Abrasion-proof self-lubricating composite material and its preparation method

A composite material and self-lubricating technology, which is applied in the field of wear-resistant and self-lubricating composite materials and their preparation, can solve the problems of high price, material hardness, creep resistance, limited improvement of wear resistance, and unstable performance. Improved hardness and creep resistance, remarkable hardness and creep resistance, and good interface bonding

Inactive Publication Date: 2009-03-18
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Chinese invention patent CN 1176153C discloses a polytetrafluoroethylene wear-resistant composite material containing carbon nanotubes, Chinese invention patent CN 1844228A discloses a preparation method of a rare earth modified carbon nanotube/polytetrafluoroethylene composite material, China Invention patent CN 1775846A discloses a polytetrafluoroethylene wear-resistant composite material containing transition metal disulfide nanotubes, and Chinese invention patent CN 1699464A discloses a nano-Si 3 N 4 /Preparation method of polytetrafluoroethylene wear-resistant composite material, but f...

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  • Abrasion-proof self-lubricating composite material and its preparation method
  • Abrasion-proof self-lubricating composite material and its preparation method
  • Abrasion-proof self-lubricating composite material and its preparation method

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Embodiment Construction

[0019] The formula of embodiment 1~embodiment 5

[0020]

[0021] The composite material prepared by the prescription of embodiment 1~embodiment 5, its preparation method comprises the following steps successively:

[0022] A. Add nanoporous silica to the suspended PTFE resin molding powder, put it in the mold, hold the pressure for 1-10min under 40-80MPa, and cold-press molding;

[0023] B. Put the pressed sample into a high-temperature sintering furnace, keep it at 300-350°C for 1-1.5 hours, then raise the temperature to 370-385°C, and keep it for 2-3 hours to obtain a composite material.

[0024] The product performance of embodiment 1~embodiment 5

[0025]

[0026] Note: According to the national standard GB 3960-83 to test the friction and wear properties of materials, dry friction at room temperature, and the pair is GCr15 steel ring.

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Abstract

The invention relates to an abrasion resistant self-lubricating composite material and a preparation method thereof. The raw materials in weight percentage of the material are: 1 to 15 percent of nano-porous silicon dioxide and 85 to 99 percent of suspended PTFE resin moulding powder. The material can be widely applied to the fields of lubricating, sealing and so on, is made into various parts such as bushes, sealing rings, guiding rings and so on, and is suitable for the working occasions at ultralow temperature and ultrahigh temperature, such as oil forbidden self-lubricating abrasion resistant parts of ultralow temperature refrigerating machines, liquid fuel pumps, high pressure pumps, oxygen generating devices, high temperature driers, conveyor belts inside furnaces, medicines and foods and so on, and dynamic seals of liquid or gas of an engine.

Description

technical field [0001] The invention relates to a wear-resistant self-lubricating composite material and a preparation method thereof. Background technique [0002] Polytetrafluoroethylene (PTFE) has excellent heat resistance, corrosion resistance and dielectric properties, especially its unique non-adhesive and self-lubricating properties, so that it is not only used in the chemical and electrical industries but also in the mechanical and electronic industries. broad attention. However, pure PTFE has the obvious disadvantages of poor wear resistance and poor creep resistance, which greatly limits its application range and effect. Modified PTFE is usually filled with micron-sized inorganic particles. However, the micron-sized particle-filled modified PTFE material still has certain limitations, such as increased friction coefficient and significantly reduced toughness, and hardness, creep resistance and wear resistance are closely related to the content of inorganic substa...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K3/36B29C43/00B29C43/52
Inventor 宁莉萍王齐华简令奇杨生荣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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