High temperature lubricating composite material containing strontium zirconate and preparation method thereof

Abstract

The invention relates to a high temperature lubricating composite material containing strontium zirconate and a preparation method thereof. The material is characterized by comprising the following components, by mass percentage: 49.28-54.32% of nickel, 12.32-13.58% of chromium, 26.4-29.1% of nanometer yttria-stabilized zirconia, and 3-12% of strontium sulfate. The preparation method comprises the following steps of: mixing the powder of the abovementioned components by adopting a dry process ball-milling technology, performing cold pressing performing on the mixed powder in graphite dies, performing hot pressure sintering on the preformed material in a vacuum hot-pressing sintering furnace, and preparing the high temperature lubricating composite material containing strontium zirconate based on solid-phase reactions. The material disclosed by the invention achieves excellent tribological properties in the temperature range of 800-1000 degrees centigrade; the preparation method is simple, can control the technological parameters in the preparation process easily; the invention can be used for solving the problems of high temperature lubrication of the related moving components of airspace engines, gas engines and petroleum drilling machines.

Description

technical field [0001] The invention belongs to the field of high-temperature lubricating materials, and relates to a high-temperature lubricating composite material containing strontium zirconate. The invention also relates to a method for preparing the high-temperature lubricating composite material based on solid-state reaction, and is especially suitable for solving related motions in the range of 800-1000°C Lubrication problems of components. Background technique [0002] As the aerospace, petroleum industry, nuclear technology and other fields require materials to work in harsh environments such as high temperature, high speed, and heavy loads, the requirements for the use of lubricating materials for key moving parts are becoming more and more stringent. For example, in high-speed operation The frictional heat generated during the process makes the surface temperature of the material as high as 1280°C, which means that the lubricating material is required to have a co...

AI Technical Summary

Problems solved by technology

However, the mismatch of wettability between the solid lubricant and the cermet matrix phase not only destroys the continuity of the cermet matrix phase, but also reduces the strength and wear resistance of the sintered composite, for example, at higher sintering temperatures, Some solid lubricants (such as MoS 2 , W 2 ) will decompose and will severely damage the lubricating properties of the sintered composite

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