Microstructure characterization of nanocrystalline TiC synthesized by mechanical alloying

Ghosh, Bishnupada; Pradhan, S.K.

doi:10.1016/j.matchemphys.2009.11.048

Cited by 61 publications

(26 citation statements)

References 27 publications

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“…Occasionally, the incubation and ignition times practically coincide and therefore no product is observed before ignition. 385,435 However, in other cases, the conditions for ignition are achieved when the mechanochemical reaction has already partially progressed by a diffusional mechanism, and the products are clearly detected before ignition. 403,407 It is also possible that before reaching these optimal conditions for ignition the product formed by diffusion inhibits ignition similarly to an inert additive.…”

Section: Self-sustaining Reactionsmentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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The aim of this review article on recent developments of mechanochemistry (nowadays established as a part of chemistry) is to provide a comprehensive overview of advances achieved in the field of atomistic processes, phase transformations, simple and multicomponent nanosystems and peculiarities of mechanochemical reactions. Industrial aspects with successful penetration into fields like materials engineering, heterogeneous catalysis and extractive metallurgy are also reviewed. The hallmarks of mechanochemistry include influencing reactivity of solids by the presence of solid-state defects, interphases and relaxation phenomena, enabling processes to take place under non-equilibrium conditions, creating a well-crystallized core of nanoparticles with disordered near-surface shell regions and performing simple dry time-convenient one-step syntheses. Underlying these hallmarks are technological consequences like preparing new nanomaterials with the desired properties or producing these materials in a reproducible way with high yield and under simple and easy operating conditions. The last but not least hallmark is enabling work under environmentally friendly and essentially waste-free conditions (822 references).

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Section: Self-sustaining Reactionsmentioning

confidence: 99%

Hallmarks of mechanochemistry: from nanoparticles to technology

et al. 2013

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“…Under conditions where local regions of high defect density arise (e.g., at subgrain boundaries) the mobility of both Ti and C atoms may increase, inducing conditions which favour the nucleation of TiC at the interface between the deformed Ti and the C, particularly on fresh fracture surfaces of the Ti where dangling bonds may be present [44,45]. At the ignition point, an exothermic reaction between Ti and C powders is mechanically activated and instantaneously self-propagates in the form of a combustion wave at a very great speed to the rest of the powder [1][2][4][5][6][7][8][9][10]. This will cause rapid nucleation of new TiC crystals and growth of post-ignition nuclei.…”

Section: Possible Mechanisms Of Prior Formation Of Nano Tic During Comentioning

confidence: 99%

“…Mechanically induced self-propagating reactions (MSRs) are widely used for material synthesis but the mechanisms of these processes are not well understood [1][2][3][4][5][6]8,23,26]. In MSR, reactions induced by ball milling, the repeated mechanical action of the balls during the early stages of milling reportedly increases the temperature of the powders and the surrounding system without prior crystallization [2,[5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Early stages of phase formation before the ignition peak during mechanically induced self-propagating reactions (MSRs) of titanium and graphite

2016

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“…As one of potential and promising materials, TiC has been widely used for high temperature ceramic crucibles in the mechanical industry, cutting cools and reinforcement particles in the composites. The most widely used methods to prepare TiC are the reduction of rutile (TiO 2 ) with carbon [3], mechanical alloying [4], reaction sintering [5] and selfpropagating High-temperature synthesis (SHS) [6][7][8] and so on. Among various methods for producing TiC, SHS technology has attracted intensive interest due to its high purity of the product, low production cost and relative simplicity of the equipment [9].…”

Section: Introductionmentioning

confidence: 99%