International Journal of Self-Propagating High-Temperature Synthesis
International Journal of Self-Propagating High-Temperature Synthesis is a peer-reviewed journal that explores a broad spectrum of subjects pertaining to self-propagating high-temperature synthesis (SHS) and related areas. SHS is a method used to produce advanced materials by harnessing internally generated chemical energy through solid-state combustion. The journal covers a wide range of subjects, including the fundamentals of SHS processes, the chemistry and technology of SHS products and advanced materials, as well as related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The primary objective of the journal is to facilitate a broad exchange of research findings and promote a deeper understanding of the developmental and innovative trends in SHS science and applications. As part of its aim to become an international publication, the journal welcomes submissions in English from all countries.
Peer review and editorial policy
The journal follows the Springer Nature Peer Review Policy, Process and Guidance, Springer Nature Journal Editors' Code of Conduct, and COPE's Ethical Guidelines for Peer-reviewers.
Approximately 5% of the manuscripts are rejected without review based on formal criteria as they do not comply with the submission guidelines. Each manuscript is assigned to two peer reviewers. The journal follows a single-blind reviewing procedure. The period from submission to the first decision is up to 5 weeks. The approximate rejection rate is 10%. The final decision on the acceptance of a manuscript for publication is made by the Editor-in-Chief and responsible editors taking into account the opinions of Editorial Board members.
If Editors, including the Editor-in-Chief, publish in the journal, they do not participate in the decision-making process for manuscripts where they are listed as co-authors.
Special issues published in the journal follow the same procedures as all other issues. If not stated otherwise, special issues are prepared by the members of the Editorial Board without guest editors.
Current Issue
Vol 28, No 4 (2019)
- Year: 2019
- Articles: 13
- URL: https://journals.rcsi.science/1061-3862/issue/view/12295
Article
Metallothermic SHS in Conditions of Artificial Gravity: Mathematical Modeling
Abstract
Metallothermic SHS in conditions of artificial gravity was numerically modelled for the 3NiO + 2Al → Al2O3 + 3Ni reaction taken as an example. The process was assumed to include (a) high-temperature combustion reaction yielding liquid products, (b) their gravity-assisted separation, and (c) cooling down. In our ‘throughout’ mathematical model, a three-component emulsion—gas, metal, and ceramics—with individual translational velocities and temperatures was considered. Our model may expectedly extend the range of control means for SHS reactions in extreme conditions.
Combustion of Gasless Systems: Thermocapillary Convection of Metal Melt
Abstract
The role of thermocapillary convection in combustion of gasless binary mixtures containing a low-melting reagent was explored by numerical modeling. Variation in relative amounts of reagents and starting sample porosity was found to change a mode of combustion wave propagation over the binary systems under consideration.
Solution Combustion Synthesis of ZnO Using Binary Fuel (Glycine + Citric Acid)
Abstract
Solution combustion synthesis (SCS) of zinc oxide was performed using a binary fuel, glycine and citric acid. It was established that combustion occurs due to oxidation of zinc nitrate–glycine complexes. Citric acid acts as an inhibitor of SCS reaction. An increase in relative content of organic fuel in the solution leads to a reduction in maximal combustion temperature and to formation of elemental carbon (0.2–1.6 wt %) and organic fragments (1.55–3.29 wt %) in SCS-produced zinc oxide. Carbon impurity and organic fragments were removed by annealing at 600°С. The produced wurtzite-type ZnO crystals had a size of 27–37 nm and were assembled into agglomerates. After annealing at 500°С, the specific surface of the powder was 8.44–11.09 m2/g. The photocatalytic activity of ZnO powder was evaluated from the rate of hydroquinone photodecomposition in solution.
SHS Reprocessing of Copper Oxide Waste into Copper Powder
Abstract
Here we report on a single-step, eco-friendly, and facile approach to combustion-assisted reprocessing of oily copper waste into copper powder without preliminary cleaning. Complete reduction of copper from oily copper waste in the combustion wave was reached in the presence of ammonium nitrate and without introducing any reducing agent. The optimal conditions for obtaining >99 % copper powder were reached for green [Cu2O + m(oil)] + xNt mixtures with m = 7–11 wt % and x = 0.35–0.55, were m stands in wt % and x in mole fractions, both in relation to 1 g-mol of Cu2O. In scale-up experiments (up to 10 kg of green mixture), the copper powder with oxygen content below 0.5 wt % and free carbon content below 0.25 wt % was successfully produced. Our approach was also successfully applied to combustion-assisted reduction of copper oxide oily waste mixed with nickel oxide to yield composite powders and Cu–Ni alloys.
