Full Content is available to subscribers

Subscribe/Learn More  >

Coatings for Automotive Planetary Gearsets

[+] Author Affiliations
N. E. Anderson

General Motors Powertrain, Wixom, MI

L. C. Lev

General Motors Research & Development Center, Warren, MI

Paper No. DETC2003/PTG-48112, pp. 913-922; 10 pages
  • ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 9th International Power Transmission and Gearing Conference, Parts A and B
  • Chicago, Illinois, USA, September 2–6, 2003
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-3702-5 | eISBN: 0-7918-3698-3
  • Copyright © 2003 by ASME


The operating environment in typical automotive planetary gearsets leads to harsh tribological conditions. Relatively low operating speeds combined with low viscosity lubricants hinder the formation of protective oil films. As power density increases, gear surface fatigue (pitting) limits gear life and the life of the transmission as a whole. Coatings have been found to be effective in extending pitting fatigue life of gears. The authors have tested a number of different coatings over the last ten years. Some of them increased gear life by fifteen times in bench tests. The most successful coatings have been hard, ceramic coatings such as B4 C and Diamond-Like Carbon (DLC) that smooth the mating surface and improve the lubrication conditions in the contact. Recently CrN, a widely available and affordable coating, has been studied and found to be a good alternative to other coatings.

Copyright © 2003 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In