Bulk modulus and Young's modulus of nanocrystalline [gamma]-alumina

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04524.x· OSTI ID:6609564

Gallas, M R; Piermarini, G J ^[1]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States). Materials Science and Engineering Lab.

Compression measurements were performed for the first time on nanocrystalline [gamma]-alumina utilizing a diamond anvil cell (DAC) and the energy dispersive X-ray diffraction method. The cubic unit cell (a = 0.7924 nm) for [gamma]-alumina was found to have a volume compression of about 2.4% over the pressure range from ambient to 3.9 GPa at room temperature under both hydrostatic and nonhydrostatic conditions. Using the first-order Bridgman equation and another equation of state, the isothermal bulk modulus (B[sub 0]) was determined to be 162 [+-] 14 GPa and Young's modulus (E) was estimated to be 253 [+-] 22 GPa assuming a Poisson's ratio for [gamma]-alumina of 0.24 [+-] 0.2.

• OSTI ID: 6609564
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 77:11; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
X-RAY DIFFRACTION
YOUNG MODULUS
MECHANICAL PROPERTIES
PARTICLE SIZE
VERY HIGH PRESSURE
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SIZE
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties