Oxide ceramics/ alkaline earth metal chromate nano composite material and preparation method thereof

Abstract

The invention discloses oxide ceramics / alkaline earth metal chromate nano composite material and preparation method thereof, relating to nano composite material and preparation method thereof. The invention solves the problems of big frictional factor and high abrasion rate of the conventional oxide ceramics in the wide temperature range from room temperature to 800 DEG C and the problem of limited use condition of the solid lubricant used in the conventional preparation process of oxide ceramics. The nano composite material is prepared from nano oxide ceramics and nano alkaline earth metal chromate and the preparation method is as follows: 1. preparing powder mixture through ball milling; 2. conducting cold-pressing treatment to the powder mixture; and 3. sintering and cooling the mixture to room temperature along with the furnace. In this way, oxide ceramics / alkaline earth metal chromate nano composite material can be prepared. The oxide ceramics / alkaline earth metal chromate nano composite material prepared through the method has small frictional factor and low abrasion rate within the wide temperature range from room temperature to 800 DEG C and the nano oxide ceramics used in the process is free from using limitations.

Description

technical field [0001] The invention relates to a nanocomposite material and a preparation method thereof. Background technique [0002] Oxide ceramics (partially stabilized zirconia and alumina-reinforced zirconia, alumina, zirconia-toughened alumina ceramics, etc.) are traditional structural ceramics with high hardness, high strength, room temperature wear resistance, high stiffness, and excellent chemical properties. Stability and other advantages, its application in the industrial field can improve structural efficiency, reduce the structural weight of structural materials, improve the service reliability of structural materials and prolong the service life of structural materials. extremely important role. The friction coefficient of existing oxide ceramics at room temperature is between 0.4 and 0.6, and the wear rate is 10 -5 mm 3 / N·m order of magnitude, and at 800°C, the friction coefficient is as high as 1.0-1.2, and the wear rate is 10 -4 -10 -3 mm 3 / N·m ord...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of large friction coefficient and high wear rate in the wide temperature range from room temperature to 800°C in the existing oxide ceramics and the limited use conditions of the solid lubricant used in the production of oxide ceramics, the present invention provides A kind of oxide ceramic / alkaline earth metal chromate nanocomposite material and preparation method thereof

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