- Mechanical Engineering - Research Publications
Mechanical Engineering - Research Publications
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ItemIn-situ neutron diffraction of titanium silicide, Ti5Si3, during self-propagating high-temperature synthesis (SHS)Riley, DP ; Oliver, CP ; Kisi, EH (ELSEVIER SCI LTD, 2006-01)
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ItemSelf-propagating high-temperature synthesis of Ti3SiC2 from 3Ti+SiC+C reactantsRiley, DP ; Kisi, EH ; Wu, E ; McCallum, A (SPRINGER, 2003-08-01)
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ItemSelf-propagating high-temperature synthesis of Ti3SiC2:: I, ultra-high-speed neutron diffraction study of the reaction mechanismRiley, DP ; Kisi, EH ; Hansen, TC ; Hewat, AW (WILEY, 2002-10)In situneutron diffraction at 0.9 s time resolution was used to reveal the reaction mechanism during the self‐propagating high‐temperature synthesis (SHS) of Ti3SiC2from furnace‐ignited stoichiometric 3Ti + SiC + C mixtures. The diffraction patterns indicate that the SHS proceeded in five stages: (i) preheating of the reactants, (ii) the α→β phase transformation in Ti, (iii) preignition reactions, (iv) the formation of a single solid intermediate phase in <0.9 s, and (v) the rapid nucleation and growth of the product phase Ti3SiC2. No amorphous contribution to the diffraction patterns from a liquid phase was detected and, as such, it is unlikely that a liquid phase plays a major role in this SHS reaction. The intermediate phase is believed to be a solid solution of Si in TiC such that the overall stoichiometry is ∼3Ti:1Si:2C. Lattice parameters and known thermal expansion data were used to estimate the ignition temperature at 923 ± 10°C (supported by the α→β phase transformation in Ti) and the combustion temperature at 2320 ± 50°C.
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ItemReaction kinetics in Ti3SiC2 synthesis studied by time-resolved neutron diffractionWu, E ; Riley, DP ; Kisi, EH ; Smith, RI (ELSEVIER SCI LTD, 2005-10)