Journal of Siberian Federal University. Mathematics & Physics / Opto-acoustic and Acoustic Microscopy Studies of Microstructure, Elasticity and Defects in B₄C/C₆₀ and c-BN/C₆₀ Nanocomposites

Full text (.pdf)
Issue
Journal of Siberian Federal University. Mathematics & Physics. 2019 12 (1)
Authors
Prokhorov, Vyacheslav M.; Morokov, Egor S.
Contact information
Prokhorov, Vyacheslav M.: Technological Institute for Superhard and Novel Carbon Materials Centralnaya 7a, Troitsk, Moscow, 108840 Russia; ; Morokov, Egor S.: N. M. Emanuel Institute of Biochemical Physics RAS (IBCP RAS) Kosigina, 4, Moscow, 119334 Russia;
Keywords
elastic moduli; acoustic microscopy; laser optoacoustic; carbon-ceramic nanocomposites
Abstract

Carbon-ceramic nanocomposites based on boron carbide with fullerene C60 (B4C/C60) and cubic boron nitride with C60 (c-BN/C60) were prepared by a high-energy ball milled pre-treatment of the initial mixture of components with the addition of a CS2 solvent followed by a high-pressure/high-temperature consolidation. Elastic properties of the composites were characterized by the elastic moduli calculated on the bases of the experimentally measured density and values of velocities of the longitudinal and transverse bulk acoustic waves (BAW) in the samples. The BAW velocities were measured with a pulse-echo method by laser optoacoustic excitation of ultrasonic pulses. Acoustic microscopy was used to visualize the bulk microstructure and internal defects, and to measure the local values of BAW velocities of specimens on which the elastic moduli were calculated

Pages
85–93
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/109335