Analysis of Carbon Fibres and Carbon Composites by Asymmetric X-ray Diffraction Technique

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F99%3A00027376" target="_blank" >RIV/68407700:21220/99:00027376 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/S0008-6223(98)00207-3" target="_blank" >http://dx.doi.org/10.1016/S0008-6223(98)00207-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/S0008-6223(98)00207-3" target="_blank" >10.1016/S0008-6223(98)00207-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of Carbon Fibres and Carbon Composites by Asymmetric X-ray Diffraction Technique

Popis výsledku v původním jazyce

The effect of annealing on the microstructure of three sets of carbon fibers and their composites with a phenol-formaldehyde matrix was investigated by X-ray diffraction. An asymmetric diffraction geometry with parallel beam optics was used to get more information in comparison with conventional diffraction experiments. It was found that the microstructure of the samples is improved after annealing up to 2800 degrees C in terms of the following parameters: the narrowing of the orientation distribution function of (001) planes by a factor between 2 and 3 was observed, and this effect of the annealing ordering is more pronounced for the composites than for the fibers alone. The degree of graphitization increases by annealing, which is reflected in the decrease of the interplanar distance of (002) planes from about 3.51 Angstrom to 3.40 Angstrom, without any significant difference between the fibers and composites. The line broadening due to microstrains and small size effects is also strongly reduced by the annealing but the asymmetric shape of 100 and 110 reflections suggests that the layer stacking is still turbostratic.

Název v anglickém jazyce

Analysis of Carbon Fibres and Carbon Composites by Asymmetric X-ray Diffraction Technique

Popis výsledku anglicky

The effect of annealing on the microstructure of three sets of carbon fibers and their composites with a phenol-formaldehyde matrix was investigated by X-ray diffraction. An asymmetric diffraction geometry with parallel beam optics was used to get more information in comparison with conventional diffraction experiments. It was found that the microstructure of the samples is improved after annealing up to 2800 degrees C in terms of the following parameters: the narrowing of the orientation distribution function of (001) planes by a factor between 2 and 3 was observed, and this effect of the annealing ordering is more pronounced for the composites than for the fibers alone. The degree of graphitization increases by annealing, which is reflected in the decrease of the interplanar distance of (002) planes from about 3.51 Angstrom to 3.40 Angstrom, without any significant difference between the fibers and composites. The line broadening due to microstrains and small size effects is also strongly reduced by the annealing but the asymmetric shape of 100 and 110 reflections suggests that the layer stacking is still turbostratic.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

1999

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Carbon

ISSN

0008-6223

e-ISSN

1873-3891

Svazek periodika

37

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

421-425

Kód UT WoS článku

000079400700005

EID výsledku v databázi Scopus

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