Elastic properties of boron carbides
Conference
·
· AIP Conference Proceedings (American Institute of Physics); (United States)
OSTI ID:7116054
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Boron carbides made by hot pressing exist as a single phase with compositions between 10 and 20 atomic percent carbon. The longitudinal and shear ultrasonic velocities were measured on fully dense boron carbides with compositions throughout the single-phase region. Both longitudinal and shear velocities decreased rapidly when the carbon content was below 13 atomic percent. Young's modulus, shear modulus, bulk modulus, compressibility, and Poisson's ratio, were calculated from the ultrasonic velocities. The results show that boron carbides become substantially more compressible for carbon concentrations below 13%. This softening is consistent with B{sub 12} icosahedra replacing B{sub 11}C icosahedra in this composition range.
- OSTI ID:
- 7116054
- Report Number(s):
- CONF-900870--
- Conference Information:
- Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 231:1
- Country of Publication:
- United States
- Language:
- English
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