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Preparation method of Ni-Al based low friction and abrasion resistant composite material

A composite material and low-friction technology, applied in the field of high-temperature lubricating materials, can solve the problems of complex composition and process, and achieve good lubricating performance in a wide temperature range, improved high-temperature self-lubricating range, and good lubricating performance in a wide temperature range

Inactive Publication Date: 2016-06-29
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

However, the high-temperature self-lubricating wear-resistant material prepared by this patented method is not only complicated in composition and process, but also has a friction coefficient of 0.22-0.29 and a wear rate of 8.5-20 (10 -14 m 3 ·N -1 m -1 ), which is still relatively large compared to the higher and higher requirements for high-temperature self-lubricating and wear-resistant materials in the high-tech field

Method used

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  • Preparation method of Ni-Al based low friction and abrasion resistant composite material
  • Preparation method of Ni-Al based low friction and abrasion resistant composite material

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Embodiment 1

[0022] The components and their mass percentages of Ni-Al-based wide temperature range high temperature low friction and antiwear composites are: Ni: 58.2%, Al: 26.8%, Ag 3 VO 4 : 15%. First, the nickel and aluminum powders with a purity greater than 99.0% were mixed according to the mass ratio of Ni: 58.2% and Al: 26.8% (Ni-50at.%Al at this time), and the above mixture was placed in a four-tank planetary high-energy ball mill (FRITSCH, Germany) The wet ball milling process is used for ball milling. The ball milling time is 70h, the speed is 250r / min, and the ball-to-material ratio is 10:1. Then silver vanadate (Ag 3 VO 4 ) powder by Ag 3 VO 4 : 15% mass ratio is added to the above-mentioned mixture, and then the above-mentioned mixture is ball-milled by the above-mentioned wet ball milling process for 5 hours, and after drying, the mixed powder is obtained. Weigh the above mixed powder and put it into a graphite mold for cold-pressing pre-forming, the pre-forming pressu...

Embodiment 2

[0024] The components and their mass percentages of the Ni-Al-based wide temperature range high temperature, low friction and wear resistant composites are: Ni: 61.7%, Al: 28.3%, Ag 3 VO 4 : 10%. First, the nickel and aluminum powders with a purity greater than 99.0% were mixed according to the mass ratio of Ni: 61.7%, Al: 28.3% (Ni-50at.%Al at this time), and the above mixture was placed in a four-tank planetary high-energy ball mill (FRITSCH, Germany) The wet ball milling process is used for ball milling. The ball milling time is 70h, the speed is 250r / min, and the ball-to-material ratio is 10:1. Then silver vanadate (Ag 3 VO 4 ) powder by Ag 3 VO4 : 10% mass ratio is added to the above-mentioned mixture, and then the above-mentioned mixture is ball-milled by the above-mentioned wet ball milling process for 5 hours, and after drying, the mixed powder is obtained. Weigh the above mixed powder and put it into a graphite mold for cold-pressing pre-forming, the pre-forming ...

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Abstract

The invention discloses a preparation method of an Ni-Al based wide-temperature range high temperature low friction and abrasion resistant composite material. According to the invention, silver vanadate is added into Ni-Al alloy with good mechanical and high temperature resistant performance, a low temperature lubricating phase AG can be resolved from silver vanadate in a preparation process of the composite material, and during high temperature friction, a high temperature lubricating phase Ag3VO4 is regenerated on the surface, thus realizing wide-temperature range continuous lubrication function. The composite material has continuous and stable lubricating function in a temperature range from room temperature to 900DEG C, and has the characteristics of low friction and low abrasion at a high temperature stage (700-900DEG C), and can be used for solving the problems of lubrication and abrasion resistance between related sliding parts under wide-temperature range, special medium, high speed and other working conditions in high and new technology industries.

Description

technical field [0001] The invention belongs to the field of high-temperature lubricating materials, in particular to a preparation method of a Ni-Al-based composite material with a wide temperature range, high temperature, low friction and wear resistance. Background technique [0002] Extremely harsh working conditions such as wide temperature range (especially high temperature), special media and high speed are common in modern high-tech industries such as aviation, aerospace, nuclear technology and electric power. The lubrication and wear resistance of related sliding parts has become a problem that affects the reliability of the entire system Therefore, there is an increasingly urgent need for new lubricating materials with continuous lubrication function in a wide temperature range. Nickel-based superalloys are widely used in high-temperature structural parts in aviation, aerospace and other fields due to their high strength and good oxidation resistance in the range o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C19/03B22F3/16
Inventor 陕钰贾均红刘二勇易戈文王文珍
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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