TRANSFORMATIONS IN NANO-DIAMONDS WITH FORMATION OF NANO-POROUS SILICON CARBIDE AT HIGH PRESSURE
Abstract
The paper contains investigations on regularities of diamond - silicon carbide composite structure formation at impact-wave excitation. It has been determined that while squeezing a porous blank containing Si (SiC) nano-diamond by explosive detonation products some processes are taking place such as diamond nano-particles consolidation, reverse diamond transition into graphite, fragments formation from silicon carbide. A method for obtaining high-porous composites with the presence of ultra-disperse diamond particles has been developed. Material with three-dimensional high-porous silicon-carbide structure has been received due to nano-diamond graphitation at impact wave transmission and plastic deformation. The paper reveals nano-diamonds inverse transformation into graphite and its subsequent interaction with the silicon accompanied by formation of silicon-carbide fragments with dimensions of up to 100 nm.
About the Authors
V. N. Kovalevsky
Belarusian National Technical University
S. V. Grigoriev
Belarusian National Technical University
А. E. Zhuk
Belarusian National Technical University
A. V. Kovalevskay
Belarusian National Technical University
I. F. Fomikhina
Belarusian National Technical University
References
1. Микроструктура и механические свойства компактов наноалмаз – SiC / Е. А. Екимов [и др.] // Физика твердого тела. – Т. 46, вып. 4. – С. 734–736.
2. Ударно-волновая консолидация микропорошков сверхтвердых и алмазоподобных композиционных материалов / И. В. Петров [и др.] // Слоистые композиционные материалы. – Волгоград, 2001. – С. 266–269.
3. Корчагина, С. Б. Наноструктурные материалы из наноалмазов: материалы 1-й междунар. науч. конф. «Наноструктурные материалы-2008» / С. Б. Корчагина, С. К. Гордеев. – Минск : Белорус. наука, 2008. – 451 с.
4. Технологические особенности получения композитов с использованием высоких давлений / В. Н. Ковалевский [и др.] // Материалы, технологии, инструменты. – 2005. – Т. 10, № 1. – С. 62–66.
5. Структурообразование карбидокремниевой матрицы в композиции алмаз – карбид кремния / В. Н. Ковалевский [и др.] // Огнеупоры и техническая керамика. – 2005. – № 5. – С. 4–8.
Review
For citations:
Kovalevsky V.N., Grigoriev S.V., Zhuk А.E., Kovalevskay A.V., Fomikhina I.F. TRANSFORMATIONS IN NANO-DIAMONDS WITH FORMATION OF NANO-POROUS SILICON CARBIDE AT HIGH PRESSURE. Science & Technique. 2010;(2):19-23. (In Russ.)
Views:
604
Email this article 