use of metal templates for microcavity formation in alumina
use of metal templates for microcavity formation in alumina
use of metal templates for microcavity formation in alumina
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4.3.7. Results <strong>of</strong> S<strong>in</strong>ter<strong>in</strong>g <strong>of</strong> Alum<strong>in</strong>a-Ti plate-Alum<strong>in</strong>a Pellets<br />
after s<strong>in</strong>ter<strong>in</strong>g.<br />
Figure 4.39 illustrates the picture <strong>of</strong> the alum<strong>in</strong>a samples (sandwich structure)<br />
(a) (b)<br />
(c) (d)<br />
Figure 4.39. Picture <strong>of</strong> the alum<strong>in</strong>a sample (sandwich structure) (a) and<br />
(b) after s<strong>in</strong>ter<strong>in</strong>g (c) fracture surface <strong>of</strong> sample CR3000SG-<br />
Plt (d) cross sectional surface <strong>of</strong> sample CR30F-Plt<br />
The SEM micrographs <strong>of</strong> the alum<strong>in</strong>a sample that conta<strong>in</strong>s Ti plate, are given <strong>in</strong><br />
Figure 4.40. Dur<strong>in</strong>g four hour soak<strong>in</strong>g time, titanium advanced through alum<strong>in</strong>a roughly<br />
130µm at 1350 o C. As <strong>in</strong> the samples, which conta<strong>in</strong>s Ti wire, Al2TiO5 occurred <strong>in</strong> the<br />
diffusion region, and the alum<strong>in</strong>a samples had porosity. In Figure 4.40 (a), Kirkendall<br />
plane and porosity are seen and as a whole they look like craters.<br />
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