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TEM, Altered layer on etch (1)<br />
At microtoming the<br />
first altered layer<br />
exhibit a waved crack,<br />
indicating changed<br />
mechanical properties<br />
Long etching time<br />
and no desmutting<br />
At both dry and wet<br />
fatigue testing, crack<br />
Propagation occurs in<br />
the bulk of the adhesive<br />
Mineral fillers are<br />
magnitudes larger than<br />
the thixotropy agent<br />
(fused silica)<br />
Aluminium<br />
Adhesive<br />
Gunnar Pettersson, Sintef<br />
5 µm<br />
Date: 2004-01-13 • Page: 34 • Hydro Aluminium
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