Improving the mechanical properties of zirconia in instrument bearings

V V Alisin,A V Kulebyakin,V A Myzina,N Yu Tabachkova,B A Diethelm,A Glezer,S Roshchupkin

doi:10.1051/matecconf/202032902023

V V Alisin, A V Kulebyakin + Show 5 more

Open Access

https://doi.org/10.1051/matecconf/202032902023

Copy DOI

Abstract

The article presents the issues of replacing leucosapphires in jeweled bearings of the axes of precision instruments with nanostructured crystals of partially stabilized zirconia. The statement is substantiated that doping with rare earth elements provides an improvement in the performance properties of precision instruments by improving the mechanical properties of bearing materials. The efficiency of doping of zirconia crystals with cerium and neodymium oxides is studied. It was found that doped crystals have increased plasticity, which provides an increase in the crack resistance of crystals. Special attention is paid to the issues of increasing the survivability of high-speed rotor bearings by replacing the thrust bearing of leucosapphire with nanostructured crystals of partially stabilized zirconia doped with cerium and neodymium. The efficiency of improving the mechanical properties is confirmed by the X-ray phase analysis of crystals. The phase composition is studied by Raman scattering and the lattice parameters are determined. The increased crack resistance of the thrust bearing is confirmed by tests performed using the kinetic microhardness method.

Highlights

Machines and instruments with high-speed vertical rotors are common in various industries
The article presents the issues of replacing leucosapphires in jeweled bearings of the axes of precision instruments with nanostructured crystals of partially stabilized zirconia
Special attention is paid to the issues of increasing the survivability of high-speed rotor bearings by replacing the thrust bearing of leucosapphire with nanostructured crystals of partially stabilized zirconia doped with cerium and neodymium

Summary

Introduction

Machines and instruments with high-speed vertical rotors are common in various industries. They are used in spinning devices of weaving machines, gyroscopic instruments, centrifugal separators for separating liquid and gaseous mixtures in the food and chemical industries. Studies of cellular and molecular biology are widely applies method of studying dispersed media in the mode of analyzing the elements of the dispersed phase by light scattering and fluorescence signals, based on the use of ultracentrifuges [1]. The reliability and service life of such machines depend on the tribological properties of the support bearing materials. Combinations of hard coatings [2] and various lubricants [3] are used to improve the tribological properties of rotor bearings. A comparison is made with the tribological properties of sapphire

Objectives

Methods

Conclusion