusion environment, zirconium alloys are easily contam...

Claims

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Application Information

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IPC IPC(8): C10M173/02C10M177/00C10N50/02C10N40/24C10N30/06C10N30/08C10N30/10
CPCC10M173/02C10M177/00C10N2050/02C10N2040/242C10N2040/24C10N2030/06C10N2030/08C10N2030/10C10M2201/105C10M2201/085C10M2201/041C10M2201/066C10M2201/102C10M2201/087C10M2207/021C10M2207/285
Inventor 高原王洋潘奘吴彤王伟王快社
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY