INVESTIGATION OF INTERMETALLIC COMPOUNDS FOR VERY HIGH TEMPERATURE APPLICATIONS

Technical Report · Thu Dec 01 04:00:00 EST 1960

OSTI ID:4832106

Booker, J; Paine, R M; Stonehouse, A J

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 deg F. The compounds studied were TaBe/sub 12/. Ta/sub 2/Be/sub 17/, Hf/sub 2/Be/sub 21/, MoS/ sub 12/ , TaSi/sub 2/, and WSi/sub 2/. An investigation of the rates of oxidation of intermetallic beryllides was initiated. The oxidation of TaBe/sub 12/, Hf/sub 2/ Be/sub 21/, ZrBe/sub 13/, and Ta/sub 2/Be/sub 13/ at 2300 to 2750 deg 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 ZrBe/ sub 13/ at 2500 deg F were identified as Zr/sub 2/Be/sub 17/ and BeO. Tentative activation energies for a cubic rate process were calculated for TaBe/sub 12/ and Hf/sub 2/Be/sub 21/. (auth) refined. (auth)

• Research Organization: Brush Beryllium Co., Cleveland
• NSA Number: NSA-16-018044
• OSTI ID: 4832106
• Report Number(s): WADD-TR-60-889; AD-265625
• Country of Publication: United States
• Language: English

Related Subjects

ACTIVATION ENERGY
BERYLLIUM ALLOYS
BERYLLIUM OXIDES
EXCITATION
HAFNIUM ALLOYS
HIGH TEMPERATURE
INTERMETALLIC COMPOUNDS
MATHEMATICS
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM COMPOUNDS
OXIDATION
REACTION KINETICS
SILICIDES
TANTALUM ALLOYS
TANTALUM COMPOUNDS
TUNGSTEN ALLOYS
TUNGSTEN COMPOUNDS
USES
ZIRCONIUM ALLOYS