TY - JOUR
T1 - Combustion characteristics and structure of carbon nanotube/titanium composites
AU - Korchagin, Michail A.
AU - Gabdrashova, Sholpan E.
AU - Dudina, Dina V.
AU - Bokhonov, Boris B.
AU - Bulina, Natalia V.
AU - Kuznetsov, Vladimir L.
AU - Ishchenko, Arcady V.
PY - 2019/9/30
Y1 - 2019/9/30
N2 -
Abstract: Reactivity of nanosized objects is a hot topic in modern solid-state chemistry and materials science. The present work is focused on the interaction between multi-walled carbon nanotubes (MWCNTs) and metallic titanium during high-energy ball milling and thermal explosion, a rapid temperature rise in a mixture caused by an exothermic reaction ignited by external heating and occurring throughout the sample volume. A fundamental property of the nanocomposite mixture—the ability of its components to react in the combustion mode—is explained; an analysis of the dependence of the combustion characteristics of the nanocomposites on the milling duration of powder mixtures is provided. The phase and structural transformations of the Ti-MWCNT mixtures have been analyzed using X-ray diffraction and transmission electron microscopy. It was found that the ball-milled powders contain nanostructured titanium, nanotube fragments, amorphous carbon and nanosized carbon-deficient titanium carbide TiC
x
. Within the nanocomposite powder particles, TiC
x
nanoparticles are covered with layers of amorphous carbon. Thermal explosion was observed in Ti-4mass%MWCNT mixtures milled for 1.5–7 min. Shorter milling times were apparently not sufficient for establishing a proper interfacial contact, while longer milling times led to the extensive formation of titanium carbide TiC
x
, which acted as a barrier lowering the heat release by the mixture upon ignition. Both the ignition temperature of Ti-4mass%MWCNT and the maximum temperature developed during thermal explosion decrease with the milling time. A comparison of the behavior of MWCNT with that of carbon black under conditions of thermal explosion in the mixtures with titanium is also presented. Graphical abstract: [Figure not available: see fulltext.].
AB -
Abstract: Reactivity of nanosized objects is a hot topic in modern solid-state chemistry and materials science. The present work is focused on the interaction between multi-walled carbon nanotubes (MWCNTs) and metallic titanium during high-energy ball milling and thermal explosion, a rapid temperature rise in a mixture caused by an exothermic reaction ignited by external heating and occurring throughout the sample volume. A fundamental property of the nanocomposite mixture—the ability of its components to react in the combustion mode—is explained; an analysis of the dependence of the combustion characteristics of the nanocomposites on the milling duration of powder mixtures is provided. The phase and structural transformations of the Ti-MWCNT mixtures have been analyzed using X-ray diffraction and transmission electron microscopy. It was found that the ball-milled powders contain nanostructured titanium, nanotube fragments, amorphous carbon and nanosized carbon-deficient titanium carbide TiC
x
. Within the nanocomposite powder particles, TiC
x
nanoparticles are covered with layers of amorphous carbon. Thermal explosion was observed in Ti-4mass%MWCNT mixtures milled for 1.5–7 min. Shorter milling times were apparently not sufficient for establishing a proper interfacial contact, while longer milling times led to the extensive formation of titanium carbide TiC
x
, which acted as a barrier lowering the heat release by the mixture upon ignition. Both the ignition temperature of Ti-4mass%MWCNT and the maximum temperature developed during thermal explosion decrease with the milling time. A comparison of the behavior of MWCNT with that of carbon black under conditions of thermal explosion in the mixtures with titanium is also presented. Graphical abstract: [Figure not available: see fulltext.].
KW - Ball milling
KW - Multi-walled carbon nanotubes
KW - Thermal explosion
KW - Titanium
KW - Titanium carbide
KW - THERMAL-EXPLOSION
KW - BEHAVIOR
KW - NANOTUBES
KW - TITANIUM
KW - MECHANICAL-PROPERTIES
KW - HIGH-TEMPERATURE SYNTHESIS
UR - http://www.scopus.com/inward/record.url?scp=85062726343&partnerID=8YFLogxK
U2 - 10.1007/s10973-019-08109-8
DO - 10.1007/s10973-019-08109-8
M3 - Article
AN - SCOPUS:85062726343
VL - 137
SP - 1903
EP - 1910
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
SN - 1388-6150
IS - 6
ER -