Pressure-density behavior for AlN, Al/sub 2/O/sub 3/, SiO/sub 2/, TiB/sub 2/ and TiC powders up to 3. 5 GPa
1984
As part of a program to model the behavior of ceramic bodies suitable for high-strength, low-density applications, the pressure-density characteristics are determined for AlN, Al/sub 2/O/sub 3/, SiO/sub 2/, TiB/sub 2/, and TiC powders at 20/sup 0/C and a strain rate of 2 x 10/sup -4//sec. The pressure range is 0.11 MPa to 3.5 GPa. Both the loading and unloading cycles are examined. The pressure-density behavior can be represented by an empirical equation of state similar in functional form to the Birch-Murnaghan equation. The logarithm of the net compaction decreases linearly with the initial density ratio for AlN powder, and may do so for the others. The results constitute a database for testing models of powder behavior such as the P-..cap alpha.. model.
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