- Synthesis of TiN/TiB2/Ti-silicides Nanocomposite Powders by Mechanochemical Reaction and its Reaction Mechanism
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Young-Whan Cho, Ji-Woo Kim, Jae-Hyeok Shim, Jae-Pyoung Ahn, Kyu-Hwan Oh
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J Korean Powder Metall Inst. 2005;12(4):273-278.
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DOI: https://doi.org/10.4150/KPMI.2005.12.4.273
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 Abstract
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- Nanostructured TiN/TiB_2/TiSi_2 and TiN/TiB_2/Ti_5Si_2 composite powders have been prepared by mechanochemical reaction from mixtures of Ti, BN, and Si_3N_4 powders. The raw materials have reacted to form a uniform mixture of TiN, TiB_2 and TiSi_2 or Ti_5Si_3 depending on the amount of Si_3N_4 used in the starting mixtures, and the reaction proceeded through so-called mechanically activated self-sustaining reaction (MSR). Fine TiN and TiB_2 crystallites less than a few tens of nanometer were homogeneously dispersed in the amorphous TiSi_2 or Ti_5Si_3 matrix after milling for 12 hours. These amorphous matrices became crystalline phases after annealing at high temperatures as expected, but the original microstructure did not change significantly.
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