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STEADY-STATE CREEP OF UNIDIRECTIONAL C/C COMPOSITE WITH PYROLYTIC CARBON MATRIX

R.Shi , G.X.Hu , H.J.Li and M.K.Kang (The State Education Commission Open Research Laboratory for High Temperature Materials and Testing , Shanghai Jiao Tong University , Shanghai 200030 , China)(Department of Materials Science and Engineering , Northwestern Polytechnical University , Xi'an 710072 , China)

金属学报(英文版)

The steady-state creep behavior of unidirectional C/C(1-D-C/C) composite with pyrolytic carbon matrix was investigated at high temperatures up to 2160℃ and under tensile stress from 133.83 to 213.46MPa. Based on the creep experiment of single specimen method, the apparent activation energy and the stress exponent for steadystate creep were determined by the use of a self-made apparatus and an auto-testing system. Value of apparent activation volume is provided and the creep mechanism has also been discussed.

关键词: 1-D-C/C , null , null

TEXTURES,INTERFACE AND FRACTURE OF A 1D-C/C PREPARED BY CVD

R.Shi , H.J. Li , Z. Yang and M.K. Kang(Dept. of Materials Science and Engineering , Northwestern Polytechnical University , Xi'an 710072 , China Manuscript received 26 August 1996)

金属学报(英文版)

A unidirectional carbon/carbon composite (1D-C/C) of low bulk density with textures of poruns granular and isotropic carbons sharply manifests brittle fracture and does not display high pseudoplasticity as expected. The results of transmisson electron microscopy (TEM) studies show that the strong interface of fiber-matrix should determine its fracture mode.

关键词: :1D-C/C , null , null , null

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