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- W2012122201 abstract "Preparation of the ternary carbide Ta2AlC was conducted by combustion synthesis in the mode of self-propagating high-temperature synthesis (SHS) from elemental powder compacts of different compositions. The synthesis reaction is characterized by a nearly planar combustion front traversing the entire sample in a self-sustaining manner. When compared with those of the reactant compact with stoichiometry of Ta:Al:C = 2:1:1, lower combustion front velocities and temperatures were observed for the samples containing more Al than the stoichiometric amount. The as-synthesized products are generally composed of Ta2AlC as the dominant phase along with two minor carbides Ta2C and Ta4AlC3, both of which can be reduced by increasing the amount of Al in the sample. On the other hand, an aluminide compound Ta2Al was detected in the final product when the green compact contained carbon less than the stoichiometric quantity. Finally, an optimum composition arrived at Ta:Al:C = 2:1.6:1, with which the powder compact produced single-phase Ta2AlC through SHS. The grains of Ta2AlC are typically plate-like with a size of 5–10 μm and the layered structure consisting of closely packed Ta2AlC is evident in the product obtained from the sample with sufficient Al. In addition, a set of possible reaction paths to produce Ta2AlC was proposed, including the reactions of Ta2C with Al and Ta2Al with carbon, as well as the interaction between Ta4AlC3, Ta2Al, and Al." @default.
- W2012122201 created "2016-06-24" @default.
- W2012122201 creator A5045199866 @default.
- W2012122201 creator A5071052638 @default.
- W2012122201 date "2009-08-01" @default.
- W2012122201 modified "2023-10-16" @default.
- W2012122201 title "Effects of Al content on formation of Ta2AlC by self-propagating high-temperature synthesis" @default.
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- W2012122201 doi "https://doi.org/10.1016/j.jallcom.2009.03.184" @default.
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