skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Microscale friction phenomena in oscillatory sliding contacts.

Abstract

Abstract not provided.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1148273
Report Number(s):
SAND2007-3625J
522769
DOE Contract Number:
DE-AC04-94AL85000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review; Related Information: Proposed for publication in Physical Review.
Country of Publication:
United States
Language:
English

Citation Formats

Dugger, Michael T., Timpe, Shannon J., and Komvopoulos, K. Microscale friction phenomena in oscillatory sliding contacts.. United States: N. p., 2007. Web.
Dugger, Michael T., Timpe, Shannon J., & Komvopoulos, K. Microscale friction phenomena in oscillatory sliding contacts.. United States.
Dugger, Michael T., Timpe, Shannon J., and Komvopoulos, K. Fri . "Microscale friction phenomena in oscillatory sliding contacts.". United States. doi:.
@article{osti_1148273,
title = {Microscale friction phenomena in oscillatory sliding contacts.},
author = {Dugger, Michael T. and Timpe, Shannon J. and Komvopoulos, K.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {Physical Review},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}
  • Austenitic stainless steel AISI 321 is one of the most difficult-to-cut materials. In order to investigate the wear behavior of Si{sub 2}N{sub 4} ceramic when cutting the stainless steel, wear tests are carried out on a pin-on-disk tribometer, which could simulate a realistic cutting process. Test results show that the wear of Si{sub 3}N{sub 4} ceramic is mainly caused by adhesion between the rubbing surfaces and that the wear increases with load and speed. When oil is used for lubrication, the friction coefficient of the sliding pairs and the wear rate of the ceramic are reduced. A scanning electron microscopemore » (SEM), an electron probe microanalyzer (EPMA), and an energy dispersive x-ray analyzer (EDXA) are used to examine the worn surfaces. The wear mechanisms of Si{sub 3}N{sub 4} ceramic sliding against the stainless steel are discussed in detail.« less
  • Cited by 13
  • The formation and characteristics of thick films in elastohydrodynamic (EHD) contacts using pure phosphonate additives are described. Several alkyl and aryl group, pure phosphonate additives were added to rolling/sliding EHD contacts; the performance of the phosphonate additives is evaluated. It is observed that all phosphonates formed thick films from base oil solutions in rolling EHD contacts; the films have a thickness greater than a half a micron, withstand up to 10 percent sliding, and are formed in the presence of other additives. The effects of phosphonate group and temperature on the rate of film formation are investigated. The chemical propertiesmore » of the viscous reaction product and the thick films formed by the phosphonates are analyzed. The reaction product and films consist of an iron-phosphate-monoester polymer with the phosphate acting as a bridge between iron(III) species. The use of the thick antiwear films to increase specific film thickness in EHD lubrication is discussed. 31 references.« less
  • The frictional heating, and the thermal and thermal mechanical phenomena associated with it, can have a very important influence on the tribological behavior of the sliding components. The high temperature and temperature gradients result in a series of dynamic changes of structures and properties of the surface layers, such as tempering softening, martensitic transformation or even melting. As these phenomena depend on the temperature of the sliding surface layers, surface and near-surface temperatures have been of interest for many years. However, it is almost impossible to measure the friction temperature and temperature gradient near the contact area experimentally. In ordermore » to understand the nature of wear a systematic study was carried out to clarify the relation between friction temperature, wear, normal load and sliding speed.« less