Lubricant Additives

194 Lubricant Additives: Chemistry and Applications

Another advantage of using boron nitride is the heat conductivity property of the material. For
applications that would require rapid heat dissipation, boron nitride serves quite well and is superior
to graphite in that regard. Thermal conductivity values of boron nitride powder will vary depending
on its quality. But, boron nitride in any of its grades is invariably more thermally conductive than
graphite or MoS 2. Applications such as high-performance cutting oils are claimed to deliver benefi ts
of enhanced lubrication and heat withdrawal when fi nely dispersed submicron particles of boron
nitride are incorporated into the fl uid [17].

REFERENCES

1. Jacobs, N.L. U.S. Patent 5,180,509. 1/19/93.


2. Ludema, K.C. Friction, Wear, Lubrication, A Textbook in Tribology. Boca Raton, FL: CRC Press, 1996,
   p. 123.


3. Acheson Colloids company, J. Brian Peace Lecture.


4. Clauss, F.J. Solid Lubricants and Self-Lubricating Solids. New York: Academic Press, 1972, p. 45.


5. Savage, R.H. Graphite lubrication. J Appl Phys 19:1, 1948.


6. Barry, H.F. Factors relating to the performance of MoS 2 as a lubricant. J Am Soc Lubr Eng 33(9):475– 480,
   1977.


7. Kohli, A.K., B. Prakash. Contact pressure dependency in frictional behavior of burnished molybdenum
   disulphide coatings. Tr ib olog y Tra n s 44(1), 2001.


8. Du Pont Tefl on® Fluoroadditives brochure.


9. Bowden, F.P., D. Tabor. The Friction and Lubrication of Solids. New York: Oxford University Press,
   1986, p. 165.


10. Kaur, R.G., C.F. Higgs, H. Hesmat. Pin-on-disc tests of pelletized molybdenum disulfi de. Tr ib olog y
    Tra n s 44:79–87, 2001.


11. Pacholke, P.J., K.M. Marshek. Improved worm gear performance with colloidal molybdenum disulfi de
    containing lubricants. ASLE paper presented at the 41st Annual Meeting in Toronto, Ontario, Canada,
    May 12–15, 1986.


12. Haviland, M.L., M.C. Goodwin. Fuel economy improvements with friction-modifi ed engine oils in
    Environmental Protection Agency and road tests. Society of Automotive Engineers Technical Paper
    790,945, Oct. 1979.


13. Haviland, M.L., J.L. Linden. Taxicab fuel economy and engine and rear axle durability with low
    viscosity and friction modifi ed lubricants. Society of Automotive Engineers Technical Paper 821,227
    Oct. 1982.


14. Broman, V.E. et al. Testing of friction modifi ed crankcase oils for improved fuel economy. Society of
    Automotive Engineers Technical Paper 780,597, June 1978.


15. Peters, J.A. U.S. Patent, 5,702,769. 12/30/97.


16. Acheson Colloids test data.


17. Watari, K., H.J. Huang, M. Turiyama, A. Osuka, O. Yamamoto. U.S. Patent 5,985,802. 11/16/99.


18. ZYP Coatings technical data sheet, Boron Nitride Powders for Research and Industry.


19. Booser, R.E. Theory and Practice of Tribology, Vol. II. Theory and Design. Boca Raton, FL: CRC
    Press, 1983, p. 276.