Peculiarities of changes of some physicomechanical characteristics of monoisotopes 10B, 11B and natural β-boron
| Autor: | Domenti Gabunia, Levan Gabunia, Otar Tsagareishvili, George Darsavelidze, Marina Antadze, T. Tanaka, David Lezhava |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Annealing (metallurgy)
Chemistry Analytical chemistry Mineralogy chemistry.chemical_element Real structure Isotopes of boron Condensed Matter Physics Thermal expansion Electronic Optical and Magnetic Materials Inorganic Chemistry Shear modulus Thermal conductivity Materials Chemistry Ceramics and Composites Physical and Theoretical Chemistry Boron Elastic modulus |
| Zdroj: | Journal of Solid State Chemistry. 179:2944-2948 |
| ISSN: | 0022-4596 |
| Popis: | Real structure and some physicomechanical characteristics of the samples of natural beta-rhombohedral boron B as well as of its {sup 10}B and {sup 11}B monoisotopes have been studied. It was shown that the influence of {sup 10}B and {sup 11}B isotopes on physicomechanical properties of boron had a different character. In particular, the samples enriched with {sup 11}B had high values of microhardness, shear modulus (SM) and elastic limit if compared to those of boron, while the samples enriched with {sup 10}B monoisotopes were characterized with high values of thermal expansion coefficient (TEC) and thermal conductivity; lattice parameters a and c increased by the sequence: {sup 11}B, B, {sup 10}B. It was established that TEC, thermal conductivity, microhardness, SM and shear elastic limit increased in all samples at annealing for 5 h at 1500 deg. C regardless of isotope content. - Graphical abstract: Temperature dependence of the SM in the samples of natural boron B, {sup 10}B and {sup 11}B monoisotopes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect