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207001

EFFECT OF DISPERSING LITHIUM GREASE BY CLAY PARTICLES

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Last updated: 25 Dec 2024

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Abstract

The present work aims to enhance the lubricating properties of lithium grease by the addition of clay particles as well as paraffin oil.  Bearing steel ball loaded and slid on aluminum (Al) sheet was used to test the friction and wear when the contact surfaces was greased by lithium grease dispersed by clay of 30 – 50 µm particles size.
 
Based on the present experiments, it was revealed that dispersing grease by clay particles and blending by paraffin oil decreased friction coefficient. Clay particles decreased the number of the contacting asperities of the two sliding surfaces and consequently friction coefficient decreased. Presence of oil decreased the agglomeration of clay particles, facilitated the rolling of the particles and retarded the sticking of the particles in one of the sliding surfaces. This behavior is attributed to the increased grease fluidity and decreased metallic contact of the sliding surfaces, where the particles were enabled to roll between the two sliding surfaces.
 
Enhancement of wear may be from the ability of particles to work as ball bearing that decreased the formation of the transferred layer form aluminum sheet and separated the two contact surfaces. Clay particles formed protective thin layer on the contact area and provided high carrying capacity and extreme pressure properties. Grease dispersed by 10 wt. % clay content and blended by 10 wt. % oil gave the best wear values.

DOI

10.21608/jest.2021.207001

Keywords

lithium grease, clay particles, paraffin oil

Authors

First Name

A. K.

Last Name

Ameer

MiddleName

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Affiliation

Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia, EGYPT.

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First Name

A. M.

Last Name

Samy

MiddleName

-

Affiliation

Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia, EGYPT.

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Orcid

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First Name

W. Y.

Last Name

Ali

MiddleName

-

Affiliation

Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia, EGYPT.

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-

City

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Orcid

-

First Name

K. M.

Last Name

Atia

MiddleName

-

Affiliation

Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia, EGYPT.

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Volume

18

Article Issue

4

Related Issue

29148

Issue Date

2021-10-01

Receive Date

2021-08-22

Publish Date

2021-10-01

Page Start

55

Page End

65

Print ISSN

2090-5882

Online ISSN

2090-5955

Article File

JEST_Volume 18_Issue 4_Pages 55-65.pdf

PDF . 673.0kB

Link

https://jest.journals.ekb.eg/article_207001.html

Detail API

https://jest.journals.ekb.eg/service?article_code=207001

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6

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Original Article

Type Code

1,211

Publication Type

Journal

Publication Title

Journal of the Egyptian Society of Tribology

Publication Link

https://jest.journals.ekb.eg/

MainTitle

EFFECT OF DISPERSING LITHIUM GREASE BY CLAY PARTICLES

Details

Type

Article

Created At

22 Jan 2023