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- W2896865125 abstract "Aluminothermic reduction of ZrSiO4 in the presence of carbon was investigated in the SHS (self-propagating high-temperature synthesis) manner. PTFE was employed not only as a reaction promoter to ensure self-sustaining combustion and improve the reduction of ZrSiO4, but as a carburizing agent to take part in carbide formation. The combustion wave velocity and temperature increased with increasing PTFE content, but decreased with carbon. Based on a correlation between combustion temperature and velocity, the activation energy Ea = 180.4 kJ/mol was deduced for the PTFE-activated ZrSiO4/Al/C reaction. According to the XRD and EDS analyses, the phase composition of the synthesized product depended on the total amount of carbon. The SHS reaction produced Al2O3-added Zr-silicides (ZrSi2 and ZrSi)/carbides (ZrC and SiC) composites. With an increase in carbon, the dominate phase was transferred from silicides to carbides. A further increase in carbon led to in situ formation of the ZrC/SiC/Al2O3 composite. The study confirmed ZrSiO4 as a source for the production of zirconium silicides, ZrC, and SiC." @default.
- W2896865125 created "2018-10-26" @default.
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- W2896865125 date "2019-02-01" @default.
- W2896865125 modified "2023-10-02" @default.
- W2896865125 title "Aluminothermic reduction of ZrSiO4 in the presence of carbon for in situ formation of Zr-based silicides/carbides composites" @default.
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- W2896865125 doi "https://doi.org/10.1016/j.jallcom.2018.10.130" @default.
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