Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof

A technology of porous metal foam and solid lubricating material, applied in the field of materials, can solve the problems of limiting the longitudinal thickness of plastics and reducing the wear resistance life, and achieves improved thermal conductivity, good thermal conductivity, improved expansion force and inherent cold flow. Effect

Active Publication Date: 2010-12-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF7 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these two patents, the bonding or reinforcement of the bronze powder in the middle layer and the metal mesh or non-metal mesh of the reinforcing layer to the polymer lubricating layer on the upper surface is only limited to the interlayer contact part, which greatly limits the use of Longitudinal thickness of the plastic that lubricates the body, resulting in a considerable reduction in wear life

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof
  • Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof
  • Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Metal foam: a copper foam, characteristic parameters: average pore diameter 0.96mm, PPI (pores per inch) 28, porosity 93%, density 0.62 g / cm 3 , Compressive strength 1.76MPa.

[0013] The weight percentage of each component of the solid lubricant: polytetrafluoroethylene 80%, graphite 20%.

[0014] The manufacturing process of the composite material is as follows: firstly, the mixed components of the solid lubricant are dispersed in volatile anhydrous ethanol to form a suspension by ultrasonication, and then the solid lubricant is dripped and filled into the foam with the aid of a vacuum pump with the help of a vacuum pump. The inside of the metal, then air-dried for 2 hours to remove the organic solvent, cold-pressed at 60MPa for 5 minutes to maintain the compactness of the entire system, and finally sintered in a sintering furnace for 120 hours between 330°C and 370°C min, cooling and forming.

[0015] The above-prepared copper foam-based composite with a density of...

Embodiment 2

[0020] The weight percentage of each component of the solid lubricant: polytetrafluoroethylene 70%, graphite 30%. The metal foam used and the method of making and testing are the same as in Example 1.

[0021] The copper foam-based composite material prepared in this example has a density of 3.21 g / cm 3 , Shore hardness 64 degrees, thermal diffusivity at 25°C 2.01mm 2 / s, resistivity 5.8×10 -5 Ωm. Some of its tribological properties are shown in Table 2; at the end of the friction stage, a digital thermometer was used to measure the friction temperature of the composite material on the approaching friction surface. The homogeneous polymer was 148°C.

[0022] Table 2. Comparison of tribological properties of different types of composite materials (500N, V=0.856m / s)

[0023] sample

Embodiment 3

[0025] Metal foam: a copper foam, characteristic parameters: average pore diameter 1.50mm, PPI (pores per inch) 18, porosity 96%, density 0.35 g / cm 3 , Compressive strength 0.52MPa.

[0026] The solid lubricant chooses pure polytetrafluoroethylene (PTFE) as a single filler. Concrete production and test method are the same as embodiment 1.

[0027] The composite material based on foamed copper prepared in this example has a density of 2.46 g / cm 3 , Shore hardness 61 degrees, thermal diffusivity at 25°C 1.00mm 2 / s, resistivity 1.5×10 -4 Ωm. Some of its tribological properties are shown in Table 3, and the pure PTFE sample will fail after 30 minutes of grinding.

[0028] Table 3. Comparison of tribological properties of different types of composite materials (500N, V=0.424m / s)

[0029] sample

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Average pore sizeaaaaaaaaaa
Densityaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a porous foam metal based embedded type solid self-lubricating composite material which is formed by filling solid lubricating materials into the porous foam metal. In the designing and manufacturing method of the self-lubricating composite material, the porous foam metal is used as a base body framework and a solid lubricating material component vacuum titrating method is adopted; and the manufacturing method comprises the following steps of: filling a solid lubricant into the porous foam metal framework by using an organic suspension; carrying out air drying, and then sintering through cold pressure; and finally forming; or pressing melted resin with better flowability and used as the mixed solid lubricating material into the porous foam metal under pressure slightly lower than the pressure-resistant strength of the porous foam metal, and then naturally cooling for forming. shown by practices, the embedded type solid self-lubricating composite material designed and manufactured according to the design idea not only has light weight of the porous foam metal, high specific surface area and good heat conductivity and electrical conductivity, but also has good lubricating property of the solid lubricant, and overcomes the limit of low pressure-resistant capability of the porous foam metal in the filling process so that the self-lubricating composite material has high effective lubricating area proportion, better heat conductivity and electrical conductivity and enhanced pressure-resistant capability and effectively inhibits the expansibility of a straight polymer when the straight polymer is heated and the inherent cold flow property of the straight polymer, thereby improving the abrasion-reducing property and the abrasion-resisting property of the solid lubricating materials especially under the working conditions of high-speed heavy loads on one hand.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a self-lubricating and space lubricating material. Background technique [0002] With the development of industrial technology, especially the application requirements of space technology, self-lubricating materials are more and more widely used in harsh working environments where lubricating oil and grease cannot do it. For example, the research method of introducing self-lubricating materials into the bearing system saves additional maintenance of lubricating materials within a certain life. A class of solid lubricating materials represented by polytetrafluoroethylene (PTFE) has been widely used in the design of self-lubricating structures, and pure PTFE is mostly used as a lubricant matrix due to its defects in wear resistance. , Auxiliary addition of micron or nanoscale inorganic particles or fibers to enhance its wear resistance. However, in high-speed and heavy-load env...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C1/08
Inventor 戴振东夏延秋姬科举
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com