Maps of a polyurethane seal surface’s topography (a) and elasticity (b), obtained by the CCEFP
team using an atomic force microscope.
As presently most seals are
developed through empirical means,
understanding the viscoelastic prop-
erties of the seals at such a precise
level has allowed the team to devel-
op and test several seal designs.
One included a U-cup seal, which
was tested at Eaton Corp., a CCEFP
industrial partner. According to the
team, the results showed zero leak-
age over the entire range, which were
verified upon further examination at
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