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Science China Technological Sciences

, Volume 53, Issue 4, pp 1038–1042 | Cite as

SiC fiber with low electrical resistivity and oxygen content

  • DeYin Wang
  • XianHe Mao
  • YongCai SongEmail author
  • YingDe Wang
Article

Abstract

A new SiC fiber was prepared by the pyrolysis of polycarbosilane (PCS) fiber cured with unsaturated hydrocarbons. The fiber, with oxygen content of 4–6 wt%, offers high tensile strength of 2.5–2.8 GPa. The electrical resistivity of the fiber is only about 0.5 Ω·cm, much lower than general SiC fiber obtained from traditional air curing process. Degradation of mechanical property in argon and air at high temperature is retarded by 200–300°C with respect to the Nicalon NL-202 fiber. The low electrical resistivity of the fiber exhibits excellent thermal stability, it almost remains 0.4–0.8 Ω·cm after thermal exposure test from the room temperature to 1600°C in argon. The low electrical resistivity mainly attribute to an excess carbon layer which is about 50 nm in the circular outer part.

Keywords

polycarbonsilane SiC fiber electrical resistivity excess carbon layer 

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References

  1. 1.
    Muto N, Miyayama M, Yanagida H, et al. Infrared detection by Si-Ti-C-O fiber. J Am Ceram Soc, 1990, 3: 443–445CrossRefGoogle Scholar
  2. 2.
    Chauvet O, Stoto T, Zuppiroli L. Hopping conduction in a nanometer-size crystalline system: A SiC fiber. Phys Rev B, 1992, 46: 8139–8146CrossRefGoogle Scholar
  3. 3.
    Narisawa M, Itoi Y, Okamura K. Electrical resistivity of Si-Ti-CO fibers after rapid heat treatment. J Mater Sci, 1995, 30: 3401–3406CrossRefGoogle Scholar
  4. 4.
    Ishikawa T. Recent development of the SiC fiber Nicalon and its composites, including properties of the SiC fiber Hi-Nicalon for ultra-high temperature. Comp Sci Tech, 1994, 51: 135–144CrossRefGoogle Scholar
  5. 5.
    Zheng C M, Li X D, Yu Y X, et al. Conversion of polyaluminocarbosilane (PACS) to Si-Al-C-(O) fibers: Evolutions and effect of oxygen. Trans Nonferrous Met Soc China, 2006, 16: 254–258CrossRefGoogle Scholar
  6. 6.
    Chu Z Y, Feng C X, Song Y C, et al. Effect of oxygen content on tensile strength of polymer-derived SiC fibers. Trans Nonferrous Met Soc China, 2002, 12: 894–898Google Scholar
  7. 7.
    Li W, Song Y C, Mao X H. Mechanism of cyclohexene vapor curing polycarbosilane fibers. J Mater Sci, 2006, 41: 7011–7018CrossRefGoogle Scholar
  8. 8.
    Mao X H, Song Y C, Li W. Mechanism of curing process for polycarbosilane fiber with cyclohexene vapor. J Appl Polym Sci, 2007, 105: 1651–1657CrossRefGoogle Scholar
  9. 9.
    Yang D X, Song Y C, Mao X H, et al. Composition, structure and properties of low oxygen content SiC fibers. Key Eng Mat, 2007, 336-338: 1297–1300CrossRefGoogle Scholar
  10. 10.
    Hasegawa Y. Si-C fiber prepared from polycarbosilane cured without oxygen. J Inorg Organomet Polym, 1992, 2: 161–169CrossRefGoogle Scholar
  11. 11.
    Hasegawa Y. New curing method for polycarbosilane with unsaturated hydrocarbons and application to thermally stable SiC fibre. Comp Sci Tech, 1994, 51: 161–166CrossRefMathSciNetGoogle Scholar
  12. 12.
    Papakonstantinou C G, Balaguru P, Lyon R E. Comparative study of high temperature composite. Compos, 2001, 32: 637–649CrossRefGoogle Scholar
  13. 13.
    Hasegawa Y. Synthesis of continuous silicon carbide fibre. Part VI: Pyrolysis process of cured polycarbonsilane fibre and structure of SiC fibre. J Mater Sci, 1989, 24: 1177–1190CrossRefGoogle Scholar
  14. 14.
    Shimoo T, Okamura K, Mutoh W. Oxidation behavior and mechanical properties of low-oxygen SiC fibers prepared by vacuum heat-treatment of electron-beam-cured poly (carbonsilane) precursor. J Mater Sci, 2003, 38: 1653–1660CrossRefGoogle Scholar
  15. 15.
    Takeda M, Sakamoto J H, Imai Y, et al. Thermal stability of the low-oxygen-content silicon carbide fiber Hi-Nicalon™. Comp Sci Tech, 1999, 59: 813–819CrossRefGoogle Scholar
  16. 16.
    Fischbach D B, Lemoine P M. Influence of a CVD carbon coating on the mechanical property stability of Nicalon Silicon carbide fiber. Comp Sci Tech, 1990, 37: 55–61CrossRefGoogle Scholar

Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • DeYin Wang
    • 1
  • XianHe Mao
    • 1
  • YongCai Song
    • 1
    Email author
  • YingDe Wang
    • 1
  1. 1.State Key Lab of Novel Ceramic Fibers and CompositesNational University of Defense TechnologyChangshaChina

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