Effects of Graphite Additive Ratio and Temperature on Rheological Properties of Magnetorheological Grease

To investigate the effect of graphite additive specific gravity on the rheological properties of magnetorheological grease (MRG), graphite magnetorheological grease (GMRG) with 70% mass fraction of carbonyl iron powder and 0%, 2%, 5%, 8%, and 10% mass fractions of graphite powders were prepared usin...

Full description

Saved in:
Bibliographic Details
Published in:JOM (1989) 2024-02, Vol.76 (2), p.911-918
Main Authors: Dong, Ji-Qiang, Ye, Xu-Dan, Mao, Run-Song, Wang, Hui-xing, Wang, Jiong
Format: Article
Language:English
Subjects:
Additives
Carbonyl powders
Density
Fractions
Frequency scanning
Graphite
Greases
Kinematics
Magnetic fields
Magnetic properties
Mechanical properties
Rheological properties
Rheology
Shear strain
Shear stress
Specific gravity
Temperature
Viscoelasticity
Viscosity
Yield stress
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To investigate the effect of graphite additive specific gravity on the rheological properties of magnetorheological grease (MRG), graphite magnetorheological grease (GMRG) with 70% mass fraction of carbonyl iron powder and 0%, 2%, 5%, 8%, and 10% mass fractions of graphite powders were prepared using grease as the matrix. An Anton Paar rheometer was used to measure the rheological characteristics of five materials in oscillatory and steady-state shear modes. The results reveal that the incorporation of graphite powder into MRG yields superior yield stresses. In addition, the graphite additive could enhance the viscoelastic characteristics of the MRG and had little effect on the linear viscoelastic interval of the material. Frequency scanning experiments of temperature changes indicate that GMRG is a temperature-hardened material, and that the temperature stability of GMRG viscosity at different frequencies is better, but GMRG exhibits more elasticity than viscosity. However, it is significant to highlight that the presence of graphite reduces the relative magnetorheological action of the MRG.
ISSN:1047-4838
DOI:10.1007/sll837-023-06322-3