An article inLubrication Engineeringdescribes the results of an experiment designed to investigate the effects of carbon material properties on the progression of blisters on carbon face seals. The carbon face seals are used extensively in equipment such as air turbine starters. Five different carbon materials were tested, and the surface roughness was measured. The data are as follows:
Carbon Material Type
Surface Roughness
EC10
0.50
0.55
0.36
EC10A
0.31
0.07
0.25
0.18
0.56
0.20
EC4
0.28
0.12
EC1
0.10
0.16
Summarize your conclusions regarding the effect of material type on surface roughness.
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