The present work focuses on the investigation of the influence of bulk ceramic materials on the behavior of elastohydrodynamically (EHD) lubricated line contacts. The materials alumina Al2O3, zirconium oxide ZrO2 and aluminum nitride (AIN) are used. Comparative measurements were taken with steel disks made of 42CrMo4. Of primary importance are the material parameters Young’s modulus and thermal conductivity. The experimental variables pressure, temperature and oil film thickness in the EHD contact of a two disk test rig were measured with the aid of evaporated thin film sensors. As the results show, an increase in the Young’s modulus causes a clear increase of the pressure level. The oil film thickness distributions show a decline of the flattening width and of the constriction occurring at the contact outlet. The influence of the material with respect to its thermal conductivity dominates, above all, in the region of the load transmitting contact zone. The transition from a good to a bad conductor of heat causes a rise in temperature, more prominent for materials with lower thermal conductivities. This leads to viscosity decrease causing clearly reduced oil film thicknesses in the contact. [S0742-4787(00)01404-1]

1.
Faul, W., 1991, “Entwicklung neuer Werkstoffe in Deutschland,” GIT Fachz. Lab., No. 9, pp. 993–1000.
2.
Ratzel
,
W.-I.
,
1990
, “
Keramische Werkstoffe
,”
Chem.-Ing.-Tech.
,
62
, No.
2
, pp.
86
91
.
3.
Dowson, D., and Higginson, G. R., 1977, Elasto-Hydrodynamic Lubrication, SI edition, Pergamon Press, Oxford, New York, Toronto, Sydney, Paris, Frankfurt.
4.
Schouten, M. J. W., 1973, “Einfluß elastohydrodynamischer Schmierung auf Reibung, Verschleiß und Lebensdauer von Getrieben,” Diss. TH Eindhoven.
5.
Jacobsen, B. O., 1991, “Rheology and Elastohydrodynamic Lubrication,” Tribology Series, 19, Elsevier Science Publishers B.V., Amsterdam, Oxford, New York, Tokyo.
6.
Baumann, H., 1985, “Druck-und Temperaturmessungen mittels aufgedampfter Du¨nn-schichtaufnehmer in einem elastohydrodynamischen Linienkontakt,” Diss. Universita¨t Karlsruhe (TH).
7.
Knauss, C., 1994, “Keramische Werkstoffe under elastohydrodynamischen Bedingungen,” Diss. Universita¨t Karlsruhe (TH).
8.
Sperrfechter, T., 1998, “Keramische Bauteile in elastohydrodynamischen Kontakt,” Diss. Universita¨t Karlsruhe (TH).
9.
Schilling, M. und Ege, 1976, “Referenzo¨le,” Forschungsheft der Forschungsvereinigung Antriebstechnik e.V., Heft 41.
10.
Dowson
,
D.
,
1967–68
, “
Elastohydrodynamics
,”
Proc. Inst. Mech. Eng.
,
182
, Pt
3A
, pp.
51
167
.
11.
Murch
,
L. E.
, and
Wilson
,
W. R. D.
,
1975
, “
A Thermal Elastohydrodynamic Inlet Zone Analysis
,”
Trans. ASME J. Lubr. Technol., Series F
97
, No.
2
, pp.
212
216
.
12.
Dowson, D., and Toyoda, S., 1979, “A Central Film Thickness Formula for Elastohydrodynamic Line Contacts,” in Proceedings of the 5th Leeds-Lyon Symposium on Tribology on Elastohydrodynamics and Related Topics, D. Dowson, C. M. Taylor, M. Godet, and D. Berthe, eds., Mechanical Engineering Publications, Bury St. Edmunds, Suffolk, pp. 104–115.
You do not currently have access to this content.