Thermodynamic Analysis of the CaO–Y2O3–ZrO2–Ti–Fe2O3 System as a Precursor for SHS-Produced Pyrochlore-Based Ceramics
Abstract
The paper reports on the thermodynamic analysis of the CaO–Y2O3–ZrO2–Ti–Fe2O3 system as a precursor for SHS-produced pyrochlore-based ceramics. Adiabatic combustion temperature Tad and equilibrium concentration of pyrochlore were first calculated for the quasi-ternary system Y2O3–ZrO2–(Ti + Fe2O3) containing no CaO. It was found that, in the presence of CaO, a best yield of Zr-enriched pyrochlore ceramic can be reached within the following domain of green compositions (wt %): CaO 2.5–5.0, Y2O3 22.5–35.0, ZrO2 7.5–22.5, and (40% Ti + 60% Fe2O3) 45.0–60.0; within this domain, Tad = 2100–2400°K. Although in control experiments Tad was found to be within the range 1700–1970 K, nevertheless the combustion products always showed the presence of pyrochlore-based ceramic, as predicted by thermodynamic analysis.
Electron Beam Assisted Deposition of Ni–Al Coatings onto Steel Substrate
Abstract
We suggest a mathematical model for electron-beam assisted deposition of protective coatings that involves the equations of heat conduction, chemical kinetics, and porosity evolution. The model was numerically applied to the reactive Ni–Al system and theoretical predictions were critically analyzed by comparison with experiment.
Porous Ni–Al–CGO Cermet for Use in Solid Oxide Fuel Cells
Abstract
Porous Ni–Al–CGO cermet (CGO = Сe0.9Gd0.1O2) for use in solid oxide fuel cells was fabricated by thermal explosion (volume reaction) in Ni–Al–CGO powder compacts in different heat sink conditions. Temperature profiles of thermal explosion were recorded and analyzed as a function of green composition. Phase composition of resultant porous materials was found to depend on the CGO content of green mixture and temperature of vacuum annealing. Starting and final materials were characterized by XRD, SEM, and EDS. Synthesized uniform cermets with a porosity of 50–60% can be recommended for use as a support for solid oxide fuel cells with Ni/CGO anode.
SHS of Ti3SiC2-Based Materials in the Ti–Si–C System: Impact of Silicon Excess
Abstract
For SHS of Ti3SiC2-based materials in the Ti–Si–C system, we explored the impact of silicon excess on the composition of resultant MAX-phase material by XRD and SEM methods. After hot pressing, SHS-produced MAX-phase material was found to contain over 88 wt % of Ti3SiC2. The SHS-produced powders are sinterable and deserve further studies on their hot pressing and pressure-less reactive sintering.
Single-Step Solution-Combustion Synthesis of Magnetically Soft NiFe2O4 Nanopowders with Controllable Parameters
Abstract
One-step solution-combustion synthesis with glycine as a fuel was used to obtain ferromagnetic nickel ferrite (NiFe2O4) spinel. According to EDX data, the elemental composition of all synthesized samples corresponded to NiFe2O4, while the XRD results showed the formation of phase-pure nickel ferrite spinel. NiFe2O4 nanopowders had a branched porous microstructure as established by SEM analysis. Variation in the Red/Ox ratio (glycine to nitrate ratio G/N = 0.4, 0.6, 0.8, 1.0, 1.2) was found to affect the average size of nickel ferrite crystallites (D) within the range 23–37 nm. The results of vibration magnetometry showed the ferromagnetic ordering in magnetic moments of NiFe2O4 nanopowders. The magnetic parameters of synthesized nickel ferrite—saturation magnetization Ms = 31–59 emu/g, remanent magnetization Mr = 3–13 emu/g, and coercive force Hc = 10–95 Oe—were found to depend on crystallite size D. The fact that the values of Ms, Mr, and Hc grow with increasing D opens up a way to synthesis of NiFe2O4 nanopowders with controllable magnetic parameters by simply varying the G/N ratio of starting solution.