Open AccessThe Investigation on Rheology and Microstructure for Lithium Complex Grease
Author(s) -
Jingjing Mao,
Jianming Li,
Qiu Jian-wei,
Lijun Liu,
Yue Wang,
Zhang Lijiuan
Publication year - 2019
Publication title -
energy and earth science
Language(s) - English
Resource type - Journals
eISSN - 2578-1367
pISSN - 2578-1359
DOI - 10.22158/ees.v2n2p54
Subject(s) - grease , rheology , materials science , microstructure , lithium (medication) , composite material , fiber , shear rate , viscosity , medicine , endocrinology
The rheological characteristic parameters of five lithium complex lubricating greases were determined. The comparison of rheological characteristic parameters and microstructure of the five greases was made. The results showed that the knowledge of the rheological properties of lubricating greases may contribute to reflect the change of the thickener structure. The flow transition index characterized the breaking behavior of inner structure of grease, the greater this index, the better that soap fiber structure of grease; The damping factor was shifted from a medium range towards a lower value which resulted in brittle character of sample. At a constant shear rate, the soap fiber structure of complex lithium grease is dense and uniform, apparent viscosity decline rate is small. In this sense, it is relevant to understand how the development of the soap fiber structures in the grease contributes to several functional and rheological properties of lubricating greases.