High-pressure effect on dislocation density in nanosize diamond crystals

Diamond nanosize powders were treated at pressures ranging from 2.0 to 8.0 GPa at a constant temperature of 1470 K. X-ray diffraction peak profiles of treated samples were analyzed and provided information on the average crystallite sizes and the density of the dislocations. The population of disloc...

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Bibliographic Details
Published in:Diamond and related materials 2004-10, Vol.13 (10), p.1753-1756
Main Authors: Pantea, C., Gubicza, J., Ungár, T., Voronin, G.A., Nam, N.H., Zerda, T.W.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Dislocations
Exact sciences and technology
High-pressure
High-pressure and shock-wave effects in solids and liquids
Materials science
Mechanical and acoustical properties of condensed matter
Nano-size diamond
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
X-ray
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Summary:Diamond nanosize powders were treated at pressures ranging from 2.0 to 8.0 GPa at a constant temperature of 1470 K. X-ray diffraction peak profiles of treated samples were analyzed and provided information on the average crystallite sizes and the density of the dislocations. The population of dislocations increased with applied pressure while the average crystallite size did not change significantly.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2004.03.005