Experimental characterization of high-speed impact damage behavior in a three-dimensionally woven SiC/SiC composite

Keiji Ogi, Tomonaga Okabe, Manabu Takahashi, Shigeki Yashiro, Akinori Yoshimura, Toshio Ogasawara

研究成果: Article査読

52 被引用数 (Scopus)

抄録

This paper discusses high-speed impact damage in a three-dimensionally woven SiC/SiC composite (3D-CMC). The impact damage was introduced by a steel ball projectile in 3D-CMC plates with and without thermal exposure. The surface and internal damages were observed by optical microscopy and X-ray CT. A crater was observed on the collision surface. The X-ray CT measurement revealed that multiple pyramid-shaped cone cracks were generated beneath the crater when the impact speed was relatively low. At an impact speed exceeding the critical speed, a spall fragment was ejected from the back surface, while no internal damage was observed in the fragment. The spall fracture mode differed between the virgin and the thermally-exposed specimens. This difference is the result of embrittlement of the fiber/matrix interface due to oxidation of the carbon coating layer in the thermally-exposed specimen. In addition, it is found that z-yarns improve impact resistance by constraining delamination.

本文言語English
ページ(範囲)489-498
ページ数10
ジャーナルComposites Part A: Applied Science and Manufacturing
41
4
DOI
出版ステータスPublished - 2010 4 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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