Measuring and testing – Hardness – By penetrator or indentor
Reexamination Certificate
2007-10-30
2007-10-30
Williams, Hezron (Department: 2856)
Measuring and testing
Hardness
By penetrator or indentor
C073S15000R
Reexamination Certificate
active
11316471
ABSTRACT:
A method for measuring toughness of interfacial adhesion including applying a normal force with a probe to a surface of a coating joined to a major surface of a substrate of a medical device, wherein the surface is substantially parallel to the major surface, and applying a lateral force to the coating with the probe by laterally moving a position of the probe relative to the major surface such that the probe forms at least one delaminated region in the coating as the position of the probe moves laterally across the major surface, the delaminated region having a starting point and an ending point. The method further includes measuring a magnitude of the lateral force over time, and determining a toughness of interfacial adhesion between the coating and the major surface based on changes in magnitude of the lateral force as the position of the probe moves from the starting point to ending point.
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Nay Richard J.
Vodnick David J.
Wyrobek Thomas J.
Yang Dehua
Bellamy Tamiko
Dicke, Billig & Czaja P.L.L.C.
Hysitron, Inc.
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