Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis of TiN/TiB2/Ti-silicides Nanocomposite Powders by Mechanochemical Reaction and its Reaction Mechanism

기계화학반응에 의한 TiN/TiB2/Ti-silicides 나노복합분말의 합성과 반응기구

  • Cho Young-Whan (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Kim Ji-Woo (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Shim Jae-Hyeok (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Ahn Jae-Pyoung (Nano-Materials Research Center, Korea Institute of Science and Technology) ;
  • Oh Kyu-Hwan (School of Materials Science and Engineering, Seoul National University)
  • 조영환 (나노재료연구센터, 한국과학기술연구원) ;
  • 김지우 (나노재료연구센터, 한국과학기술연구원) ;
  • 심재혁 (나노재료연구센터, 한국과학기술연구원) ;
  • 안재평 (나노재료연구센터, 한국과학기술연구원) ;
  • 오규환 (재료공학부, 서울대학교)
  • Published : 2005.08.01
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Abstract

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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References

  1. J. H. Shim, J. S. Byun and Y. W. Cho: Scr. Mater., 47 (2002) 493 https://doi.org/10.1016/S1359-6462(02)00188-4
  2. J. H. Shim, J. S. Byun and Y. W. Cho: J. Metastable and Nanocrystalline Mater., 15-16 (2003) 557 https://doi.org/10.4028/www.scientific.net/JMNM.15-16.557
  3. J. H. Shim, J. S. Byun and Y. W. Cho: J. Am. Ceram. Soc., 87 (2004) 1853 https://doi.org/10.1111/j.1151-2916.2004.tb06330.x
  4. J. S. Byun, J. H. Shim and Y. W. Cho: Scr. Mater., 50 (2004) 279 https://doi.org/10.1016/j.scriptamat.2003.09.050
  5. J. S. Byun, J. H. Shim and Y. W. Cho: J. Alloys and Compounds, 365 (2004) 149 https://doi.org/10.1016/S0925-8388(03)00638-8
  6. J. W. Kim, H. S. Chung, J. H. Shim, J. P. Ahn, Y. W. Cho and K. H. Oh: to be published in J. Alloys and Compounds
  7. B. D. Cullity and S. R. Stock: Elements of X-ray diffraction, Prentice Hall, London (2001) 167
  8. Z. A. Munir: Am. Ceram. Soc. Bull., 67 (1988) 342
  9. L. Takacs: Prog. Mater. Sci., 47 (2002) 355 https://doi.org/10.1016/S0079-6425(01)00002-0