Microstructure and mechanical properties of carbon-carbon composites with multilayered pyrocarbon matrix

被引：80
作者：
Reznik, B
Guellali, M
Gerthsen, D
Oberacker, R
Hoffmann, W
机构：
[1] Univ Karlsruhe, Lab Elektronenmikroskopie, D-76128 Karlsruhe, Germany
[2] Univ Karlsruhe, Inst Keram Maschinenbau, D-76131 Karlsruhe, Germany
来源：
MATERIALS LETTERS | 2002年 / 52卷 / 1-2期
关键词：
carbon-carbon composites; CVI; microstructure; mechanical properties; fracture behavior;
D O I：
10.1016/S0167-577X(01)00357-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of matrix microstructure on the mechanical properties of carbon fiber felts infiltrated by isothermal chemical vapor infiltration (CVI) has been studied by optical microscopy, scanning electron microscopy and three-point bending tests. The nonbrittle fracture behavior of the investigated composites is related to multiple crack deflections caused by the interfacial sliding between pyrocarbon layers with a varying texture degree and the delamination microcracking within the highly textured pyrocarbon layer. An increase of the flexural strength is observed by the composite having a multilayered pyrocarbon matrix. (C) 2002 Elsevier Science B.V. All rights reserved.
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页码：14 / 19
页数：6
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