Browse Publications Technical Papers 2003-01-1982
2003-05-19

Testing Method and Effect of ATF Performance on Degradation of Wet Friction Materials 2003-01-1982

Degradation of wet friction materials can cause changes in friction characteristics and a reduction of material strength. The former changes may reduce the friction coefficient or result in a μ-V characteristic with a negative slope. It is well known that the blocking of friction material pores substantially affects changes in characteristics. A decline in strength may reduce the thickness of friction materials and lead to delamination in the worst case. This paper presents the results of a study concerning the effect of the automatic transmission fluid (ATF) on friction material pore blockage and reduction of material strength (delamination life). It was found that the high-temperature detergency of ATFs affects the blocking of friction material pores and that ATF compatibility with cellulose fiber affects the reduction of friction material strength. It was also found that the respective degree of influence of the ATF could be evaluated by a hot-tube test and differential thermal analysis.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

A Study of Additive Effects on ATF Frictional Properties Using New Test Methods

902150

View Details

TECHNICAL PAPER

ATF Nylon Degradation

971625

View Details

TECHNICAL PAPER

Static Friction - What It Is, What Affects It

941034

View Details

X