Self-propagating high-temperature synthesis of nanostructured titanium aluminide alloys with varying porosity

Farley, Cory; Turnbull, Travis; Pantoya, Michelle L.; Hunt, Emily M.

doi:10.1016/j.actamat.2010.12.044

Cited by 13 publications

(4 citation statements)

References 15 publications

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“…Of course, this phenomenon is much more effective in reactants of nano-sized scale [16]. Even solid/solid reactions are highly intensified using nano-sized particles [27,35].…”

Section: Discussionmentioning

confidence: 97%

Air-exposed combustion synthesis of Al2O3 nanofibers in Al/TiO2/C system

Amel-Farzad

Vahdati-Khaki

Haerian

2013

Ceramics International

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“…Of course, this phenomenon is much more effective in reactants of nano-sized scale [16]. Even solid/solid reactions are highly intensified using nano-sized particles [27,35].…”

Section: Discussionmentioning

confidence: 97%

Air-exposed combustion synthesis of Al2O3 nanofibers in Al/TiO2/C system

Amel-Farzad

Vahdati-Khaki

Haerian

2013

Ceramics International

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“…The CS of SiC rod-type particles with aspect ratio 10 2 (Figure 7c) was accomplished in the Si-teflon (PTFE) system [81]. Using PTFE as a carbon-containing and gasifying precursor was suggested in early work [82], and recently has attracted significant attention [83][84][85], such as when it was used to produce SHS-graphene [86]. Single-layer and few-layer graphene sheets were prepared in the SiC-PTFE system by SHS mode in an argon environment.…”

Section: Shs Powdersmentioning

confidence: 99%

Self-propagating high-temperature synthesis of advanced materials and coatings

Левашов

Mukas'yan

Rogachev

et al. 2016

International Materials Reviews

299

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Self-propagating high-temperature synthesis (SHS) or combustion synthesis (CS) is a rapidly developing research area. SHS materials are being used in various fields, including mechanical and chemical engineering, medical and bioscience, aerospace and nuclear industries. The goal of the present paper is to provide a comprehensive state-of-the-art review and to analyse a critical mass of knowledge in the field of SHS materials and coatings. We also briefly discuss the history and scientific foundations of SHS along with an overview of the technological aspects for synthesis of different materials, including powders, ceramics, metal-ceramics, intermetallides, and composite materials. Application of CS in the field of surface engineering is also discussed focusing on two main routes for applying SHS to coating deposition: (i) single-step formation of the desired coatings and (ii) use of SHSderived powders, targets or electrodes in the coating deposition processes.

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“…These additional factors include powder density, the thickness of the natural oxide layer that chemically passivates the particles, the stoichiometry (metal oxide over metal ratio) [3][4][5][6][7][8]. This tunability makes thermites promising in replacement of CHNO energetics for a large variety of applications such as propulsion [9], in-situ welding [10,11], material synthesis [12][13], generation of biocidal-agents [14,15], initiations [16][17][18], actuations in microsystems [19][20][21][22] and chips self-destruction [23][24][25]. Currently only general correlations between microscopic (particles size, stoichiometry …) and mesoscopic properties (powder compaction) of the thermite and its combustion behavior do exist, mostly derived from three decades of experimentations on thermite systems in research laboratories [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Comprehending the influence of the particle size and stoichiometry on Al/CuO thermite combustion in close bomb: A theoretical study

Tichtchenko

Bédat²,

Simonin³

et al. 2023

Propellants Explo Pyrotec

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The paper is a theoretical exploration of complex Al/CuO thermite combustion processes, using a zero-dimensional (0D) model which integrates both condensed phase and gas phase reactions, and considers all thermodynamic stable molecular or atomic species identified during the Al + CuO reaction. We found that the particle size mainly influences the reaction kinetics and pressure development. Thermite with nano-sized particles (nanothermites) burns ~10 times faster than the same thermite with micron-sized particles (microthermites). This is due to the fact that the thermite reaction occurs mainly in condensed phase, i. e. in the melted Al phase, as all gaseous oxygens released by the CuO decomposition are spontaneously absorbed on the huge specific surface area of metallic Al. As a consequence, the pressure development in nanothermites follows the thermite chemical reaction, the gas phase is mostly composed of a metal vapor (mostly Cu and Al), Al suboxides, but is free of molecular oxygen. In contrast, when dealing with microthermites, an oxygen pressure peak occurs prior to the thermite reaction due to the gaseous O 2 released by the early CuO decomposition, that cannot be absorbed on the Al particles surface in real time. The powder stoichiometry greatly impacts the final pressure. Al lean thermites generate a higher final pressure (× 3) than stoichiometric and Al rich mixtures, due to unreacted gaseous oxygen which remains in the gas phase after the full consumption of the metallic Al.

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Self-propagating high-temperature synthesis of nanostructured titanium aluminide alloys with varying porosity

Cited by 13 publications

References 15 publications

Air-exposed combustion synthesis of Al2O3 nanofibers in Al/TiO2/C system

Air-exposed combustion synthesis of Al2O3 nanofibers in Al/TiO2/C system

Self-propagating high-temperature synthesis of advanced materials and coatings

Comprehending the influence of the particle size and stoichiometry on Al/CuO thermite combustion in close bomb: A theoretical study

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