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- W3090391029 abstract "Combustion synthesis involving metallothermic reduction of Fe2O3 and TiO2 was conducted in the mode of self-propagating high-temperature synthesis (SHS) to fabricate FeAl-based composites with dual ceramic phases, TiB2/Al2O3 and TiC/Al2O3. The reactant mixture included thermite reagents of 0.6Fe2O3+0.6TiO2+2Al, and elemental Fe, Al, boron, and carbon powders. The formation of xFeAl−0.6TiB2−Al2O3 composites with x=2.0−3.6 and yFeAl−0.6TiC−Al2O3 composites with y=1.8−2.75 was studied. The increase of FeAl causes a decrease in the reaction exothermicity, thus resulting in the existence of flammability limits of x=3.6 and y=2.75 for the SHS reactions. Based on combustion wave kinetics, the activation energies of Ea=97.1 and 101.1 kJ/mol are deduced for the metallothermic SHS reactions. XRD analyses confirm in situ formation of FeAl/TiB2/Al2O3 and FeAl/TiC/Al2O3 composites. SEM micrographs exhibit that FeAl is formed with a dense polycrystalline structure, and the ceramic phases, TiB2, TiC, and Al2O3, are micro-sized discrete particles. The synthesized FeAl−TiB2−Al2O3 and FeAl−TiC−Al2O3 composites exhibit the hardness ranging from 12.8 to 16.6 GPa and fracture toughness from 7.93 to 9.84 MPa·m1/2." @default.
- W3090391029 created "2020-10-08" @default.
- W3090391029 creator A5045199866 @default.
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- W3090391029 date "2020-09-01" @default.
- W3090391029 modified "2023-10-16" @default.
- W3090391029 title "Combustion synthesis of FeAl−Al2O3 composites with TiB2 and TiC additions via metallothermic reduction of Fe2O3 and TiO2" @default.
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- W3090391029 doi "https://doi.org/10.1016/s1003-6326(20)65397-3" @default.
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