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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Relative density curves <strong>of</strong> the different alum<strong>in</strong>a samples that conta<strong>in</strong> Ti wire is<br />
illustrated <strong>in</strong> Figure 4.24. It is seen that the densities <strong>of</strong> the CR6-Ti and the CR15-Ti<br />
samples are 78% and 91%, respectively. Figures 4.3 and 4.24 are compared and it is<br />
possible to concluded that the density <strong>of</strong> the samples is higher at 800 o C.<br />
Relative Density (%)<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
CR15-Ti<br />
CR30F-Ti<br />
CR6-Ti<br />
Figure 4.24. Relative density curve <strong>for</strong> powder compacts (UP 150MPa) <strong>of</strong> alum<strong>in</strong>a<br />
CR6-Ti, CR15-Ti and CR30F-Ti, that <strong>use</strong>d titanium wire, dur<strong>in</strong>g<br />
s<strong>in</strong>ter<strong>in</strong>g at a heat<strong>in</strong>g rate <strong>of</strong> 5 o C/m<strong>in</strong>.<br />
In addition to relative density curves <strong>of</strong> samples conta<strong>in</strong><strong>in</strong>g Ti wire,<br />
densification curves <strong>of</strong> these samples are given <strong>in</strong> Figure 4.25. If we compare the Figure<br />
4.4 and Figure 4.25, we can see that the diffusion <strong>of</strong> titanium <strong>in</strong>creases the densification<br />
rate <strong>of</strong> the samples at 1350 o C.<br />
0 200 400 600 800 1000 1200 1400<br />
Temperature ( o C)<br />
46
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