TABLE OF CONTENTS W. YANG, H. ARAKI, Q. L. HU, H. SUZUKI AND T. NODA
National Institute for Materials Science, 1-2-1, Tsukuba, Ibaraki 305-0047, Japan
E-mail: YANG.Wen@nims.go.jp
A. KOHYAMA
Institute of Advanced Energy, Kyoto University, CREST-ACE, Uji, Kyoto 611-0011, Japan
J.N. YU
China Institute of Atomic Energy, 102413, Beijing, China
The interfacial shear strengths (ISSs) of a series of 2D Hi-Nicalon/SiC composites with various pyrolitic carbon (PyC) or PyC-SiC multiple fiber/matrix interlayers were investigated using the single fiber pushout test. The ISS showed close PyC layer thickness dependence. The ISS decreased quickly from 505MPa to ~100MPa with increasing the PyC layer thickness up to ~200nm, beyond which slight decrease of the ISS occurred till 760nm of the PyC layer. The influence of the ISS .on the proportional limit stress (PLS) of the materials upon bending was discussed based on the experimental results and a thoretical model calculation. The ISS showed significant influence on the PLS. Good agreement between the model calculations and the experimental results was obtained, when correlating the PLS to the ISS. The comparison between the model calculation and the experimental results may be indicative on further efforts on further improvement of the mechanical performance of SiC/SiC composites.
Keywords: SiC/SiC composites, PyC and SiC interlayers, interfacial shear strength
As a high potential candidate for structural applications on advanced energy system such as nuclear fission and fusion, SiC/SiC composites has drawn great attention in the R&D of advanced material systems[1]. Recent efforts and achievements on the R&D of SiC/SiC...
