Figures

Figure 1

Pure metal vapor pressure over metal solid at 1 atmosphere of inert gas.

Figure 2

Refractory metal vapor pressure over their carbides and/or nitrides in graphite furnace system at 1 atmosphere of nitrogen.

Figure 3

Line scan of the cross-sectional area of TaC foil with AlN crystal showing N "segregation" and C "depletion".

Figure 4

Sliced and polished AlN crystal grown in tungsten crucible.

Figure 5

Needle and kite-shape AlN crystals grown in graphite crucible.

Figure 6

AlN crystal produced in HPBN crucible up to 60 mm2.

Figure 7

Raman spectrum for AlN crystal as seen in figure 6.

Figure 8

Transmission topograph (g = 0002, = 0.69Å) showing inclusions (I). Arrow marks indicate contrast from surface artifacts such as ridges, scratches, strains, and cracks due to crystallites.

© 2004 The Materials Research Society