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- W2037402380 abstract "Abstract The effect of Fe addition on the SHS reaction products of Fe–Ti–Si system was investigated. When Fe content is 0 wt.%, the product only consists of Ti 5 Si 3 . As the Fe content ranges from 10 to 30 wt.%, besides Ti 5 Si 3 and Fe phases, the transient Fe 2 Ti is also found in the final products. With a further increasing Fe content of 40 or 50 wt.%, however, in addition to Ti 5 Si 3 , Fe and Fe 2 Ti phases, the FeSi phase is also detected. Furthermore, the contents of Fe 2 Ti and FeSi phases as well as the solubility of Fe in Ti 5 Si 3 also increase with the increasing of Fe content. This indicates that Fe not only serves as a diluent, but also participates in the SHS reaction process. Moreover, addition of Fe has a great effect on the microstructures of SHS reaction products. When Fe content is 10 or 20 wt.%, the Ti 5 Si 3 exhibits cobblestone-like shape. When Fe content is increased to 30 wt.%, the Ti 5 Si 3 particulates are finer and most of them are surrounded by the bonding agents. As the Fe content is further increased to 50 wt.%, it is difficult to distinguish Ti 5 Si 3 particulates from Fe and its compounds. The Ti 5 Si 3 particulate sizes decrease from more than 6 to about 0.6 μm or less when Fe content in the preforms ranges from 10 to 50 wt.%. This is mainly due to the fact that the combustion temperature decreases with the increasing of Fe content. The addition of Fe provides more liquid phase for the Ti 5 Si 3 formation during SHS reaction process. The formation mechanism of Ti 5 Si 3 in Fe–Ti–Si system can be characterized by the solution, reaction and precipitation processes. This can be confirmed by the presence of bonding agents (remaining liquids), nearly spherical (cobblestone-like) morphology and relatively smooth surface of Ti 5 Si 3 particulates, as well as the presence of growth striation on the surface of Ti 5 Si 3 particulates." @default.
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- W2037402380 date "2008-05-01" @default.
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- W2037402380 title "Effect of Fe addition on self-propagating high-temperature synthesis of Ti5Si3 in Fe–Ti–Si system" @default.
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