Design and Simulation Analysis of Micro-Porous Structure in Infiltration-Type Self-Lubrication Composites Matrix

Han Ying,A.I Almerich-Chulia

doi:10.1051/matecconf/201824201012

Abstract

Metal ceramic preforms were fabricated by vacuum sintering method in this work. Ti–Fe–Cr–W–Mo–V powder was used as the basic material, TiH2 and CaCO3 were used as the composite pore-forming material and Al2O3 was used as dispersal particles. The microstructure and the worn surface morphology of the preforms and the composites were analyzed using scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The experimental results showed that when the micro-pore shapes are circular and quadrilateral respectively, with the increasing load, the Mises equivalent stress distribution generated by the single cell model is quite different, but it has symmetry, and the maximum stress appears around the interpenetrating micro-pore. Using FeCrWMoV alloy powder as the metal phase and TiC powder as the ceramic phase, the micro-porous matrix was prepared by powder metallurgy sintering with the addition of a certain volume fraction of compound pore-making agent.

Highlights

The new type of infiltration self-lubrication composites is prepared by using bionic tribology
The melt solid lubricant is immersed in the micro- pore matrix
It can be seen from the figure that different micro-pore structure models produce different degrees of deformation and different stress values, but the maximum stress appears around the interpenetrating micro-pore

Summary

Introduction

The new type of infiltration self-lubrication composites is prepared by using bionic tribology. The melt solid lubricant is immersed in the micro- pore matrix. Under the action of high temperature and friction heat, the solid lubricant is precipitated out to the friction interface along the micro-pore structure[1]. The material has good mechanical properties and selflubricating properties under special working conditions such as high temperature and high pressure, and is widely used in aerospace, electronic machinery and other industries. The main function of the micro-pore matrix is to bear the load, which affects the mechanical properties and various properties of composite materials[2,3]. How to control the micro-pore structure of the matrix, so that it can store enough lubricant to meet the requirements of lubrication performance[4], and at the same time, it has enough strength to meet the requirements of mechanical performance is the key of this paper

Methods

Results

Conclusion