Influence of Li Grease Thickener Types on Film Thicknesses Formed between Smooth and Dented Surfaces

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F17%3APU125982" target="_blank" >RIV/00216305:26210/17:PU125982 - isvavai.cz</a>

Result on the web

<a href="https://www.jstage.jst.go.jp/article/trol/12/5/12_262/_pdf/-char/en" target="_blank" >https://www.jstage.jst.go.jp/article/trol/12/5/12_262/_pdf/-char/en</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2474/trol.12.262" target="_blank" >10.2474/trol.12.262</a>

Result language

angličtina

Original language name

Influence of Li Grease Thickener Types on Film Thicknesses Formed between Smooth and Dented Surfaces

Original language description

The lubricant film thickness behaviors of lithium (Li) thickener type greases and their base oil were investigated for the contact between a glass disk and a smooth/dented steel ball using an optical interferometry. The main focus is to understand grease film behaviors including high speed history and contact surface conditions. A Li stearate thickened grease showed similar behaviors to the base oil itself and the thickener particles were not observed on the contact. Thickener particle entrainments were observed in greases with Li 12-hydroxy stearate and Li complex thickeners. Track patterns formed in the downstream of the contacts correlated with the thickener particle entrainments to the contacts. The Li stearate thickened grease showed quick starvation phenomenon without a scoop which maintains fully flooded conditions. The particle entrainments of Li 12-hydroxy stearate and Li complex thickened greases were less observed after measurements at high speeds. On the dented surfaces, the particle entrainments of the Li 12-hydroxy stearate grease were more frequent than those of Li complex grease. These results suggest that thickener chemical structures have influence on the grease film formation. The thickener with higher polarity could promote the entrainment of greases into contact.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20301 - Mechanical engineering

Project

<a href="/en/project/GA17-23235S" target="_blank" >GA17-23235S: Effect of thermal properties of contacting bodies on lubricant flow in Hertzian non-smooth contacts</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Tribology Online

ISSN

1881-2198

e-ISSN

—

Volume of the periodical

12

Issue of the periodical within the volume

5

Country of publishing house

JP - JAPAN

Number of pages

12

Pages from-to

262-273

UT code for WoS article

000583227700002

EID of the result in the Scopus database

2-s2.0-85041035514