DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
INVESTIGATION OF INTERMETALLIC COMPOUNDS FOR VERY HIGH TEMPERATURE APPLICATIONS
BRUSH BERYLLIUM CO CLEVELAND OH
Pagination or Media Count:
Intermetallic beryllides from the systems Ta-Be, W-Be, and Hf-Be along with the disilicides of W, Ta, and Mo, were screened for compounds capable of serving as structural materials at temperatures above 2500 F. The compounds studied were TaBe12, Ta2Be17, Hf2Be21, MoSi2, TaSi2, and WSi2. An investigation of the rates of oxidation of intermetallic beryllides was initiated. The oxidation of TaBe12, Hf2Be21, ZrBe13, and Ta2Be17 in the range 2300 to 2750 F was found to obey an exponential rate law which was cubic or a higher power rate law. In most cases, the cubic rate law applied. The products of the oxidation of ZrBe13 at 2500 F were identified as Zr2Be17 and BeO. Tentative activation energies for a cubic rate process were calculated for TaBe12 and Hf2Be21.
APPROVED FOR PUBLIC RELEASE