PHYSICAL PROPERTIES OF SINTERED BeO AS INFLUENCED BY MICROSTRUCTURE

Technical Report · Tue Jan 01 04:00:00 EST 1963

DOI:https://doi.org/10.2172/4690106· OSTI ID:4690106

Chandler, B. A.; Fryxell, R. E.

Physical properties are presented for extruded an sintered BeO from 25 to 1400 deg C as a function of porosity (0 to 15%), grain size (5 to 100 microns), and grain orientation (random to 80% preferred). The elastic constants and linear thermal expansion are senisitive to the degree of preferred grain orientation. Measurements on polycrystallime specimens permitted calculation of the anisotropy in single crystals of BeO. Moduius of rupture data is treated in terms of the Knudsen equation and compressive creep data im terms of the Nabarro- Herring equation, the latter leading to estimates of the diffusion coefficient for Be at 1200 deg C. (auth)

• Research Organization: General Electric Co. Advanced Technology Services, Cincinnati
• DOE Contract Number: AT(40-1)-2847
• NSA Number: NSA-17-030968
• OSTI ID: 4690106
• Report Number(s): CONF-50-4; TM-63-5-4
• Country of Publication: United States
• Language: English

Related Subjects

ANISOTROPY
BERYLLIUM OXIDES
CONFERENCE
DIFFUSION
ELASTICITY
EQUATIONS
EXPANSION
EXTRUSION
GRAIN SIZE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
MONOCRYSTALS
PEIERLS-NABARRO FORCE
POROSITY
SINTERED MATERIALS
TEMPERATURE