4 October 1995 Correlation of acoustic distribution of the relaxation times and anti-wear properties of lubricant liquids
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Proceedings Volume 2643, Acousto-Optics and Applications II; (1995); doi: 10.1117/12.222772
Event: Acousto-Optics and Applications VI, 1995, Gdansk-Jurata, Poland
Abstract
Extensive measurements of the velocity C and absorption coefficient (alpha) of the longitudinal waves have been made at temperatures in the range 243 to 363 K and frequency from 10 to 90 MHz in five samples of mineral oils with a different percentage concentration of nonwear additive MKPh-18Y: MG-8A, containing 0.3% additive; MG-8A, containing 2% additive; I- 20; I-20, containing 1% additive. The tribologic properties (anti-friction and anti-wear) these samples have been studied on a four-ball pilot friction unit. The adding the anti-wear additive have changed the viscoelastic properties of mineral oil essentially. The generalized estimation of the influence of the additive on lubricant property showed that the samples with greater values of bulk viscosity and width of relaxation times distribution had the better anti-wear characteristic, but worse anti-friction properties.
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V. M. Troitskiy, "Correlation of acoustic distribution of the relaxation times and anti-wear properties of lubricant liquids", Proc. SPIE 2643, Acousto-Optics and Applications II, (4 October 1995); doi: 10.1117/12.222772; http://dx.doi.org/10.1117/12.222772
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KEYWORDS
Acoustics

Liquids

Minerals

Absorption

Temperature metrology

Ultrasonics

Velocity measurements

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