use of metal templates for microcavity formation in alumina

Wt (%)
50
45
40
35
30
25
20
15
10
5
0
0 100 200 300 400 500
Figure 4.33. EDS line analysis of the sample CR15-St.
4.3.6. Copper Diffusion into Alumina
Distance (µm)
Copper diffusion into alumina is shown in Figure 4.34. The circle indicates
diffusion region. The copper wire has almost completely melted into the alumina
leaving behind a void. The void diameter is much larger than the original wire diameter.
(a) (b)
Al2O3
Al wt%
Cr wt%
Fe wt%
Ni wt%
Figure 4.34. SEM micrographs of alumina CR30F that contained copper wire
(a) 5 o C/min at magnification of 100X (b) 5 o C/min at magnification
of 500X.
53