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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.44  No.9 (2003)  >  pp.1797-1801

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Flexural Strength of a Plain-Woven Tyranno-SA Fiber-Reinforced SiC Matrix Composite

Wen Yang1), Hiroshi Araki1), Akira Kohyama2), Chumphol Busabok1), Quanli Hu1), Hiroshi Suzuki1) and Tetsuji Noda1)
1) National Institute for Materials Science
2) Institute of Advanced Energy, Kyoto University

A SiC/SiC composite in a disc preform of 120 mm in diameter and 3.2 mm in thickness was fabricated by the chemical vapor infiltration (CVI) process. The composite was reinforced with plain-woven high-crystalline Tyarnno-SA fiber. Microstructure examinations and density measurements indicated a quite dense and very good space homogeneous matrix deposition in the composite. The fracture behavior and statistic reliability of the flexural strength upon three-point bending loading were investigated. The composite had an average flexural strength 597 MPa with a standard deviation 70 MPa. The statistic analysis of the strength showed good consistency among the bending specimens, with a Weibull modulus of 10.2, which is much higher than that for the Nicalon and Hi-Nicalon fibers reinforced CVI-SiC matrix SiC/SiC composites.

Tyranno-SA fiber, SiC/SiC composite, chemical vapor infiltration, flexural strength

Received: May 12, 2003
Accepted: July 11, 2003 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals



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