Interfacial studies of carbon-carbon composites
1989; Elsevier BV; Volume: 29; Issue: 1-4 Linguagem: Inglês
10.1016/0304-3991(89)90235-0
ISSN1879-2723
AutoresW. Kowbel, P.S. Chen, H. Yenchang,
Tópico(s)Diamond and Carbon-based Materials Research
ResumoA detailed study of the microstructure of carbon-carbon composite was performed using transmission electron microscopy (TEM) techniques. Structural characterization is essential in order to fully understand the mechanical and physical properties of carbon-carbon composites. Thin samples of both transverse and longitudinal sections were prepared by using an ion-mill technique. An emphasis was placed on the interfaces between the fiber and the matrix in both longitudinal and transverse section. Bright field micrographs revealed different types of morphology existing within a complex 3D carbon-carbon composite. Dark field micrographs were used to analyze the crystallite size and orientation. Selected-area diffraction (SAD) and convergent-beam electron diffraction (CBED) were used to characterize the microstructure in terms of four parameters: preferred orientation parameter Z, stack height Lc, stack width La, and d002 spacing. Interfacial analysis showed a very complex interphase between the matrix and the fibers with entirely distinctive microstructural properties.
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