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Advanced Performance Materials

, Volume 1, Issue 2, pp 145–155 | Cite as

A new type of fiber-bonded-ceramic material synthesized from pre-oxidized Si-Ti-C-O fiber

  • Shinji Kajii
  • Toshihiro Ishikawa
  • Kenji Matsunaga
  • Yasuhiko Kohtoku
Article

Abstract

Two types of fiber-bonded-ceramic material (FBC2123 or FBC1873) were synthesized from preoxidized Si-Ti-C-O fibers with oxide layers of 150 to 500 nm in thickness at 2123 K or 1873 K under 50 to 70 MPa. The interstices in both types of the materials were packed by an oxide material, which had existed on the surface of the pre-oxidized Si-Ti-C-O fiber. So, the dense, fiber-bonded-ceramic materials with small amount of the oxide matrix were obtained. During hot-pressing, carbon in excess of the non-stoichiometric ratio was released from the fiber and formed an interfacial layer on the surface of the fiber, beneath the pre-existing oxide material. Both FBC2123 and FBC1873 showed fibrous fracture patterns with high fracture energies at temperatures up to 1573 K and 1773 K, respectively. FBC2123 exhibited some plasticity in air at a temperature of 1673 K or over, due to the existence of amorphous silica in the matrix, and then a reduction in bending strength was observed at 1773 K in air. On the other hand, FBC1873 maintained its initial bending strength up to 1773 K in air, which is attributed to reduced crystallization of Si-Ti-C-O fiber and to the formation of cristobalite in the matrix.

Key words

polytitanocarbosilane Si-Ti-C-O fiber interfacial layer fibrous ceramics heat resistance 

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Copyright information

© Kluwer Academic Publishers 1994

Authors and Affiliations

  • Shinji Kajii
    • 1
  • Toshihiro Ishikawa
    • 1
  • Kenji Matsunaga
    • 1
  • Yasuhiko Kohtoku
    • 1
  1. 1.Ceramics Research Department, Inorganic Materials Research LaboratoryUbe Industries, Ltd.Ube City Yamaguchi PrefectureJapan

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