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Titolo:
Evaluation of high viscosity of solidified lubricants at high pressure by Rayleigh light scattering and photon correlation technique
Autore:
Nakamura, Y; Tsunoda, M; Matsui, T; Fujishiro, I;
Indirizzi:
Mie Univ, Fac Engn, Tsu, Mie 5148507, Japan Mie Univ Tsu Mie Japan 5148507 ie Univ, Fac Engn, Tsu, Mie 5148507, Japan Mie Univ, Grad Sch, Tsu, Mie 5148507, Japan Mie Univ Tsu Mie Japan 5148507 ie Univ, Grad Sch, Tsu, Mie 5148507, Japan
Titolo Testata:
JSME INTERNATIONAL JOURNAL SERIES C-MECHANICAL SYSTEMS MACHINE ELEMENTS AND MANUFACTURING
fascicolo: 1, volume: 44, anno: 2001,
pagine: 237 - 243
SICI:
1344-7653(200103)44:1<237:EOHVOS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATURE; OILS;
Keywords:
tribology; lubrication; viscosity; spectroscopic measurement; laser; high pressure; photon correlation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Nakamura, Y Mie Univ, Fac Engn, 1515 Kamihama Cho, Tsu, Mie 5148507, JapanMie Univ 1515 Kamihama Cho Tsu Mie Japan 5148507 148507, Japan
Citazione:
Y. Nakamura et al., "Evaluation of high viscosity of solidified lubricants at high pressure by Rayleigh light scattering and photon correlation technique", JSME C, 44(1), 2001, pp. 237-243

Abstract

A new viscosity measuring system was designed and set up employing Rayleigh light scattering and the photon correlation technique in which a high-pressure diamond-anvil cell (DAC) was used. Two kinds of experiments were conducted. One was the measurement of a dilute suspension of polystyrene latex spheres in liquid lubricant and W/O emulsion. Correlation functions inducedby the Brownian motion of fine spheres in the lubricant were observed and the viscosities were obtained, the measurement time of which was one-tenth shorter than that of the falling-body method. The other experiment was the measurement of 5P4E (polyphenyl ether) and DOP (dioctylphthalate) without mixing polystyrene spheres. Very weak but observable correlation functions related to structural relaxation were observed and the viscosities of solidified lubricants (about 10(9) Pa.s), obtained in a very short time by introducing a shift factor for relaxation time, were consistent with those extrapolated from data obtained using the falling-body method.

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Documento generato il 02/04/20 alle ore 00:23:53