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TECHNICAL PAPERS

Mechanism of Action of Colloidal Solid Dispersions

[+] Author and Article Information
F. Chiñas-Castillo

Instituto Tecnologico de Oaxaca, Wilfrido Massieu s/n, Oaxaca, Oax., México

H. A. Spikes

Mechanical Engineering Department, Tribology Section, Imperial College, London, SW7 2BX, U.K.

J. Tribol 125(3), 552-557 (Jun 19, 2003) (6 pages) doi:10.1115/1.1537752 History: Received February 26, 2002; Revised August 06, 2002; Online June 19, 2003
Copyright © 2003 by ASME
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References

Palios, S., Cann, P. M., and Spikes, H. A., 1996, “Behavior of PTFE Suspensions in Rolling/Sliding Contacts,” Proc. 22th Leeds-Lyon Symp., D. Dowson et al., eds. Elsevier.
Cusano,  C., and Sliney,  H. E., 1981, “Dynamics of Solid Dispersions in Oil During The Lubrication of Point Contacts, Part 1-Graphite,” ASLE Trans., 25, pp. 183–189.
Wan, G. T. Y., and Spikes, H. A., 1986. “Two Phase Lubricants in Elastohydrodynamic Contacts-Graphite in Oil Dispersions,” Proc. 12th Leeds-Lyon Symp., D. Dowson et al., eds. Publ. Butterworths.
Wan,  G. T. Y., and Spikes,  H. A., 1988, “The Behavior of Suspended Solid Particles in Rolling and Sliding EHL Contacts,” STLE Trans., 31, pp. 12–21.
Reick,  F. G., 1982, “Energy-Saving Lubricants Containing Colloidal PTFE,” Lubr. Eng., 38, pp. 635–646.
Mishina,  H., Kohno,  A., Kanekama,  U., Nakajama,  K., Mori,  M., and Iwase,  M., 1993, “Lubricity of the Metallic Ultrafine Particles,” Jap. Journ. of Trib., 38, pp. 1109–1120.
Xue,  Q., Liu,  W., and Zhang,  Z., 1997, “Friction and Wear Properties of a Surface Modified TiO2 Nanoparticle as an Additive in Liquid Paraffin,” Wear, 213, pp. 29–32.
Dong,  J. X., Chen,  G., and Qiu,  S., 2000, “Wear and Friction Behavior of CaCO3 Nanoparticles Used as Additives in Lubricating Oils,” Lubr. Sci., 12, pp. 205–212.
Chiñas-Castillo,  F., and Spikes,  H. A., 2000, “The Behavior of Colloidal Solid Particles in Lubricated Contacts,” Tribol. Trans., 43, pp. 387–394.
Chiñas-Castillo, F., and Spikes, H. A., 2000, “Behavior of Colloidally-Dispersed Solid Particles in Very Thin Film Lubricated Contacts,” Proc. 26th Leeds-Lyon Symp. on Tribology. D. Dowson et al., eds. Elsevier.
Leff,  D. V., Brandt,  L., and Heath,  J. R., 1996, “Synthesis and Characterization of Hydrophobic Organically-Soluble Gold Nanocrystals Functionalized with Primary Amines,” Langmuir, 12, pp. 4723–4730.
Johnston,  G. J., Wayte,  R., and Spikes,  H. A., 1991, “The Measurement and Study of Very Thin Lubricant Films in Concentrated Contacts,” Tribol. Trans., 34, pp. 187–194.
Ratoi,  M., Anghel,  V., Bovington,  C., and Spikes,  H. A., 2000, “Mechanism of Oiliness Additives,” Tribol. Int., 33, pp. 241–247.
Chiñas-Castillo,  F., and Spikes,  H. A., 2000, “Film Formation by Colloidal Overbased Detergents in Lubricated Contacts,” Tribol. Trans., 43, pp. 357–366.
Hamrock, B. J., 1994, Fundamentals of Fluid Film Lubrication, McGraw-Hill, N.Y.
Tipei,  N., 1968, “Boundary Conditions of a Viscous Flow Between Surfaces With Rolling and Sliding Motion,” ASME J. Lubr. Technol., Series F, 90, pp. 254–261.
Cameron, A., 1981, Basic Lubrication Theory, Ellis Horwood Ltd., Chichester, U.K.
Segre,  G., and Silberberg,  A., 1961, “Radial Particle Displacements in Poiseuille Flow of Suspensions,” Nature (London), 189, pp. 209–210.
Ho,  B. P., and Leal,  L. G., 1974, “Inertial Migration of Rigid Spheres in Two-Dimensional Unidirectional Flows,” J. Fluid Mech., 65, pp. 365–400.

Figures

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Film thickness results for silver colloid in n-hexadecane, SRR effect, 25°C
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MTM friction results for silver colloid in n-hexadecane, 50 percent SRR, 30°C
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Film thickness results for gold colloid in n-hexadecane, SRR effect, 25°C
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MTM friction results for gold colloid in n-hexadecane at 30°C, 50 percnet SRR and 30 percent SRR
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Effect of temperature on gold colloid performance at 50 percent SRR
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Film thickness results for gold colloid in hexadecane at 25°C SRR effect
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Flow pattern of an EHD contact
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Flow pattern in EHD point contact pure rolling
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Forces acting on a particle in a pure rolling contact
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Typical behavior of colloidal particles with varying slide-roll ratio
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Flow pattern in EHD point contact pure sliding
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Forces acting on a particle in a pure sliding contact

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