Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-10T16:59:27.048Z Has data issue: false hasContentIssue false
  • English
  • Français

Growth mechanism of Y α-SiAlON whiskers prepared by combustion synthesis

Published online by Cambridge University Press:  01 April 2005

Guanghua Liu ,
Kexin Chen ,
Heping Zhou ,
Xiaoshan Ning ,
C. Pereira  and
J.M.F. Ferreira
Guanghua Liu*
Affiliation:
Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, People's Republic of China
Kexin Chen
Affiliation:
Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, People's Republic of China
Heping Zhou
Affiliation:
Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, People's Republic of China
Xiaoshan Ning
Affiliation:
Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, People's Republic of China
C. Pereira
Affiliation:
Department of Ceramics and Glass Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal
J.M.F. Ferreira
Affiliation:
Department of Ceramics and Glass Engineering, University of Aveiro, CICECO, 3810-193 Aveiro, Portugal
*
a) Address all correspondence to this author. e-mail: kxchen@mail.tsinghua.edu.cn
Get access

Abstract

Novel Y α-SiAlON whiskers with high aspect ratios were prepared by combustion synthesis, except for common isotropic grains. The growth process of whiskers was investigated, and experimental results showed that the predominant growth mode of whiskers was the vapor–liquid–solid (VLS) mechanism. In contrast to the usual situation, here the liquid phase played two roles during the growth of Y α-SiAlON whiskers; that is to say, in addition to acting as a medium for mass transportation, the liquid phase took part in reactions itself. It was also found that proper addition of Fe2O3 could facilitate the development of whiskers with no remarkable deterioration on the phase assemblage of combustion products.

Keywords

CeramicCombustion synthesisGrain growth
Type
Research Article
Information
Journal of Materials Research , Volume 20 , Issue 4 , April 2005 , pp. 889 - 894
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Ekstrom, T. and Nygren, M.: SiAlON ceramics. J. Am. Ceram. Soc. 75, 259 (1992).CrossRefGoogle Scholar
2. Mandal, H.: New developments in α-SiAlON ceramics. J. Eur. Ceram. Soc. 19, 2349 (1999).CrossRefGoogle Scholar
3. Cheng, Y-B. and Thompson, D.P.: Pressureless sintering and phase relationships of samarium α-SiAlONs. J. Eur. Ceram. Soc. 14, 343 (1994).CrossRefGoogle Scholar
4. Chen, I-W. and Rosenflanz, A.: A tough SiAlON ceramic based on α–Si3N4 with a whisker-like microstructure. Nature 389, 701 (1997).CrossRefGoogle Scholar
5. Shen, Z-J., Zhao, Z., Peng, H. and Nygren, M.: Formation of tough interlocking microstructures in silicon nitride ceramics by dynamic ripening. Nature 417, 266 (2002).CrossRefGoogle ScholarPubMed
6. Patil, K.C., Aruna, S.T. and Mimani, T.: Combustion synthesis: An update. Curr. Opin. Solid State Mater. Sci. 6, 507 (2002).CrossRefGoogle Scholar
7. Chen, K-X., Jin, H-B., Oliveira, M., Zhou, H-P. and Ferreira, J.M.F.: Microstructure and formation mechanism of combustion-synthesized rodlike Ca α-SiAlON crystals. J. Mater. Res. 16, 1928 (2001).CrossRefGoogle Scholar
8. Chen, K-X., Costa, M.F.F.L., Zhou, H-P. and Ferreira, J.M.F.: Novel rodlike yttrium α-SiAlON crystalline powders prepared by combustion synthesis. Mater. Chem. Phys. 75, 252 (2002).CrossRefGoogle Scholar
9. Cano, I.G. and Rodriguez, M.A.: Synthesis of β-silicon nitride by SHS: Fiber growth. Scripta Mater. 50, 383 (2004).CrossRefGoogle Scholar
10. Rodriguez, M.A., Limpo, F.J., Escrifia, J.A. and Makhonin, N.S.: Single crystal β-SiAlON fibers obtained by self-propagating high-temperature synthesis. Scripta Mater. 37, 405 (1997).CrossRefGoogle Scholar
11. Sun, W-Y., Tien, T-Y. and Yen, T-S.: Solubility limits of αSiAlON solid solutions in the system Si, Al, Y/N, O. J. Am. Ceram. Soc. 74, 2547 (1991).CrossRefGoogle Scholar
12. Zenotchkine, M., Shuba, R. and Kim, J.: Synthesis of α-SiAlON seed crystals. J. Am. Ceram. Soc. 84, 1651 (2001).CrossRefGoogle Scholar
13. Levitt, A.P.: Whisker Technology (John Wiley & Sons, New York, 1970).Google Scholar