Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지

Processing and properties of $Al_{2}O_{3}/SiC$ nanocomposites by polycarbosilane infiltration

  • Jung-Soo Ha (School of Advanced Materials Engineering, Andong National University) ;
  • Chang-Sung Lim (Institute of Advanced Materials, CPRC, Hanseo University) ;
  • Chang-Sam Kim (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
  • Published : 2002.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

$Al_{2}O_{3}/SiC$ nanocomposites were made by infiltrating partially sintered alumina bodies with polycarbosilane (PCS) solutions, which is a SiC polymer precursor, with pressureless sintering. The SiC content, densification, phases, strength, and microstructure were investigated with the processing parameters such as PCS solution concentration and heat treatment condition for PCS pyrolysis and sintering. The results were compared with those for pure alumina and nanocomposite samples made by the existing polymer precursor route (i.e. the PCS addition process). The SiC contents of up to 1.5 vol% were obtained by the PCS infiltration. PCS pyrolysis, followed by air heat treatment, was needed before sintering to avoid a cracking problem and to attain a densification as high as 98 % of theoretical. The nanocomposites exhibited significantly higher strength than pure alumina and those prepared by the PCS addition process despite larger grain size. Besides $\alpha-Al_{2}O_{3}/SiC$ and $\beta-SiC$ phases, mullite was present a little in the nanocomposites, which resulted from the reaction of $SiO_{2}$ in the pyrolysis product of PCS with the $Al_{2}O_{3}$ matrix during sintering. The nanocomposites had intagranular particles believed to be SiC, which is a typical feature of $Al_{2}O_{3}/SiC$ nanocomposites.

Keywords

References

  1. J. Ceram Soc. Jpn. v.99 New design concept of structural ceramics: ceramic nanocomposites K. Niihara https://doi.org/10.2109/jcersj.99.974
  2. Advanced Structrual Inorganic Composites, P. Vincenzini, Ed. Particulate strengthened oxide ceramics-nanocomposites K. Niihara;A. Nakahira
  3. J. Cream. Soc. Jpn. v.100 Sintering behaviors and consolidation process for Al₂O₃-SiC nanocomposites A. Nakagira;K. Niihara https://doi.org/10.2109/jcersj.100.448
  4. J. Am. Ceram. Soc. v.76 Mechanical behavior of alumina-silicon carbide nanocomposites J. Zhao;L.C. Sterns;M.P. Harmer;H.M. Chan;G.A. Miller https://doi.org/10.1111/j.1151-2916.1993.tb03814.x
  5. J. Ceram. Soc. Jpn. v.102 Characterisitcs of Al₂O₃-SiC nanocomposite prepared by sol-gel processing Y. Xu;A. Nakahira;K. Niihara https://doi.org/10.2109/jcersj.102.312
  6. J. Am. Ceram. Soc. v.77 Processing and microstructure pariculate composites A. Piciacchio;S.-H. Lee;G.L. Messing https://doi.org/10.1111/j.1151-2916.1994.tb07112.x
  7. Material Processing and Design: Grain-Boundary-Controlled Properties of Fine Ceramics Ⅱ Effects of different states of SiC on the microstructural development of Al₂O₃-SiC nanocomposite Y. Xu;A. Nakahira;K. Niihara
  8. Cream. Trans. v.44 K. Niigara;K. Ishizaki;M. Isotani(Ed.)
  9. J. Am. Ceram. Soc. v.80 Effect of milling conditions on the strength of alumina-silicon carbide nanocomposites Y.-K. Jeong;A. Nakahira;P.E.D. Morgan;K. Niihara https://doi.org/10.1111/j.1151-2916.1997.tb02983.x
  10. J. Eur. Cram. Soc. v.10 Processing and microstructure development in Al₂O₃-SiC nanocomposites L.C. Stearns;J. Zhao;M.P. Harmer https://doi.org/10.1016/0955-2219(92)90022-6
  11. J. Eur. Ceram. Soc. v.17 Pressureless sintering and elastic constants of Al₂O₃-SiC nanocomposites C.C. Anya;S.G. Roberts https://doi.org/10.1016/S0955-2219(96)00092-1
  12. J. Eur. Ceram. Soc. v.17 Influence of processing on the microstructural development and flexure strength of Al₂O₃/SiC nanocomposites C.E. Borsa;N.M.R. Jones;R.J. Brook;R.I. Todd https://doi.org/10.1016/S0955-2219(96)00188-4
  13. J. Eur. Ceram. Soc. v.17 Review: structural ceramic nanocomposites J.I. Lee;N.L. Hecht;T.-I. Mah https://doi.org/10.1016/S0955-2219(96)00222-1
  14. J. Am. Ceram. Soc. v.81 In situ processing and properties of SiC/MoSi₂nanocomposites J.I. Lee;N.L. Hecht;T.-I. Mah https://doi.org/10.1111/j.1151-2916.1998.tb02351.x
  15. J. Mater. Sci. v.26 Conversion mechanisms of a polycarbosilance precursor into an SiC-based ceramic material E. Bouillon;F. Langlais;R. Pailler;R. Naslain;F. Cruege;J.C. Sarthou;A. Delpuech;C. Laffon;P. Lagarde;M. Monthioux;A. Oberlin https://doi.org/10.1007/BF00544474
  16. J. Mater. Sci. v.27 Effect of polycarbosilane addition on mechanical properties of hot-pressed silicon carbide Y.-W. Kim;J.-G. Lee https://doi.org/10.1007/BF01166016
  17. J. Mater. Sci. v.31 Synthesis of SiC form rice husks catalyzed by iron, cobalt or nickel F.J. Narciso-Romero;F. Rodriguez-Reinoso https://doi.org/10.1007/BF00367899