Last edited by Brajar
Sunday, May 17, 2020 | History

2 edition of Rheological properties of lubricants with particular reference to greases. found in the catalog.

Rheological properties of lubricants with particular reference to greases.

Albert E. Yousif

Rheological properties of lubricants with particular reference to greases.

by Albert E. Yousif

  • 225 Want to read
  • 17 Currently reading

Published by University of Salford in Salford .
Written in English


Edition Notes

PhD thesis, Aeronautical and Mechanical Engineering.

SeriesD2808/72
ID Numbers
Open LibraryOL19685817M

Ionic liquid lubricants or lubricant additives have been studied intensively over past decades. However, ionic grease serving as lubricant has rarely been investigated so far. In this work, novel protic [triethanolamine][oleic acid] and aprotic [choline][oleic acid] ionic greases are successfully synthesized. These ionic greases can be directly used as lubricants without adding thickeners or Cited by: Welcome to the European Lubricating Grease Institute The ELGI was established in May and is an independent, self-governing institute, financed solely by members. It is one of a group of scientific and technical institutes active in the field of tribology dealing with lubricating greases .

Albert E. Yousif has written: 'Rheological properties of lubricants with particular reference to greases' Asked in Authors, Poets, and Playwrights What has the author A P Kakouris written? UBRICATING grease is usually made from petroleum oils thickened with metal soaps, lithium soap is the most widely used thickening agent. In addition, lubricating greases usually contain some performance additives. Thus, the use of polymers is a common practice to modify the rheological properties of greases by reinforcing the role ofFile Size: KB.

  Grease lubrication offers many advantages compared with oil lubrication, but selecting the right grease is complicated. Understanding the lubrication mechanisms will help in selecting the right grease with the right amount for a specific application to meet bearing life expectations. Measurements of lubricant shear rheological behavior in the amorphous solid region and near the liquid-solid transition are reported. Elastic, plastic and viscous behavior was observed. The maximum yield shear stress (limiting shear stress) is a function of temperature and pressure and is believed to be the property which.


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Rheological properties of lubricants with particular reference to greases by Albert E. Yousif Download PDF EPUB FB2

GREASES The American Society for Testing and Materials (ASTM) defined lubricating grease as a solid or semi-fluid lubricant consisting of a thickening agent in a liquid lubricant.

To improve certain properties and functions, additional components are sometimes included, called as additives, [5]. Lubricating greaseFile Size: KB. The rheological properties of greases are usually examined under steady state conditions at a relatively high shear stress using a capillary viscometer or under static conditions at very small shear stresses using a grease penetrom- by: Lubricants which display dependence on shear rate are known as non‐Newtonian or fluids with structural viscosity.

Apart from the structure‐viscosity and the permanent reduction in viscosity caused by shearing, lubricants are subject to rheological effects and in particular, colloidal systems consisting of solid or fluid by: 4.

At high shear rates the grease flows as a newtonian liquid but with a higher viscosity than that of its base oil. Sodium-base grease showed better temperature and shear stability than aluminium-base by:   In this study, a number of lubricants were assessed for their rheological properties, and qualitative correlation with sensory experience was made.

The lubricants contained various structurants including xanthan, hydroxyethyl cellulose, carboxymethyl cellulose and : Aaron S. Goh, Beng Sim Chuah, K. Nguyen. The rheological properties of the lipid-based lubricants precluded testing with the exception of explant safety testing. Six aqueous-based gels were hyperosmolar, two were nearly iso-osmolar, and.

Immediate online access to all issues from Subscription will auto renew by: 1. Physical and chemical analyses enable these modifications in rheological properties to be linked to variations in composition or structure, depending on the type of grease and bearing.

Several mechanisms involved in lubricating a bearing with a lubricating grease are confirmed or by: Lubricating Greases, Marine Lubricants, Industrial Lubricants, Refining of Petroleum, Lubricating Oils, Greases and Solid Lubricants, Refinery Products, Crude Distillation and Photographs of Machinery with Suppliers Contact Details.

This book will be a mile stone for its readers who are new to thisFile Size: 2MB. A Comprehensive Review of Lubricant Chemistry, Technology, Selection, and Design Syed Q.

Rizvi. Rheological Properties Automotive Lubricants Reference Handbook by Arthur Caines and Roger Haycock, published by SAE International, Size: 4MB.

Solid and Grease Lubricants Solid Lubricants Greases Physical and Chemical Properties of Engine Oils (SAE J) Useful Industry Websites Index About the Authors Automotive Lubricants Reference Book Second Edition.

Created Date: 9/6/ PM File Size: KB. The reference book contains brief information about the purpose, fields of use and normative quality indices of the lubricants produced by the Agrinol. The reference book can be used as a guide to choose and utilize the association’s production. For further information, please, visit our web-site: l.u a LLC “RU SIE Agrinol”File Size: 2MB.

Rheological properties of lubricants with particular reference to greases. Author: Yousif, A. ISNI: Awarding Body: University of Salford Current Institution: University of Salford Date of Award: Availability of Full Text.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Introduction to Rheology of Lubricating Grease Publication Chapter 1. Introduction L. Hamnelid difficult and the required lubricant properties more comprehensive.

lubricants in general and lubricating grease in particular are considered as low price products. The volumes required, often lasting for the whole lifetime of theFile Size: KB. Against the background of raw material shortage and the ever-expanding environmental consciousness, the use of biodegradable greases becomes more and more important.

The aim of this experimental work is to investigate the tribological response of completely biodegradable greases. Complete biodegradable lubricating greases were formulated with high-oleic sunflower oil (HOSO) and/or castor oil Cited by: 1.

Since lubrication is mainly a deformation and flow problem, the knowledge of the rheological properties of lubricating greases may contribute to elucidate one of the unresolved problems in tribology: the effect of viscoelasticity on lubrication characteristics and, consequently, the way in which a lubricating grease behaves under operating conditions.

Low Temperature Rheological Properties of Polymer Treated Lubricating Oils. By P. Slimming, I. Crail and P. Hattersley. Behaviour of Non-Newtonian Lubricants in Journal Bearings - A Author: Theo Mang.

Greases arecomposed by lubricating oil dispersed in a thickener that can be a metal soap,polymers or clays.

Grease production using vegetable oils is increasing due tobiodegradability requirements. Since vegetable oils present a worse oxidationand hydrolysis stability than mineral oils, it is usually difficult to producea neutral greaseusing by: 1. The effects that both soap concentration and base oil viscosity exert on the rheology of lubricating greases and its relationship with grease microstructure are discussed in this work.

With this aim, different lubricating grease formulations were manufactured by modifying the concentration of lithium hydroxystearate and the viscosity of the base oil, according to an RSM statistical by:.

References(6) Comprehensive interpretations of grease properties are presented. Dropping point, penetration and rheological properties are examined for a wide variety of greases involving both lithium soap greases and diurea greases. Types and viscosity of the base oils, types and content of the thickeners and manufacturing conditions are Cited by: 2.Petroleum, Lubricating Oils, Greases and Solid Lubricants, Refinery Products, Crude Distillation and Photographs of Machinery with Suppliers Contact Details.

This book will be a mile stone for its readers who are new to this sector, will also find useful for professionals.Greases and Solid Lubricants. GREASES. 1. Definition. For many years the ASTM defined grease as a “combination.

of a petroleum product and a soap or mixture of soaps with or. without fillers, suitable for certain lubrication applications.” Although this definition was generally accurate a few years ago.