Unlock instant, AI-driven research and patent intelligence for your innovation.

A composite material containing strontium aluminate and its preparation method and application

A composite material, strontium aluminate technology, applied in the field of lubricating materials, can solve the problems of large wear, high wear rate, poor tribological performance, etc., and achieve the effect of improving tribological performance

Active Publication Date: 2019-11-01
XI'AN PETROLEUM UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Self-lubricating alloys have a low coefficient of friction at high temperatures, however their wear rates are relatively high
Aiming at the problem of high wear of self-lubricating alloys at high temperatures, high-temperature lubricating composite materials compounded with solid lubricants have been researched and developed, but there are still problems with poor tribological properties

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
  • A composite material containing strontium aluminate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The present invention also provides a method for preparing a composite material containing strontium aluminate described in the above technical solution, comprising the following steps:

[0026] (1) nickel, chromium, nano-alumina and strontium carbonate are mixed to obtain a mixture;

[0027] (2) The mixture obtained in the step (1) is sequentially molded, sintered and cooled to obtain the composite material containing strontium aluminate.

[0028] The invention mixes nickel, chromium, nano-alumina and strontium carbonate to obtain a mixture. In the embodiment of the present invention, nickel and chromium are preferably mixed to obtain a metal element mixture, and nano-alumina and strontium carbonate are mixed to obtain a metal compound mixture; then the metal element mixture and the metal compound mixture are finally mixed Get the mix. The present invention has no special limitation on the mixing method, and a mixing method well known to those skilled in the art can ...

Embodiment 1

[0042] A composite material containing strontium aluminate, made of raw materials including the following mass percentages, Ni: 53.76%, Cr: 13.44%, nano-Al 2 o 3 : 28.8%, SrCO 3 : 4%; the chemical formula of the strontium aluminate is SrAl 4 o 7 The purity of the nickel, chromium and nano-alumina is greater than 99.0%; the nano-Al 2 o 3 The particle size is 20nm.

[0043] The preparation method is:

[0044] (1) Mix Ni and Cr powders on a planetary high-energy ball mill by wet ball milling to obtain a simple metal mixture. The ball milling time is 10 hours, the speed is 350r / min, and the ball-to-material ratio is 5:1; the nano-Al 2 o 3 and SrCO 3 The powder is mixed by wet ball milling on a planetary high-energy ball mill to obtain a metal compound mixture. The ball milling time is 10 hours, the rotation speed is 350r / min, and the ball-to-material ratio is 5:1; the metal element mixture and the metal compound mixture are finally mixed to obtain a mixture; In the final ...

Embodiment 2

[0052] A composite material containing strontium aluminate, made of raw materials including the following mass percentages, Ni: 51.52%, Cr: 12.88%, nano-Al 2 o 3 : 27.6%, SrCO 3 : 8%; the chemical formula of the strontium aluminate is SrAl 4 o 7 The purity of the nickel, chromium and nano-alumina is greater than 99.0%; the nano-Al 2 o 3 The particle size is 30nm.

[0053] The preparation method is:

[0054] (1) Mix Ni and Cr powders on a planetary high-energy ball mill by wet ball milling to obtain a simple metal mixture. The ball milling time is 15 hours, the rotation speed is 300r / min, and the ball-to-material ratio is 10:1; the nano-Al 2 o 3 and SrCO 3 The powder is mixed by wet ball milling on a planetary high-energy ball mill to obtain a metal compound mixture. The ball milling time is 15 hours, the rotation speed is 300r / min, and the ball-to-material ratio is 10:1; the metal element mixture and the metal compound mixture are finally mixed to obtain a mixture; In...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
friction coefficientaaaaaaaaaa
Login to View More

Abstract

The invention provides a strontium meta-aluminate containing composite material, and belongs to the field of lubricating materials. The strontium meta-aluminate containing composite material is prepared through the following raw materials in percentage by mass: 44.8-53.76% of nickel, 11.2-13.44% of chromium, 24-28.8% of nanometer aluminum oxide, and 4-20% of strontium carbonate, wherein the chemical formula of the strontium meta-aluminate is SrAl4O7; the sintering is performed under the temperature of 1100 DEG C. The composite material contains SrAl4O7, so that the tribology performance of thecomposite material in intermediate and high temperature interval can be greatly improved, and particularly the frictional coefficient of the composite material is less than 0.17 under the temperatureof 800 DEG C; the strontium meta-aluminate containing composite material has a good application prospect in high-temperature and high-speed moving parts in high-technology fields such as the fields of aerospace, nuclear engineering and military equipment.

Description

technical field [0001] The invention relates to the technical field of lubricating materials, in particular to a composite material containing strontium aluminate and a preparation method and application thereof. Background technique [0002] Mechanical moving parts in high-tech fields such as aerospace, nuclear engineering, and military equipment manufacturing face harsh working conditions such as high speed, high temperature, and heavy loads, which require lubricating materials to have continuous, stable friction coefficients and reliable wear resistance under variable temperature conditions. High strength, anti-oxidation, anti-corrosion and other properties. Since the traditional lubrication technology is difficult to meet the above requirements, solid lubrication technology must be used to solve the lubrication problem under special working conditions. However, solid lubrication is a self-consumption type of lubrication, which changes with the change of the ambient atmos...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C30/00C22C32/00C22C1/05C22C1/10
CPCC22C1/058C22C19/058C22C30/00C22C32/001
Inventor 刘峰柳红豆刘艳明冯乐张骁勇
Owner XI'AN PETROLEUM UNIVERSITY